Front-Wheel Drive Axles
730, 733, 740,
745 and 750
COMPONENT TECHNICAL
MANUAL
Front-Wheel Drive Axles 730, 733,
740, 745 and 750
CTM4820 01JUL03 (ENGLISCH)
John Deere Werke Mannheim
Worldwide Edition
Printed in Germany
Introduction
Foreword
This manual is written for an experienced technician.
Essential tools required in performing certain service
work are identified in this manual and are
recommended for use.
Live with safety: Read the safety messages in the
introduction of this manual and the cautions presented
throughout the text of the manual.
This is the safety-alert symbol. When you see this
symbol on the machine or in this manual, be alert to
the potential for personal injury.
Use this Component Technical Manual in conjunction
with the machine Technical Manual. An application
listing in the introduction identifies
product-model/component type-model relationship. See
the machine technical manual for information on
component removal and installation, and gaining
access to the components.
Component Technical Manuals are concise service
guides for specific components. Component Technical
Manuals are written as stand-alone manuals covering
multiple machine applications.
Fundamental service information is available from
other sources covering basic theory of operation,
fundamentals of troubleshooting, general maintenance,
and basic type of failures and their causes.
LX24603,0000299 –19–14NOV01–1/1
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Introduction
General Information
This Component Technical Manual contains service
information and a description of the assembly and method
of operation of the following front-wheel drive axles:
• 700 Series
730, 733, 740, 745 and 750.
Triple Link Suspension (TLS) is dealt with NOT in this
Component Technical Manual but in the Technical
Manuals of the relevant tractor types.
LX24603,0000303 –19–01JUN03–1/1
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Introduction
LX1031381
–UN–13AUG03
Front-Wheel Drive Axles - Survey
LX1031382
–UN–13AUG03
Standard 730
750 with TLS and multi-disk brake
LX24603,00002EE –19–01JUN03–1/3
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Introduction
Refer to the axle type shown on the plate to identify repair
information in the Component Technical Manual.
A—Axle type/design
B—Axle serial number
C—Tractor model
D—Ratio
LX1029076
The type plate on 730, 733 and 740 front-wheel drive
axles is located on the right-hand side of the axle housing,
whereas on 745 and 750 axles it is located on the
left-hand side of the axle housing.
–UN–22AUG02
Type plate
LX24603,00002EE –19–01JUN03–2/3
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Introduction
Axle options
Tractors (not for North America)
730
6020
X
6120 and 6220
Xa
6320 and 6420
X
733
740
745
Xb, a, c, d
Xa, c, d
6420S
Xa, c, d
6520 and 6620
Xa, c, d
6820
Xa, c, d
6920 and 6920S
6215
X
6515
SE tractors: 6020, 6120, 6220, 6320 and 6420
X
X
SE tractors: 6520 and 6620
Tractors (North America)
6120 and 6220
X
730
X
733
Xa, c
6420
Xa, c, d
6320L, 6420L and 6520L
7220 and 7320
7420
7520
745
750
X
6615 and 6715
6120L, 6220L, 6320L and 6420L
740
a
6320
6215 and 6415
750
X
X
X
Xa, d
Xa, d
Xa, d
a
also available with TLS
b
also available as narrow track
c
also available with TLS and multi-disk brake
d
also available with AutoTrac
LX24603,00002EE –19–01JUN03–3/3
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Contents
Front-Wheel Drive Axles
Group 00—Safety Information
Group 01—General Repair Information
Group 05—Steering Cylinder and Tie-Rods
Group 10—Planetary Drive and Wheel Hub
Group 15—Knuckle Housing and Drive Shafts
Group 20—Axle Housing and Differential
Group 200—Description and Theory of Operation
INDX
All information, illustrations and specifications in this manual are based on
the latest information available at the time of publication. The right is
reserved to make changes at any time without notice.
COPYRIGHT  2003
DEERE & COMPANY
European Office Mannheim
All rights reserved
A John Deere ILLUSTRUCTION Manual
Previous Editions
Copyright  2002
CTM4820 (01JUL03)
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Front-Wheel Drive Axles
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Contents
INDX
CTM4820 (01JUL03)
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Front-Wheel Drive Axles
Contents
Page
Page
Group 00—Safety Information
Recognize Safety Information . . . . . . . . . . . . . . . . 00-1
“Important” - Information . . . . . . . . . . . . . . . . . . . . 00-1
“Note” - Information . . . . . . . . . . . . . . . . . . . . . . . . 00-1
Prevent Machine Runaway . . . . . . . . . . . . . . . . . . 00-1
Handle Fluids Safely—Avoid Fires . . . . . . . . . . . . 00-2
Prepare for Emergencies. . . . . . . . . . . . . . . . . . . . 00-2
Avoid High-Pressure Fluids . . . . . . . . . . . . . . . . . . 00-3
Remove Paint Before Welding or Heating . . . . . . . 00-4
Avoid Heating Near Pressurized Fluid Lines . . . . . 00-4
Work In Ventilated Area . . . . . . . . . . . . . . . . . . . . 00-5
Wear Protective Clothing. . . . . . . . . . . . . . . . . . . . 00-5
Practice Safe Maintenance . . . . . . . . . . . . . . . . . . 00-6
Park Machine Safely . . . . . . . . . . . . . . . . . . . . . . . 00-6
Use Proper Lifting Equipment . . . . . . . . . . . . . . . . 00-7
Construct Dealer-Made Tools Safely . . . . . . . . . . . 00-7
Support Machine Properly . . . . . . . . . . . . . . . . . . . 00-7
Work in Clean Area. . . . . . . . . . . . . . . . . . . . . . . . 00-8
Illuminate Work Area Safely . . . . . . . . . . . . . . . . . 00-8
Service Machines Safely . . . . . . . . . . . . . . . . . . . . 00-8
Use Proper Tools . . . . . . . . . . . . . . . . . . . . . . . . . 00-9
Service Tires Safely . . . . . . . . . . . . . . . . . . . . . . . 00-9
Service Front-Wheel Drive Tractor Safely . . . . . . 00-10
Dispose of Waste Properly . . . . . . . . . . . . . . . . . 00-10
Live With Safety . . . . . . . . . . . . . . . . . . . . . . . . . 00-11
Retighten Wheel Nuts . . . . . . . . . . . . . . . . . . . . . 00-11
Mixing of Lubricants . . . . . . . . . . . . . . . . . . . . . . 00-11
Lubricant Storage . . . . . . . . . . . . . . . . . . . . . . . . 00-12
Check and Adjust Tread (Basic Adjustment) . . . . 05-16
Check and Adjust Toe-In. . . . . . . . . . . . . . . . . . . 05-18
Check and Adjust Steering Angle . . . . . . . . . . . . 05-20
Group 10—Planetary Drive and Wheel Hub
Special or Essential Tools . . . . . . . . . . . . . . . . . . . 10-1
Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Planetary Drive and Wheel Hub Sectional View (Without Multi-Disk Brake) . . . . . 10-4
Planetary Drive, Multi-Disk Brake and
Wheel Hub - Sectional View . . . . . . . . . . . . . . . 10-6
Planetary Drive - Exploded View (Without
Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Planetary Drive Removal (Without
Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Planetary Drive Reconditioning (Without
Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-10
Planetary Drive Installation (Without
Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-14
Planetary Drive and Multi-Disk Brake—
Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . 10-16
Planetary Drive and Multi-Disk Brake
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
Planetary Drive Reconditioning (With
Multi-Disk Brake) . . . . . . . . . . . . . . . . . . . . . . . 10-20
Planetary Drive and Multi-Disk Brake
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Check Multi-Disk Brake for Leaks . . . . . . . . . . . . 10-28
Planetary Drive - Fill With Oil . . . . . . . . . . . . . . . 10-29
Wheel Hub - Exploded View . . . . . . . . . . . . . . . . 10-30
Remove Wheel Hub . . . . . . . . . . . . . . . . . . . . . . 10-31
Recondition the Wheel Hub. . . . . . . . . . . . . . . . . 10-32
Installing the Wheel Hub . . . . . . . . . . . . . . . . . . . 10-34
Group 01—General Repair Information
General Safety and Repair Information . . . . . . . . . 01-1
Front-Wheel-Drive Axles - Torques for Bolts
and Nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01-2
Group 05—Steering Cylinder and Tie-Rods
Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-2
Steering Cylinder and Tie-Rods —
Sectional View . . . . . . . . . . . . . . . . . . . . . . . . . . 05-3
Steering Cylinder and Tie-Rods —
Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . 05-4
Removing the Tie Rods. . . . . . . . . . . . . . . . . . . . . 05-5
Remove the Steering Cylinder. . . . . . . . . . . . . . . . 05-6
Recondition the Steering Cylinder . . . . . . . . . . . . . 05-7
Install the Steering Cylinder . . . . . . . . . . . . . . . . 05-12
Install the Tie-Rods . . . . . . . . . . . . . . . . . . . . . . . 05-13
CTM4820 (01JUL03)
Group 15—Knuckle Housing and Drive Shafts
Special or Essential Tools . . . . . . . . . . . . . . . . . . . 15-1
Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4
Knuckle Housing and Drive Shaft Sectional View . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
Knuckle Housing and Drive Shaft Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . 15-8
Remove Knuckle Housing . . . . . . . . . . . . . . . . . . . 15-9
Continued on next page
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Page
Recondition the Knuckle Housing and
King Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-11
Install Knuckle Housing . . . . . . . . . . . . . . . . . . . . 15-15
Knuckle Housing — Adjust the Preload at
the Knuckle Pin Bearings. . . . . . . . . . . . . . . . . 15-20
Knuckle Housing — Remove and Install
the Steering Angle Sensor . . . . . . . . . . . . . . . . 15-22
Removing the Drive Shafts . . . . . . . . . . . . . . . . . 15-23
Recondition the Drive Shafts . . . . . . . . . . . . . . . . 15-24
Installing the Drive Shafts . . . . . . . . . . . . . . . . . . 15-27
Group 20—Axle Housing and Differential
Special or Essential Tools . . . . . . . . . . . . . . . . . . . 20-1
Other Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-3
Differential — Sectional View . . . . . . . . . . . . . . . . 20-4
Differential — Exploded View . . . . . . . . . . . . . . . . 20-8
Axle Housing - Exploded View . . . . . . . . . . . . . . 20-10
Removing the Axle Housing . . . . . . . . . . . . . . . . 20-12
Repairing the Axle Housing . . . . . . . . . . . . . . . . . 20-13
Installing the Axle Housing . . . . . . . . . . . . . . . . . 20-14
Remove the Bevel Pinion Drive Shaft . . . . . . . . . 20-15
Repairing the Bevel Pinion Drive Shafts . . . . . . . 20-17
Install the Bevel Pinion Drive Shaft . . . . . . . . . . . 20-18
Removing the Differential . . . . . . . . . . . . . . . . . . 20-24
Recondition the Differential . . . . . . . . . . . . . . . . . 20-25
Install Differential. . . . . . . . . . . . . . . . . . . . . . . . . 20-34
Axle Housing - Fill with Oil . . . . . . . . . . . . . . . . . 20-39
Group 200—Description and Theory of Operation
Front Wheel Drive Axles - Summary of
References . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-1
Description of Front Wheel Drive. . . . . . . . . . . . . 200-2
Layout of Front Axle . . . . . . . . . . . . . . . . . . . . . . 200-3
Operation of Differential . . . . . . . . . . . . . . . . . . . 200-5
Operation of Self-Locking Differential . . . . . . . . . 200-7
Operation of Planetary Drive . . . . . . . . . . . . . . . . 200-8
Operation of Multi-Disk Brake . . . . . . . . . . . . . . . 200-9
Positive Front Wheel Lead Check . . . . . . . . . . . 200-10
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Group 00
Safety Information
Recognize Safety Information
00
1
–UN–07DEC88
This is a safety-alert symbol. When you see this symbol
on your machine or in this manual, be alert to the
potential for personal injury.
T81389
Follow recommended precautions and safe operating
practices.
DX,ALERT –19–29SEP98–1/1
“Important” - Information
Information marked as IMPORTANT points out problems
that may lead to machine damage. By following the
directions given, these problems can be avoided.
LX,CRA05 002885 –19–09APR92–1/1
“Note” - Information
When marked with NOTE the information given is more
detailed or contains restrictions to directions given
previously. On the other hand useful information may be
given belonging to certain instructions without being
directly connected to them.
LX,CRA05 002886 –19–09APR92–1/1
Prevent Machine Runaway
Avoid possible injury or death from machinery runaway.
–UN–11JAN89
Do not start engine by shorting across starter terminals.
Machine will start in gear if normal circuitry is bypassed.
TS177
NEVER start engine while standing on ground. Start
engine only from operator’s seat, with transmission in
neutral or park.
DX,BYPAS1 –19–29SEP98–1/1
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Safety Information
Handle Fluids Safely—Avoid Fires
Store flammable fluids away from fire hazards. Do not
incinerate or puncture pressurized containers.
Make sure machine is clean of trash, grease, and debris.
TS227
Do not store oily rags; they can ignite and burn
spontaneously.
–UN–23AUG88
When you work around fuel, do not smoke or work near
heaters or other fire hazards.
DX,FLAME –19–29SEP98–1/1
Prepare for Emergencies
Be prepared if a fire starts.
Keep emergency numbers for doctors, ambulance service,
hospital, and fire department near your telephone.
–UN–23AUG88
Keep a first aid kit and fire extinguisher handy.
TS291
00
2
DX,FIRE2 –19–03MAR93–1/1
CTM4820 (01JUL03)
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Safety Information
Avoid High-Pressure Fluids
00
3
Search for leaks with a piece of cardboard. Protect hands
and body from high pressure fluids.
X9811
Avoid the hazard by relieving pressure before
disconnecting hydraulic or other lines. Tighten all
connections before applying pressure.
–UN–23AUG88
Escaping fluid under pressure can penetrate the skin
causing serious injury.
If an accident occurs, see a doctor immediately. Any fluid
injected into the skin must be surgically removed within a
few hours or gangrene may result. Doctors unfamiliar with
this type of injury should reference a knowledgeable
medical source. Such information is available from Deere
& Company Medical Department in Moline, Illinois, U.S.A.
DX,FLUID –19–03MAR93–1/1
CTM4820 (01JUL03)
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Safety Information
Remove Paint Before Welding or Heating
Avoid potentially toxic fumes and dust.
• Remove paint a minimum of 100 mm (4 in.) from area
to be affected by heating. If paint cannot be removed,
wear an approved respirator before heating or welding.
• If you sand or grind paint, avoid breathing the dust.
Wear an approved respirator.
• If you use solvent or paint stripper, remove stripper with
soap and water before welding. Remove solvent or
paint stripper containers and other flammable material
from area. Allow fumes to disperse at least 15 minutes
before welding or heating.
TS220
Remove paint before heating:
–UN–23AUG88
Hazardous fumes can be generated when paint is heated
by welding, soldering, or using a torch.
Do not use a chlorinated solvent in areas where welding
will take place.
Do all work in an area that is well ventilated to carry toxic
fumes and dust away.
Dispose of paint and solvent properly.
DX,PAINT –19–24JUL02–1/1
Flammable spray can be generated by heating near
pressurized fluid lines, resulting in severe burns to
yourself and bystanders. Do not heat by welding,
soldering, or using a torch near pressurized fluid lines or
other flammable materials. Pressurized lines can be
accidentally cut when heat goes beyond the immediate
flame area.
–UN–15MAY90
Avoid Heating Near Pressurized Fluid Lines
TS953
00
4
DX,TORCH –19–03MAR93–1/1
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Safety Information
Work In Ventilated Area
00
5
TS220
If you do not have an exhaust pipe extension, open the
doors and get outside air into the area
–UN–23AUG88
Engine exhaust fumes can cause sickness or death. If it is
necessary to run an engine in an enclosed area, remove
the exhaust fumes from the area with an exhaust pipe
extension.
DX,AIR –19–17FEB99–1/1
Wear Protective Clothing
Wear a suitable hearing protective device such as
earmuffs or earplugs to protect against objectionable or
uncomfortable loud noises.
TS206
Prolonged exposure to loud noise can cause impairment
or loss of hearing.
–UN–23AUG88
Wear close fitting clothing and safety equipment
appropriate to the job.
Operating equipment safely requires the full attention of
the operator. Do not wear radio or music headphones
while operating machine.
DX,WEAR –19–10SEP90–1/1
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Safety Information
Practice Safe Maintenance
Understand service procedure before doing work. Keep
area clean and dry.
Never lubricate, service, or adjust machine while it is
moving. Keep hands, feet , and clothing from
power-driven parts. Disengage all power and operate
controls to relieve pressure. Lower equipment to the
ground. Stop the engine. Remove the key. Allow machine
to cool.
Securely support any machine elements that must be
raised for service work.
On towed implements, disconnect wiring harnesses from
tractor before servicing electrical system components or
welding on machine.
TS218
On self-propelled equipment, disconnect battery ground
cable (-) before making adjustments on electrical systems
or welding on machine.
–UN–23AUG88
Keep all parts in good condition and properly installed. Fix
damage immediately. Replace worn or broken parts.
Remove any buildup of grease, oil, or debris.
DX,SERV –19–17FEB99–1/1
Park Machine Safely
• Lower all equipment to the ground.
• Stop the engine and remove the key.
• Disconnect the battery ground strap.
• Hang a "DO NOT OPERATE" tag in operator station.
–UN–24MAY89
Before working on the machine:
TS230
00
6
DX,PARK –19–04JUN90–1/1
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Safety Information
Use Proper Lifting Equipment
00
7
Lifting heavy components incorrectly can cause severe
injury or machine damage.
TS226
–UN–23AUG88
Follow recommended procedure for removal and
installation of components in the manual.
DX,LIFT –19–04JUN90–1/1
Construct Dealer-Made Tools Safely
LX1016749
Do not weld tools unless you have the proper equipment
and experience to perform the job.
–UN–01JUL97
Faulty or broken tools can result in serious injury. When
constructing tools, use proper, quality materials, and good
workmanship.
DX,SAFE,TOOLS –19–10OCT97–1/1
Do not support the machine on cinder blocks, hollow tiles,
or props that may crumble under continuous load. Do not
work under a machine that is supported solely by a jack.
Follow recommended procedures in this manual.
TS229
Always lower the attachment or implement to the ground
before you work on the machine. If the work requires that
the machine or attachment be lifted, provide secure
support for them. If left in a raised position, hydraulically
supported devices can settle or leak down.
–UN–23AUG88
Support Machine Properly
When implements or attachments are used with a
machine, always follow safety precautions listed in the
implement or attachment operator’s manual.
DX,LOWER –19–24FEB00–1/1
CTM4820 (01JUL03)
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Safety Information
Work in Clean Area
T6642EJ
• Clean work area and machine.
• Make sure you have all necessary tools to do your job.
• Have the right parts on hand.
• Read all instructions thoroughly; do not attempt
shortcuts.
–UN–18OCT88
Before starting a job:
DX,CLEAN –19–04JUN90–1/1
TS223
Illuminate your work area adequately but safely. Use a
portable safety light for working inside or under the
machine. Make sure the bulb is enclosed by a wire cage.
The hot filament of an accidentally broken bulb can ignite
spilled fuel or oil.
–UN–23AUG88
Illuminate Work Area Safely
DX,LIGHT –19–04JUN90–1/1
Service Machines Safely
–UN–23AUG88
Tie long hair behind your head. Do not wear a necktie,
scarf, loose clothing, or necklace when you work near
machine tools or moving parts. If these items were to get
caught, severe injury could result.
Remove rings and other jewelry to prevent electrical
shorts and entanglement in moving parts.
TS228
00
8
DX,LOOSE –19–04JUN90–1/1
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Safety Information
Use Proper Tools
00
9
Use tools appropriate to the work. Makeshift tools and
procedures can create safety hazards.
–UN–08NOV89
Use power tools only to loosen threaded parts and
fasteners.
TS779
For loosening and tightening hardware, use the correct
size tools. DO NOT use U.S. measurement tools on
metric fasteners. Avoid bodily injury caused by slipping
wrenches.
Use only service parts meeting John Deere specifications.
DX,REPAIR –19–17FEB99–1/1
Service Tires Safely
Explosive separation of a tire and rim parts can cause
serious injury or death.
Do not attempt to mount a tire unless you have the proper
equipment and experience to perform the job.
Always maintain the correct tire pressure. Do not inflate
the tires above the recommended pressure. Never weld or
heat a wheel and tire assembly. The heat can cause an
increase in air pressure resulting in a tire explosion.
Welding can structurally weaken or deform the wheel.
TS211
Check wheels for low pressure, cuts, bubbles, damaged
rims or missing lug bolts and nuts.
–UN–23AUG88
When inflating tires, use a clip-on chuck and extension
hose long enough to allow you to stand to one side and
NOT in front of or over the tire assembly. Use a safety
cage if available.
DX,RIM –19–24AUG90–1/1
CTM4820 (01JUL03)
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Safety Information
L124515
When servicing front-wheel drive tractor with the rear
wheels supported off the ground and rotating wheels by
engine power, always support front wheels in a similar
manner. Loss of electrical power or transmission/
hydraulic system pressure will engage the front driving
wheels, pulling the rear wheels off the support if front
wheels are not raised. Under these conditions, front drive
wheels can engage even with switch in disengaged
position.
–UN–06AUG94
Service Front-Wheel Drive Tractor Safely
LX,MFWD2 –19–01MAY91–1/1
Dispose of Waste Properly
Use leakproof containers when draining fluids. Do not use
food or beverage containers that may mislead someone
into drinking from them.
Do not pour waste onto the ground, down a drain, or into
any water source.
–UN–26NOV90
Improperly disposing of waste can threaten the
environment and ecology. Potentially harmful waste used
with John Deere equipment include such items as oil, fuel,
coolant, brake fluid, filters, and batteries.
TS1133
00
10
Air conditioning refrigerants escaping into the air can
damage the Earth’s atmosphere. Government regulations
may require a certified air conditioning service center to
recover and recycle used air conditioning refrigerants.
Inquire on the proper way to recycle or dispose of waste
from your local environmental or recycling center, or from
your John Deere dealer.
DX,DRAIN –19–03MAR93–1/1
CTM4820 (01JUL03)
00-10
Front-Wheel Drive Axles
082903
PN=20
Safety Information
Live With Safety
00
11
TS231
–19–07OCT88
Before returning machine to customer, make sure
machine is functioning properly, especially the safety
systems. Install all guards and shields.
DX,LIVE –19–25SEP92–1/1
Retighten Wheel Nuts
L124516
–UN–03JAN95
Retighten wheel nuts at the intervals specified in the
Operator’s Manual section “Break-In Period”.
LX,CRA05 002995 –19–21APR92–1/1
Mixing of Lubricants
In general, avoid mixing different brands or types of oil.
Oil manufacturers blend additives in their oils to meet
certain specifications and performance requirements.
Consult your John Deere dealer to obtain specific
information and recommendations.
Mixing different oils can interfere with the proper
functioning of these additives and degrade lubricant
performance.
DX,LUBMIX –19–18MAR96–1/1
CTM4820 (01JUL03)
00-11
Front-Wheel Drive Axles
082903
PN=21
Safety Information
00
12
Lubricant Storage
Your equipment can operate at top efficiency only
when clean lubricants are used.
Make certain that all containers are properly marked to
identify their contents.
Use clean containers to handle all lubricants.
Properly dispose of all old containers and any residual
lubricant they may contain.
Whenever possible, store lubricants and containers in
an area protected from dust, moisture, and other
contamination. Store containers on their side to avoid
water and dirt accumulation.
DX,LUBST –19–18MAR96–1/1
CTM4820 (01JUL03)
00-12
Front-Wheel Drive Axles
082903
PN=22
Group 01
General Repair Information
General Safety and Repair Information
CAUTION: When performing repair work
comply with the following repair information
as well as the safety rules given at the
beginning of this manual! See "Safety
Information" in Group 00.
NOTE: The illustrations show parts and procedure on
one axle type, repair procedures however are
the same for all axle types.
Before performing service work on front axles, clean
them thoroughly.
Specified special tools must be used for service work.
These special tools have the appropriate dimensions
and therefore correct positioning is ensured.
Damaged or excessively worn parts must be replaced.
An experienced technician must evaluate whether
parts may be re-installed which are subjected to a
normal wear process (e.g. roller bearings, thrust plates
etc.).
Always replace parts like seals, O-rings, self-locking
screws and nuts.
Before re-installation of parts remove all gasket
material from sealing surfaces of housings. Remove
any burrs etc. using a whetstone.
Take extreme care to avoid that shavings or other
foreign material remain in housing.
01
1
Apply clean hydraulic oil to all bearings before
installing them.
For heating parts (bearings for example) only
appropriate heating devices must be used (oven, hot
air blower etc.). Under no circumstances exceed
specified temperature limits!
When heated parts have been installed, reseat them
after they have cooled down to ensure correct fit.
When re-assembling the front-wheel-drive axles note
the torques for hardware and specifications for
adjustments.
Unless otherwise specified tighten bolts and nuts to
the torques listed in the enclosed charts. See
"Front-Wheel-Drive Axles - Torques for Bolts and Nuts"
in this Group.
After repair work has been completed make sure that
the front-wheel-drive axle operates correctly.
The following and additional information can be found
under "Specifications", Section 10, Group 05 of the
Repair Technical Manual.
• For capacities, see "Capacities".
• For lubricant specifications, see "Front Wheel Drive
Axle Oil".
• For grease specifications, see "Grease".
Check that lubrication bores or grooves are not
restricted.
LX24603,0000343 –19–01JUL02–1/1
CTM4820 (01JUL03)
01-1
Front-Wheel Drive Axles
082903
PN=23
General Repair Information
01
2
Front-Wheel-Drive Axles - Torques for Bolts and Nuts
DO NOT use these values if a different torque value or
tightening procedure is given for a specific application.
Torque values listed are for general use only. Torque
values listed are for general use only.
Make sure fasteners threads are clean and that you
properly start thread engagement. This will prevent
them from failing when tightening.
Use only a torque wrench to tighten bolts and nuts.
Fasteners should be replaced with the same or higher
grade. If higher grade fasteners are used, these should
only be tightened to the strength of the original.
Metric ISO Standard Threads (N•m)
Grade
8.8
10.9
12.9
Loctite
242
270
242
270
242
270
Dimension
N•m
N•m
N•m
N•m
N•m
N•m
M6x1
9-10
10-11
14-16
15-17
16-18
18-20
M8x1.25
24-26
26-28
34-38
37-40
39-43
44-48
M10x1.5
48-53
52-58
68-75
73-81
80-88
88-97
M12x1.75
82-91
90-100
116-128
126-139
139-153
152-168
M14x2
129-143
143-158
182-202
200-221
221-244
238-263
M16x2
200-221
219-242
283-312
309-341
337-373
371-410
M18x2.5
276-305
299-331
390-431
428-473
466-515
509-562
M20x2.5
390-431
428-473
553-611
603-667
660-730
722-798
M22x2.5
523-578
575-635
746-824
817-903
893-987
974-1076
M24x3
675-746
732-809
950-1050
1040-1150
1140-1260
1240-1370
M27x3
998-1103
1088-1202
1411-1559
1539-1701
1710-1890
1838-2032
M30x3.5
1378-1523
1473-1628
1914-2115
2085-2305
2280-2520
2494-2757
Continued on next page
CTM4820 (01JUL03)
01-2
LX24603,0000304 –19–01JUL02–1/3
Front-Wheel Drive Axles
082903
PN=24
General Repair Information
01
3
Metric ISO Standard Threads (lb-ft)
Grade
Loctite
8.8
242
10.9
270
12.9
242
270
242
270
Dimension
lb-ft
lb-ft
lb-ft
lb-ft
lb-ft
lb-ft
M6x1
13-14
14-16
19-21
21-23
22-24
25-27
M8x1.25
32-36
35-39
46-51
50-55
53-58
59-65
M10x1.5
65-72
71-79
92-102
99-110
108-119
119-132
M12x1.75
111-123
122-136
157-174
171-188
188-207
206-228
M14x2
175-194
194-214
247-274
271-300
300-331
323-357
M16x2
271-300
297-328
384-423
419-462
457-506
503-556
M18x2.5
374-414
405-449
529-584
580-641
632-698
690-762
M20x2.5
529-584
580-641
750-828
818-904
895-990
979-1082
M22x2.5
709-784
780-861
1011-1117
1108-1224
1211-1338
1321-1459
M24x3
915-1011
992-1097
1288-1424
1410-1559
1546-1708
1681-1857
M27x3
1353-1495
1475-1630
1913-2114
2087-2306
2318-2562
2492-2755
M30x3.5
1868-2065
1997-2207
2595-2868
2827-3125
3091-3417
3381-3738
Metric ISO Fine Threads (N•m)
Grade
Loctite
8.8
242
10.9
270
242
12.9
270
242
270
Dimension
N•m
N•m
N•m
N•m
N•m
N•m
M8x1
26-28
27-30
36-40
40-44
43-47
47-52
M10x1.25
49-55
55-61
71-78
78-86
86-94
93-103
M12x1.25
90-100
98-109
128-142
139-154
152-168
166-184
M12x1.5
86-95
94-104
120-132
133-147
143-158
159-175
M14x1.5
143-158
157-173
200-222
219-242
238-263
261-289
M16x1.5
214-236
233-257
302-334
333-368
361-399
394-436
M18x1.5
312-345
342-378
442-489
485-536
527-583
580-641
M20x1.5
437-483
475-525
613-677
674-745
736-814
808-893
M22x1.5
581-642
637-704
822-908
903-998
998-1103
1078-1191
M24x2
741-819
808-893
1045-1155
1140-1260
1235-1365
1363-1507
M27x2
1083-1197
1178-1302
1520-1680
1672-1848
1834-2027
2000-2210
M30x2
1511-1670
1648-1822
2138-2363
2332-2577
2565-2835
2788-3082
Continued on next page
CTM4820 (01JUL03)
01-3
LX24603,0000304 –19–01JUL02–2/3
Front-Wheel Drive Axles
082903
PN=25
General Repair Information
01
4
Metric ISO Fine Threads (lb-ft)
Grade
Loctite
8.8
242
10.9
270
242
12.9
270
242
270
Dimension
lb-ft
lb-ft
lb-ft
lb-ft
lb-ft
lb-ft
M8x1
358-38
37-41
49-54
55-60
58-64
64-71
M10x1.25
67-74
75-83
97-106
106-117
117-127
126-140
M12x1.25
122-136
133-148
173-192
188-209
206-228
225-250
M12x1.5
117-129
127-141
163-179
180-199
194-214
216-237
M14x1.5
194-214
213-235
271-301
297-328
323-357
354-392
M16x1.5
290-320
316-348
409-453
451-499
489-541
534-591
M18x1.5
423-468
464-512
599-663
658-727
714-790
786-869
M20x1.5
592-655
644-712
831-918
914-1010
998-1104
1095-1211
M22x1.5
788-870
864-954
1114-1231
1224-1353
1353-1495
1462-1615
M24x2
1005-1110
1095-1211
1417-1566
154-1708
1674-18510
1848-2043
M27x2
1468-1623
1597-1765
2061-2278
2267-2506
2487-2748
2712-2996
M30x2
2049-2264
2234-2470
2899-3204
3162-3494
3478-3844
3780-4179
LX24603,0000304 –19–01JUL02–3/3
CTM4820 (01JUL03)
01-4
Front-Wheel Drive Axles
082903
PN=26
Group 05
Steering Cylinder and Tie-Rods
Other Material
05
1
Number
Name
Use
L414751 (U.S.)
243 (LOCTITE)
Thread lock
Install tie-rods on steering cylinder
piston rod.
Install the steering cylinder
assembly.
L81050 (U.S.)
MOLYKOTE G (U.S.)
Special grease
Steering cylinder, install flange on
cylinder sleeve.
Install steering cylinder on axle
housing.
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,00002FD –19–01JUN03–1/1
CTM4820 (01JUL03)
05-1
Front-Wheel Drive Axles
082903
PN=27
Steering Cylinder and Tie-Rods
05
2
Specifications
Item
Measurement
Specification
Steering cylinder on axle housing,
cap screws
Torque
129 to 143 N•m
95 to 105 lb-ft
730
Torque
240 to 270 N•m
177 to 199 lb-ft
733, 740, 745, 750
Torque
360 to 400 N•m
265 to 295 lb-ft
730, 733
Torque
200 to 220 N•m
148 to 162 lb-ft
740, 745, 750
Torque
350 to 390 N•m
258 to 287 lb-ft
730
Torque
220 to 240 N•m
162 to 177 lb-ft
733, 740, 745, 750
Torque
328 to 363 N•m
242 to 267 lb-ft
Front-wheel drive axle
Toe-in
1.5 mm
0.06 in.
Steering angle, locknut on adjusting
screw
Torque
120 N•m
89 lb-ft
Tie-rods on piston rod
Tie-rod to knuckle housing,
self-locking nut
Tie-rods, locknut
LX24603,0000305 –19–01JUN03–1/1
CTM4820 (01JUL03)
05-2
Front-Wheel Drive Axles
082903
PN=28
Steering Cylinder and Tie-Rods
Steering Cylinder and Tie-Rods — Sectional View
LX1032225
–UN–23JUL03
05
3
A—Piston rod
B—Cylinder sleeve
C—Guide rings
D—O-ring
E—Seal ring
F—Flange
G—Cap screw
H—Seal ring
I—Snap ring
J—Snap ring
K—Guide
L—Wiper ring
M—Back-up ring
N—Grooved ring
O—Spring pin
P—Snap ring
Q—Tie-rod (2 used)
R—Pivot
S—Self-locking nut
T—Steering angle adjusting
screw (2 used)
NOTE: 730, 733 and 740 axles have the axle housing
and steering cylinder transposed
(mirror-image).
LX24603,00002F8 –19–01JUN03–1/1
CTM4820 (01JUL03)
05-3
Front-Wheel Drive Axles
082903
PN=29
Steering Cylinder and Tie-Rods
–UN–23JUL03
Steering Cylinder and Tie-Rods — Exploded View
LX1031383
05
4
A—Wiper ring
B—Back-up ring
C—Grooved ring
D—Snap ring
E—Flange
F—Cylinder sleeve
G—Cap screw
H—Spring pin
I—Guide ring
J—Seal ring
K—O-ring
L—Piston rod
M—Guide
N—Seal ring
O—Snap ring
P—Snap ring
Q—Cap screw
R—Self-locking nut
S—Bushing1
T—Cap
U—Tie-rod (2 used)
V—Locknut (2 used)
W—Pivot (2 used)
1
Only if dimension (x) is 90 mm (3.5 in.) or more.
Continued on next page
CTM4820 (01JUL03)
05-4
LX24603,00002F9 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=30
Steering Cylinder and Tie-Rods
05
5
NOTE: 730, 733 and 740 axles have the axle housing
and steering cylinder transposed
(mirror-image).
LX24603,00002F9 –19–01JUN03–2/2
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
LX1029079
1. Remove self-locking nut.
–UN–06AUG02
Removing the Tie Rods
LX24603,00002FA –19–01JUL02–1/3
LX1029080
–UN–06AUG02
2. Press tie rod out of knuckle housing.
LX24603,00002FA –19–01JUL02–2/3
NOTE: Thread of tie rod is locked in position with thread
lock L41475 (LOCTITE 243).
LX1029081
NOTE: Install tie rods, see "Installing the Tie Rods" in this
Group.
–UN–06AUG02
3. Separate tie rod and piston rod.
LOCTITE is a registered trademark of the Loctite Corporation
CTM4820 (01JUL03)
LX24603,00002FA –19–01JUL02–3/3
05-5
Front-Wheel Drive Axles
082903
PN=31
Steering Cylinder and Tie-Rods
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1029082
NOTE: 730, 733 and 740 axles have the axle housing
and steering cylinder transposed (mirror-image).
–UN–06AUG02
Remove the Steering Cylinder
NOTE: Remove tie-rods, see reference “Remove the
Tie-Rods” in this Group.
1. Take out the screws.
LX24603,00002FB –19–01JUN03–1/2
2. Remove steering cylinder from axle housing.
Install steering cylinder, see reference “Install the
Steering Cylinder” in this Group.
–UN–06AUG02
NOTE: Recondition the steering cylinder, see reference
“Recondition the Steering Cylinder” in this Group.
LX1029083
05
6
LX24603,00002FB –19–01JUN03–2/2
CTM4820 (01JUL03)
05-6
Front-Wheel Drive Axles
082903
PN=32
Steering Cylinder and Tie-Rods
Recondition the Steering Cylinder
05
7
–UN–06AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1029084
NOTE: Remove steering cylinder, see reference “Remove
the Steering Cylinder” in this Group.
Remove piston rod
1. Remove flange (B), if necessary.
a. Remove spring pin (A).
b. Remove flange (B) and snap ring (C).
LX24603,00002FC –19–01JUN03–1/13
LX1029085
–UN–06AUG02
2. Remove snap ring (A).
LX24603,00002FC –19–01JUN03–2/13
LX1029086
–UN–06AUG02
3. Push guide into cylinder sleeve and remove snap ring
(A).
Continued on next page
CTM4820 (01JUL03)
05-7
LX24603,00002FC –19–01JUN03–3/13
Front-Wheel Drive Axles
082903
PN=33
Steering Cylinder and Tie-Rods
4. Remove piston rod (A) and guide (B).
LX1029088
–UN–07AUG02
5. Remove all seal rings from cylinder sleeve, piston rod
and guide.
LX24603,00002FC –19–01JUN03–4/13
Install seal rings
1. Install seal rings on cylinder sleeve.
–UN–07AUG02
a. Install grooved ring (A) with the sealing lip facing
inward.
LX1029897
b. Install back-up ring (B).
c. Install wiper ring (C) with the dust lip facing
outward.
d. Check that the seal rings are installed in their
correct positions.
–UN–07AUG02
A—Grooved ring
B—Back-up ring
C—Wiper ring
LX1029898
05
8
Continued on next page
CTM4820 (01JUL03)
05-8
LX24603,00002FC –19–01JUN03–5/13
Front-Wheel Drive Axles
082903
PN=34
Steering Cylinder and Tie-Rods
05
9
2. Install seal rings on guide.
a. Install seal ring (A) on the outside of guide (B).
–UN–20AUG02
b. Install grooved ring (C) with the sealing lip facing
inward.
LX1029091
c. Install back-up ring (D).
d. Install wiper ring (E) with the dust lip facing
outward.
e. Check that the seal rings are installed in their
correct positions.
LX1029896
–UN–07AUG02
LX1029895
–UN–07AUG02
A—Outer seal ring
B—Guide
C—Grooved ring
D—Back-up ring
E—Wiper ring
Continued on next page
CTM4820 (01JUL03)
05-9
LX24603,00002FC –19–01JUN03–6/13
Front-Wheel Drive Axles
082903
PN=35
Steering Cylinder and Tie-Rods
3. Install seal rings on piston.
a. Install O-ring (A) in center groove.
–UN–07AUG02
b. Install seal ring (B) over O-ring (A).
c. Install guide rings (C).
LX1029089
d. Check that the seal rings are installed in their
correct positions.
LX1029090
–UN–07AUG02
A—O-ring
B—Seal ring
C—Guide ring (2 used)
LX24603,00002FC –19–01JUN03–7/13
Install piston rod
–UN–07AUG02
NOTE: Before installing, coat the sealing surfaces and
the seal rings lightly with oil.
LX1029899
1. Install guide (A) on the piston rod.
LX24603,00002FC –19–01JUN03–8/13
–UN–03JUL03
2. With the two flat surfaces (A) that allow the rod to be
gripped with a wrench going in first, insert the piston
rod into the cylinder sleeve.
LX1031384
05
10
Continued on next page
CTM4820 (01JUL03)
05-10
LX24603,00002FC –19–01JUN03–9/13
Front-Wheel Drive Axles
082903
PN=36
Steering Cylinder and Tie-Rods
05
11
3. Push the guide of the piston rod in so that the inner
snap ring can be installed.
LX1029900
–UN–07AUG02
4. Insert inner snap ring (A) into groove in cylinder
sleeve.
LX24603,00002FC –19–01JUN03–10/13
LX1029901
–UN–24OCT02
5. Pull piston rod (C) until guide (A) contacts snap ring
(B).
LX24603,00002FC –19–01JUN03–11/13
LX1029085
–UN–06AUG02
6. Install snap ring (A).
Continued on next page
CTM4820 (01JUL03)
05-11
LX24603,00002FC –19–01JUN03–12/13
Front-Wheel Drive Axles
082903
PN=37
Steering Cylinder and Tie-Rods
7. Install flange (B).
a. Install snap ring (C).
–UN–06AUG02
b. Apply special grease MOLYKOTE G (L81050) to
the contact surfaces of flange and cylinder sleeve.
LX1029084
c. Position flange (B) and secure it with spring pin (A).
8. Install steering cylinder, see reference “Install the
Steering Cylinder” in this Group.
LX24603,00002FC –19–01JUN03–13/13
Install the Steering Cylinder
–UN–06AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
NOTE: 730, 733 and 740 axles have the axle housing
and steering cylinder transposed (mirror-image).
LX1029083
05
12
1. Apply special grease MOLYKOTE G (L81050) to the
contact surfaces of steering cylinder and axle housing.
2. Insert steering cylinder into axle housing.
Continued on next page
CTM4820 (01JUL03)
05-12
LX24603,00002FE –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=38
Steering Cylinder and Tie-Rods
05
13
3. Coat cap screw threads with LOCTITE 2431 (L41475).
4. Install cap screws and tighten them evenly.
–UN–07AUG02
Specification
Cap screws—Torque ......................................................... 129 to 143 N•m
95 to 105 lb-ft
LX1029904
5. Install tie-rods, see reference “Install the Tie-Rods” in
this Group.
1
for North America: LOCTITE 242 (TY9370)
LX24603,00002FE –19–01JUN03–2/2
Install the Tie-Rods
–UN–07AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1029905
1. Coat approx. 3 turns of the thread on the tie-rod (see
arrow) with L41475 thread lock (LOCTITE 2431).
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,00002FF –19–01JUN03–1/3
2. Install tie-rods on piston rod.
LX1029081
–UN–06AUG02
Specification
730—Torque ...................................................................... 240 to 270 N•m
177 to 199 lb-ft
733, 740, 745, 750—Torque ............................................. 360 to 400 N•m
265 to 295 lb-ft
Continued on next page
CTM4820 (01JUL03)
05-13
LX24603,00002FF –19–01JUN03–2/3
Front-Wheel Drive Axles
082903
PN=39
Steering Cylinder and Tie-Rods
Specification
730, 733—Torque ............................................................. 200 to 220 N•m
148 to 162 lb-ft
740, 745, 750—Torque ..................................................... 350 to 390 N•m
258 to 287 lb-ft
4. For basic adjustment of tread, see reference “Check
and Adjust Tread (Basic Adjustment)” in this Group.
–UN–07AUG02
3. Using a new self-locking nut, install tie-rod to knuckle
housing.
LX1029907
05
14
LX24603,00002FF –19–01JUN03–3/3
CTM4820 (01JUL03)
05-14
Front-Wheel Drive Axles
082903
PN=40
Steering Cylinder and Tie-Rods
05
15
CTM4820 (01JUL03)
05-15
Front-Wheel Drive Axles
082903
PN=41
Steering Cylinder and Tie-Rods
–UN–24OCT02
Check and Adjust Tread (Basic Adjustment)
LX1029908
05
16
For example:
Check tread basic adjustment
1. Move steering cylinder piston rod to center position.
Dimension (a), measured ............................... 273 mm (10.748 in.)
Dimension (b), measured ..................................... 3 mm (0.118 in.)
Center position, determine dimension (x):
Formula: x = (a - b) : 2
a. Remove adjusting screws for left and right
steering angle.
x = (273 mm - 3 mm) : 2 = 135 mm
(x = (10.748 in. - 0.118 in.) : 2 = 5.315 in.)
b. Determining dimension (a): Move piston rod to
r.h. stop of steering cylinder. Measure distance
between steering cylinder face (B) and axial joint
face (C).
c. Determining dimension (b): Move piston rod to
l.h. stop of steering cylinder. Measure distance
between steering cylinder face (B) and axial joint
face (C).
d. Determine dimension (x).
e. Move piston rod until the determined distance (x)
is obtained. The piston rod of steering cylinder is
now in center position.
f. Install adjusting screws for left and right steering
angle.
2. Check if distances A1 to A4 are equal. Re-adjust if
necessary.
Continued on next page
CTM4820 (01JUL03)
05-16
LX24603,0000300 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=42
Steering Cylinder and Tie-Rods
05
17
Basic adjustment of tread
2. Turn threaded rod (B) of pivot on left and right tie-rod
in or out until distances A1 to A4 are equal.
3. Tighten locknut (A).
LX1032226
1. Loosen locknut (A) on left and right tie-rod.
–UN–03JUL03
IMPORTANT: When adjusting make sure that piston
rod remains in previously adjusted
center position.
Specification
730—Torque ...................................................................... 220 to 240 N•m
162 to 177 lb-ft
733, 740, 745, 750—Torque ............................................. 328 to 363 N•m
242 to 267 lb-ft
4. Check tread basic adjustment again.
5. Adjust toe-in, see reference “Check and Adjust Toe-In”
in this Group.
LX24603,0000300 –19–01JUN03–2/2
CTM4820 (01JUL03)
05-17
Front-Wheel Drive Axles
082903
PN=43
Steering Cylinder and Tie-Rods
Check and Adjust Toe-In
–UN–02JAN95
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
Checking toe-in
At front axle height, measure the distance both front and
rear from wheel rim to wheel rim.
LX009841
05
18
1. Measure dimension (A).
2. Turn the front wheels through half a turn.
3. Measure dimension (B) at the same point where
dimension (A) was measured.
Dimension (A) must not differ from dimension (B) by more
than 1.5 mm (0.06 in.).
Specification
Front-wheel drive axle—Toe-in ...................................................... 1.5 mm
0.06 in.
Continued on next page
CTM4820 (01JUL03)
05-18
LX24603,0000302 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=44
Steering Cylinder and Tie-Rods
05
19
Adjusting toe-in
Specification
Front-wheel drive axle—Toe-in ...................................................... 1.5 mm
0.06 in.
2. Tighten locknut (A).
LX1032226
1. Loosen locknut (A) and screw threaded rod (B) of pivot
in or out.
–UN–03JUL03
NOTE: Adjust toe-in equally at both tie-rods.
Specification
730—Torque ...................................................................... 220 to 240 N•m
162 to 177 lb-ft
733, 740, 745, 750—Torque ............................................. 328 to 363 N•m
242 to 267 lb-ft
3. Check toe-in adjustment again.
4. Adjust steering angle, see reference “Check and Adjust
Steering Angle” in this Group.
LX24603,0000302 –19–01JUN03–2/2
CTM4820 (01JUL03)
05-19
Front-Wheel Drive Axles
082903
PN=45
Steering Cylinder and Tie-Rods
Check and Adjust Steering Angle
–UN–04FEB98
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
NOTE: Steering angle must be the same on both sides.
LX1019515
NOTE: Steering angle adjustment depends on how the
tractor is equipped (tire size, front fenders and
implements). Dimension (C) can be found in the
relevant Operator’s Manual.
1. Measure dimension (C).
–UN–23JUL03
2. If necessary, adjust steering angle by means of screw
(A).
3. Determine dimension (x). If dimension (x) is 90 mm
(3.5 in.) or more, bushing1 (D) must be installed.
4. After making adjustments, tighten locknut (B).
LX1031385
05
20
Specification
Locknut—Torque .......................................................................... 120 N•m
89 lb-ft
A—Adjusting screw
B—Locknut
C—Dimension
D—Bushing1
1
Available as spare part
LX24603,0000301 –19–01JUN03–1/1
CTM4820 (01JUL03)
05-20
Front-Wheel Drive Axles
082903
PN=46
Group 10
Planetary Drive and Wheel Hub
Special or Essential Tools
10
1
NOTE: Order tools according to information given in the
U.S. SERVICEGARD Catalog or European
Microfiche Tool Catalog (MTC).
SERVICEGARD is a trademark of Deere & Company
LX24603,0000336 –19–01JUN03–1/3
KJD10279 –UN–04AUG03
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10279
Installing wheel hub seal
LX24603,0000336 –19–01JUN03–2/3
LX001364 –UN–16MAR95
Hydraulic hand-operated pump . . . . . . . . . . D01019AA
Checking multi-disk brake system for leaks
LX24603,0000336 –19–01JUN03–3/3
Other Material
Number
Name
Use
L414751 (U.S.)
243 (LOCTITE)
Thread lock
Screws, hollow ring gear to knuckle
housing
Special screws, brake piston to
hollow ring gear flange
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,0000337 –19–01JUN03–1/1
CTM4820 (01JUL03)
10-1
Front-Wheel Drive Axles
082903
PN=47
Planetary Drive and Wheel Hub
10
2
Specifications
Item
Measurement
Specification
Hollow ring gear to knuckle housing,
screws
Torque
68 to 75 N•m
50 to 55 lb-ft
Planetary carrier to wheel hub,
screws
Torque
40 to 50 N•m
30 to 36 lb-ft
Brake piston to hollow ring gear,
special screws
Torque
10 to 15 N•m
7.5 to 11 lb-ft
Planetary carrier, screw plug
Torque
90 N•m
66 lb-ft
Brake
Test pressure
5000 kPa
50 bar
725 psi
Brake
Drop in pressure
0.0 kPa over 3 minutes
0.0 bar over 3 minutes
0.0 psi over 3 minutes
Leak-test for disk brake
LX24603,0000338 –19–01JUN03–1/1
CTM4820 (01JUL03)
10-2
Front-Wheel Drive Axles
082903
PN=48
Planetary Drive and Wheel Hub
10
3
CTM4820 (01JUL03)
10-3
Front-Wheel Drive Axles
082903
PN=49
Planetary Drive and Wheel Hub
–UN–30JUL03
Planetary Drive and Wheel Hub - Sectional View (Without Multi-Disk Brake)
LX1032227
10
4
Sectional view (733)
A—Knuckle housing
B—Wheel hub
C—Snap ring
D—Flange
E—Hollow ring gear
F—Needle bearing
G—Planetary gear (31 or 42
used)
H—Planetary carrier
I—Seal ring
J—Tapered roller bearing
K—Drive shaft
1
On 730
2
On 733
Continued on next page
CTM4820 (01JUL03)
10-4
LX24603,0000306 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=50
Planetary Drive and Wheel Hub
LX1031386
–UN–30JUL03
10
5
Sectional view (750 without multi-disk brake)
A—Knuckle housing
B—Wheel hub
C—Snap ring
D—Flange
E—Hollow ring gear
F—Tapered roller bearing
G—Planetary gear (31 or 42
used)
H—Tapered roller bearing
I—Planetary carrier
J—Seal ring
K—Tapered roller bearing
L—Drive shaft
1
On 740 and 745
2
On 750
LX24603,0000306 –19–01JUN03–2/2
CTM4820 (01JUL03)
10-5
Front-Wheel Drive Axles
082903
PN=51
Planetary Drive and Wheel Hub
–UN–30JUL03
Planetary Drive, Multi-Disk Brake and Wheel Hub - Sectional View
LX1032228
10
6
Sectional view (733 with multi-disk brake)
A—Knuckle housing
B—Wheel hub
C—Snap ring
D—Flange
E—Hollow ring gear
F—Needle bearing
G—Planet gear (4 used)
H—Planetary carrier
I—Seal ring
J—Tapered roller bearing
K—Drive shaft
L—Brake piston
M—Externally splined disk (3
used)
Continued on next page
CTM4820 (01JUL03)
10-6
N—Internally splined disk (2
used)
O—Snap ring
LX24603,0000307 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=52
Planetary Drive and Wheel Hub
LX1031387
–UN–30JUL03
10
7
Sectional view (750 with multi-disk brake)
A—Knuckle housing
B—Wheel hub
C—Snap ring
D—Flange
E—Hollow ring gear
F—Tapered roller bearing
G—Planetary gear (31 or 42
used)
H—Tapered roller bearing
I—Planetary carrier
J—Seal ring
K—Tapered roller bearing
L—Drive shaft
M—Brake piston
N—Externally splined disk
O—Internally splined disk (2
used)
P—Externally splined disk (2
used)
Q—Snap ring
1
On 740 and 745
2
On 750
LX24603,0000307 –19–01JUN03–2/2
CTM4820 (01JUL03)
10-7
Front-Wheel Drive Axles
082903
PN=53
Planetary Drive and Wheel Hub
–UN–30JUL03
Planetary Drive - Exploded View (Without Multi-Disk Brake)
LX1031388
10
8
A—Snap ring
B—Flange
C—Hollow ring gear
D—Snap ring
E—Tapered roller bearing1, 2
F—Planetary gear (31 or 42
used)
G—Tapered roller bearing1, 2
H—Cap screw (12 used)
I—Planetary carrier
J—Fillister-head screw (2
used)
K—O-ring
L—Screw plug
M—Snap ring
N—Planetary gear (33 or 44
used), with needle bearing
1
On 740 and 745
2
On 750
3
On 730
4
On 733
LX24603,0000308 –19–01JUN03–1/1
CTM4820 (01JUL03)
10-8
Front-Wheel Drive Axles
082903
PN=54
Planetary Drive and Wheel Hub
Planetary Drive Removal (Without Multi-Disk
Brake)
10
9
–UN–09AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1029913
Removing the planetary carrier
1. Remove screw plug and drain oil.
LX24603,0000309 –19–01JUN03–1/5
LX1029914
–UN–09AUG02
2. Take out screws (A).
LX24603,0000309 –19–01JUN03–2/5
NOTE: Using a screwdriver at the grooves provided, pry
planetary carrier off the wheel hub.
LX1029915
–UN–09AUG02
3. Remove planetary carrier (A).
LX24603,0000309 –19–01JUN03–3/5
Removing the hollow ring gear
–UN–09AUG02
NOTE: Cap screws are installed with L41475 thread lock
(LOCTITE 243).
LX1029916
1. Take out cap screws.
LOCTITE is a registered trademark of the Loctite Corporation
CTM4820 (01JUL03)
Continued on next page
10-9
LX24603,0000309 –19–01JUN03–4/5
Front-Wheel Drive Axles
082903
PN=55
Planetary Drive and Wheel Hub
2. Remove hollow ring gear by using two M8 x 100 mm
screws.
LX1031395
–UN–03JUL03
3. Recondition the planetary drive, see reference
“Planetary Drive Reconditioning (Without Multi-Disk
Brake)” in this Group.
LX24603,0000309 –19–01JUN03–5/5
Planetary Drive Reconditioning (Without
Multi-Disk Brake)
–UN–03JUL03
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1031389
NOTE: Remove planetary carrier, see reference
“Planetary Drive Removal (Without Multi-Disk
Brake)” in this Group.
Reconditioning the planetary gears (730 and 733)
NOTE: Mark position of planetary gears so they can be
re-installed properly.
1. Remove the snap ring.
LX24603,000030A –19–01JUN03–1/11
2. Pull off planetary gear together with its needle bearing.
–UN–03JUL03
NOTE: The needle bearing is secured to the planetary
gear by a snap ring and cannot be taken off on its
own. If either the planetary gear or needle bearing
need to be replaced, they must be replaced
together as a matching set.
3. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX1031390
10
10
Continued on next page
CTM4820 (01JUL03)
10-10
LX24603,000030A –19–01JUN03–2/11
Front-Wheel Drive Axles
082903
PN=56
Planetary Drive and Wheel Hub
10
11
NOTE: When installing, pay attention to the marks made
prior to removal.
LX1031391
–UN–03JUL03
4. Install the planetary gear and needle bearing with the
rounded edge (see arrow) facing downward.
LX24603,000030A –19–01JUN03–3/11
LX1031389
–UN–03JUL03
5. Install snap ring and check that it is seated correctly.
LX24603,000030A –19–01JUN03–4/11
Reconditioning the planetary gears (740, 745 and 750)
–UN–09AUG02
NOTE: Mark position of planetary gears and tapered
roller bearings so they can be re-installed
properly.
LX1029918
1. Remove the snap ring.
Continued on next page
CTM4820 (01JUL03)
10-11
LX24603,000030A –19–01JUN03–5/11
Front-Wheel Drive Axles
082903
PN=57
Planetary Drive and Wheel Hub
–UN–09AUG02
NOTE: Place the extraction tool only on the face of the
planetary gear. If the extraction tool is placed too
low, damage to the cage of the bottom tapered
roller bearing will occur!
2. Pull off planetary gear.
LX1029919
3. Remove bottom tapered roller bearing.
4. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000030A –19–01JUN03–6/11
NOTE: When installing, pay attention to the marks made
prior to removal.
–UN–20AUG02
5. Install tapered roller bearing (A) with rounded edge
(see arrow) facing downward.
LX1030119
6. Install planetary gear (B) with the writing facing
upward.
7. Install top tapered roller bearing (C).
LX24603,000030A –19–01JUN03–7/11
–UN–09AUG02
8. Install snap ring and check that it is seated correctly.
LX1030120
10
12
Continued on next page
CTM4820 (01JUL03)
10-12
LX24603,000030A –19–01JUN03–8/11
Front-Wheel Drive Axles
082903
PN=58
Planetary Drive and Wheel Hub
10
13
Reconditioning the hollow ring gear
1. Remove snap ring (A).
–UN–09AUG02
2. Remove flange (B) from hollow ring gear.
LX1030121
3. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000030A –19–01JUN03–9/11
LX1030122
–UN–09AUG02
4. Position flange (A) in hollow ring gear.
LX24603,000030A –19–01JUN03–10/11
5. Install snap ring (A).
LX1029087
–UN–12AUG02
6. Install planetary drive, see reference “Planetary Drive
Installation (Without Multi-Disk Brake)” in this Group.
LX24603,000030A –19–01JUN03–11/11
CTM4820 (01JUL03)
10-13
Front-Wheel Drive Axles
082903
PN=59
Planetary Drive and Wheel Hub
Planetary Drive Installation (Without
Multi-Disk Brake)
–UN–12AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030123
Installing the hollow ring gear
NOTE: Thoroughly remove old thread lock from holes and
screws.
1. Install hollow ring gear.
LX24603,000030B –19–01JUN03–1/5
2. Apply LOCTITE 243 (L41475) to the threads.
–UN–12AUG02
3. Install cap screws, tighten them cross-wise and while
doing so turn the hub several times in both directions.
LX1030124
Specification
Cap screws—Torque ............................................................. 68 to 75 N•m
50 to 55 lb-ft
LOCTITE is a registered trademark of the Loctite Corporation
LX24603,000030B –19–01JUN03–2/5
Installing the planetary carrier
–UN–12AUG02
1. Apply oil to O-ring (A) and insert it into groove (B).
LX1030126
10
14
Continued on next page
CTM4820 (01JUL03)
10-14
LX24603,000030B –19–01JUN03–3/5
Front-Wheel Drive Axles
082903
PN=60
Planetary Drive and Wheel Hub
10
15
2. Install planetary carrier.
LX1030127
Specification
Screws—Torque .................................................................... 40 to 50 N•m
30 to 36 lb-ft
–UN–12AUG02
3. Install screws (A).
LX24603,000030B –19–01JUN03–4/5
NOTE: To fill in oil, see reference “Planetary Drive - Fill
with Oil” in this Group.
LX1030128
Specification
Screw plug—Torque ....................................................................... 90 N•m
66 lb-ft
–UN–12AUG02
4. Install screw plug with new O-ring.
LX24603,000030B –19–01JUN03–5/5
CTM4820 (01JUL03)
10-15
Front-Wheel Drive Axles
082903
PN=61
Planetary Drive and Wheel Hub
–UN–30JUL03
Planetary Drive and Multi-Disk Brake—Exploded View
LX1031392
10
16
Continued on next page
CTM4820 (01JUL03)
10-16
LX24603,000030C –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=62
Planetary Drive and Wheel Hub
A—Vent screw, multi-disk
brake
B—O-ring
C—Snap ring
D—Flange
E—Hollow ring gear
F—Back-up ring
G—O-ring
H—Piston
I—Spring (3 used)
J—Special screw (3 used)
K—Back-up ring
L—O-ring
M—Cap screws (12 used)
N—Externally splined disk
O—Internally splined disk
P—Externally splined disk
Q—Snap ring
R—Snap ring
10
17
S—Tapered roller bearing1, 2
T—Planetary gear (31 or 42
used)
U—Tapered roller bearing1, 2
V—Planetary carrier
W—Snap ring
X—Planetary gear3 (4 used),
with needle bearing
1
On 740 and 745
2
On 750
3
On 733
LX24603,000030C –19–01JUN03–2/2
Planetary Drive and Multi-Disk Brake
Removal
–UN–09AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1029913
Removing the planetary carrier
1. Remove screw plug and drain oil.
LX24603,000030D –19–01JUN03–1/10
LX1029914
–UN–09AUG02
2. Take out screws (A).
Continued on next page
CTM4820 (01JUL03)
10-17
LX24603,000030D –19–01JUN03–2/10
Front-Wheel Drive Axles
082903
PN=63
Planetary Drive and Wheel Hub
NOTE: Using a screwdriver at the grooves provided, pry
planetary carrier off the wheel hub.
LX1029915
–UN–09AUG02
3. Remove planetary carrier (A).
LX24603,000030D –19–01JUN03–3/10
Removing the multi-disk brake
LX1030133
–UN–12AUG02
1. Remove the snap ring.
LX24603,000030D –19–01JUN03–4/10
NOTE: Pay attention to the sequence and position of the
disks.
LX1030134
–UN–12AUG02
2. Remove disk pack.
LX24603,000030D –19–01JUN03–5/10
–UN–12AUG02
3. Remove the three special screws (A) and the springs
of the brake piston.
LX1030135
10
18
Continued on next page
CTM4820 (01JUL03)
10-18
LX24603,000030D –19–01JUN03–6/10
Front-Wheel Drive Axles
082903
PN=64
Planetary Drive and Wheel Hub
10
19
LX1030136
–UN–12AUG02
4. Carefully push out the brake piston by applying
compressed to the brake oil channel. Secure the brake
piston to keep it from dropping and getting damaged.
LX24603,000030D –19–01JUN03–7/10
5. Remove brake piston.
LX1030137
NOTE: Install multi-disk brake, see reference “Planetary
Drive and Multi-Disk Brake Installation” in this
Group.
–UN–12AUG02
6. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000030D –19–01JUN03–8/10
Removing the hollow ring gear
–UN–09AUG02
NOTE: Cap screws are installed with L41475 thread lock
(LOCTITE 243).
LX1029916
1. Take out cap screws.
LOCTITE is a registered trademark of the Loctite Corporation
LX24603,000030D –19–01JUN03–9/10
2. Remove hollow ring gear by using two M8 x 100 mm
screws.
LX1031395
3. Recondition the planetary drive, see reference
“Planetary Drive Reconditioning (With Multi-Disk
Brake)” in this Group.
–UN–03JUL03
NOTE: Pay attention to the O-ring of the brake oil
channel between the hollow ring gear and the
knuckle housing.
LX24603,000030D –19–01JUN03–10/10
CTM4820 (01JUL03)
10-19
Front-Wheel Drive Axles
082903
PN=65
Planetary Drive and Wheel Hub
Planetary Drive Reconditioning (With
Multi-Disk Brake)
–UN–03JUL03
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1031389
NOTE: Remove planetary carrier and hollow ring gear,
see reference “Planetary Drive and Multi-Disk
Brake Removal” in this Group.
Reconditioning the planetary gears (733)
NOTE: Mark position of planetary gears and needle
bearings so they can be re-installed properly.
1. Remove the snap ring.
LX24603,000030E –19–01JUN03–1/9
2. Pull off planetary gear together with its needle bearing.
–UN–03JUL03
NOTE: The needle bearing is secured to the planetary
gear by a snap ring and cannot be taken off on its
own. If either the planetary gear or needle bearing
need to be replaced, they must be replaced
together as a matching set.
LX1031390
3. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000030E –19–01JUN03–2/9
NOTE: When installing, pay attention to the marks made
prior to removal.
–UN–03JUL03
4. Install the planetary gear and needle bearing with the
rounded edge (see arrow) facing downward.
LX1031391
10
20
Continued on next page
CTM4820 (01JUL03)
10-20
LX24603,000030E –19–01JUN03–3/9
Front-Wheel Drive Axles
082903
PN=66
Planetary Drive and Wheel Hub
10
21
LX1031389
–UN–03JUL03
5. Install snap ring and check that it is seated correctly.
LX24603,000030E –19–01JUN03–4/9
Reconditioning the planetary gears (740, 745 and 750)
–UN–09AUG02
NOTE: Mark position of planetary gears and tapered
roller bearings so they can be re-installed
properly.
LX1029918
1. Remove snap rings.
LX24603,000030E –19–01JUN03–5/9
–UN–09AUG02
NOTE: Place the extraction tool only on the face of the
planetary gear. If the extraction tool is placed too
low, damage to the cage of the bottom tapered
roller bearing will occur!
2. Pull off planetary gear.
LX1029919
3. Remove bottom tapered roller bearing.
4. Clean the various parts, inspect them for wear or
damage and replace as necessary.
Continued on next page
CTM4820 (01JUL03)
10-21
LX24603,000030E –19–01JUN03–6/9
Front-Wheel Drive Axles
082903
PN=67
Planetary Drive and Wheel Hub
NOTE: When installing, pay attention to the marks made
prior to removal.
–UN–20AUG02
5. Install tapered roller bearing (A) with rounded edge
(see arrow) facing downward.
LX1030119
6. Install planetary gear (B) with the writing facing
upward.
7. Install top tapered roller bearing (C).
LX24603,000030E –19–01JUN03–7/9
LX1030120
–UN–09AUG02
8. Install snap ring and check that it is seated correctly.
LX24603,000030E –19–01JUN03–8/9
Reconditioning the hollow ring gear
1. Remove snap ring (A).
–UN–12AUG02
2. Remove flange (B) from hollow ring gear.
IMPORTANT: Thoroughly examine the sliding and
sealing surfaces of the brake piston
inside the flange.
LX1030130
10
22
3. Clean the various parts, inspect them for wear or
damage and replace as necessary.
4. Position flange (B) in hollow ring gear.
5. Install snap ring (A).
6. Install planetary drive, see reference “Planetary Drive
and Multi-Disk Brake Installation” in this Group.
LX24603,000030E –19–01JUN03–9/9
CTM4820 (01JUL03)
10-22
Front-Wheel Drive Axles
082903
PN=68
Planetary Drive and Wheel Hub
Planetary Drive and Multi-Disk Brake
Installation
10
23
–UN–28OCT02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030138
Installing the hollow ring gear
1. Coat a new O-ring (A) with a little grease, and install.
LX24603,000030F –19–01JUN03–1/11
–UN–12AUG02
IMPORTANT: Make sure parts are correctly installed.
The brake oil channels on the knuckle
housing and on the flange of the hollow
ring gear must be aligned.
NOTE: Thoroughly remove old thread lock from holes and
screws.
LX1030123
2. Install hollow ring gear. Make sure that the O-ring is
installed correctly.
LX24603,000030F –19–01JUN03–2/11
3. Apply LOCTITE 243 (L41475) to the threads.
–UN–12AUG02
4. Install the screws, tighten them cross-wise and while
doing so turn the hub several times in both directions.
LX1030124
Specification
Screws—Torque .................................................................... 68 to 75 N•m
50 to 55 lb-ft
LOCTITE is a registered trademark of the Loctite Corporation
CTM4820 (01JUL03)
Continued on next page
10-23
LX24603,000030F –19–01JUN03–3/11
Front-Wheel Drive Axles
082903
PN=69
Planetary Drive and Wheel Hub
Installing the multi-disk brake
1. Install new O-rings and back-up rings on brake piston:
–UN–12AUG02
a. Apply a thin coat of oil to O-rings (A and B) and
install them.
LX1030139
b. Apply a thin coat of oil to back-up rings (C and D)
and install them so that the rounded (concave) side
faces the O-rings (see drawing).
LX1030140
–UN–24OCT02
A—O-ring
B—O-ring
C—Back-up ring
D—Back-up ring
E—Brake piston
LX24603,000030F –19–01JUN03–4/11
2. Position brake piston so that the holes the in flange of
hollow ring gear and the piston are aligned, then insert
the brake piston.
–UN–12AUG02
3. Using a plastic hammer, drive the brake piston in
carefully and evenly.
LX1030141
10
24
Continued on next page
CTM4820 (01JUL03)
10-24
LX24603,000030F –19–01JUN03–5/11
Front-Wheel Drive Axles
082903
PN=70
Planetary Drive and Wheel Hub
10
25
4. Place springs (A) on special screws (B).
–UN–12AUG02
NOTE: Apply a thin coat of thread lock to the special
screws only, otherwise excess thread lock may be
forced into the piston chamber.
LX1030142
5. Coat special screw threads with LOCTITE 2431
(L41475).
6. Install special screws and tighten them evenly.
Specification
Special screws—Torque........................................................ 10 to 15 N•m
7.5 to 11 lb-ft
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
Continued on next page
CTM4820 (01JUL03)
10-25
LX24603,000030F –19–01JUN03–6/11
Front-Wheel Drive Axles
082903
PN=71
Planetary Drive and Wheel Hub
–UN–12AUG02
NOTE: Position the externally splined disks so that the
gaps (A; if equipped) in the teeth are aligned with
the holes (B) on the outer circumference of the
hollow ring gear.
Position the internally splined disks so that the
teardrop holes (C; if present) are aligned.
LX1030143
7. Apply a thin coat of oil to the brake disks and install
them.
a. On 733: Start installing disks with an externally
splined one. Then alternately install one internally
and one externally splined disk (see illustration).
–UN–30JUL03
b. On 740, 745 and 750: Start installing disks with the
thin, externally splined disk. Then alternately install
one internally and one externally splined disk (see
illustration).
LX1033136
A—Gap
B—Hole
C—Teardrop hole
D—Thin, externally splined disk
E—Internally splined disk
F—Externally splined disk
G—Snap ring
LX1030240
–UN–24OCT02
Disk arrangement on 733
Disk arrangement on 740, 745 and 750
LX24603,000030F –19–01JUN03–7/11
8. Install snap ring (A).
–UN–13AUG02
9. Check for leaks at the brake, see reference “Check
Multi-Disk Brake for Leaks” in this Group.
LX1030144
10
26
Continued on next page
CTM4820 (01JUL03)
10-26
LX24603,000030F –19–01JUN03–8/11
Front-Wheel Drive Axles
082903
PN=72
Planetary Drive and Wheel Hub
10
27
Installing the planetary carrier
1. Apply oil to O-ring (A) and insert it into groove.
LX1030131
–UN–13AUG02
2. Position planetary carrier (B).
LX24603,000030F –19–01JUN03–9/11
3. Install screws (A).
LX1030127
–UN–12AUG02
Specification
Screws—Torque .................................................................... 40 to 50 N•m
30 to 36 lb-ft
LX24603,000030F –19–01JUN03–10/11
NOTE: To fill in oil, see reference “Planetary Drive - Fill
with Oil” in this Group.
LX1030128
Specification
Screw plug—Torque ....................................................................... 90 N•m
66 lb-ft
–UN–12AUG02
4. Install screw plug with new O-ring.
LX24603,000030F –19–01JUN03–11/11
CTM4820 (01JUL03)
10-27
Front-Wheel Drive Axles
082903
PN=73
Planetary Drive and Wheel Hub
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
NOTE: Fill hand pump with clean transmission/hydraulic
oil.
–UN–13AUG02
Check Multi-Disk Brake for Leaks
LX1030145
10
28
1. Connect hand pump.
2. Bleed brake hydraulic system and operate for at least
ten times.
3. Check for leaks: Build up test pressure, then close
shut-off valve between hand pump and pressure
gauge.
Specification
Brake—Test pressure.................................................................. 5000 kPa
50 bar
725 psi
Brake—Drop in pressure ....................................... 0.0 kPa over 3 minutes
0.0 bar over 3 minutes
0.0 psi over 3 minutes
LX24603,0000233 –19–01JUN03–1/1
CTM4820 (01JUL03)
10-28
Front-Wheel Drive Axles
082903
PN=74
Planetary Drive and Wheel Hub
Planetary Drive - Fill With Oil
IMPORTANT: Exclusively use oil types specified in
the relevant tractor Technical Manual.
Refer to "Front Wheel Drive Axle Oil"
and "Capacities" in Technical Manual
"Repair", Section 10, Group 05.
LX1030159
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
–UN–13AUG02
10
29
1. Axle must be in horizontal position.
2. Plug (A) must be in the position shown.
3. Fill with oil until the level comes up to the lower edge
of plug bore (A).
4. Install screw plug with new O-ring.
Specification
Screw plug—Torque ....................................................................... 90 N•m
66 lb-ft
LX24603,0000310 –19–01JUL02–1/1
CTM4820 (01JUL03)
10-29
Front-Wheel Drive Axles
082903
PN=75
Planetary Drive and Wheel Hub
–UN–24OCT02
Wheel Hub - Exploded View
LX1030146
10
30
A—Seal ring
B—Tapered roller bearing
cone
C—Tapered roller bearing cup
D—Wheel hub
E—O-ring
F—Wheel bolt (81 or 102 used)
1
On 730 and 733
2
On 740, 745 and 750
LX24603,0000311 –19–01JUN03–1/1
CTM4820 (01JUL03)
10-30
Front-Wheel Drive Axles
082903
PN=76
Planetary Drive and Wheel Hub
Remove Wheel Hub
10
31
–UN–13AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030147
NOTE: Remove planetary drive, see reference “Planetary
Drive Removal (Without Multi-Disk Brake)” or
“Planetary Drive and Multi-Disk Brake Removal” in
this Group.
1. Using a plastic hammer, evenly drive out the wheel
hub only until the tapered roller bearing cone (A) is
released.
LX24603,0000312 –19–01JUN03–1/4
LX1030148
–UN–13AUG02
2. Remove tapered roller bearing cone.
LX24603,0000312 –19–01JUN03–2/4
LX1030149
–UN–13AUG02
3. Remove wheel hub.
Continued on next page
CTM4820 (01JUL03)
10-31
LX24603,0000312 –19–01JUN03–3/4
Front-Wheel Drive Axles
082903
PN=77
Planetary Drive and Wheel Hub
4. On 730 and 733: Remove tapered roller bearing cone.
LX1032217
–UN–03JUL03
5. Recondition the wheel hub, see reference “Recondition
the Wheel Hub” in this Group.
LX24603,0000312 –19–01JUN03–4/4
Recondition the Wheel Hub
–UN–13AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030150
NOTE: Remove wheel hub, see reference “Remove
Wheel Hub” in this Group.
1. Remove seal ring.
LX24603,0000313 –19–01JUN03–1/7
LX1030151
–UN–13AUG02
2. On 740, 745 and 750: Remove tapered roller bearing
cone.
LX24603,0000313 –19–01JUN03–2/7
3. Remove tapered roller bearing cups.
–UN–13AUG02
4. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX1030152
10
32
Continued on next page
CTM4820 (01JUL03)
10-32
LX24603,0000313 –19–01JUN03–3/7
Front-Wheel Drive Axles
082903
PN=78
Planetary Drive and Wheel Hub
10
33
LX1030153
–UN–13AUG02
5. Carefully and evenly drive the tapered roller bearing
cups (A and B) in as far as they will go.
LX24603,0000313 –19–01JUN03–4/7
LX1032218
–UN–03JUL03
6. On 730 and 733: Drive in tapered rolled bearing cone
(A) as far as it will go.
LX24603,0000313 –19–01JUN03–5/7
NOTE: Make sure parts are correctly installed.
LX1030151
–UN–13AUG02
7. On 740, 745 and 750: Install the tapered roller bearing
cone.
Continued on next page
CTM4820 (01JUL03)
10-33
LX24603,0000313 –19–01JUN03–6/7
Front-Wheel Drive Axles
082903
PN=79
Planetary Drive and Wheel Hub
8. Apply a thin coat of oil to the outside of the seal ring
and place it on special tool KJD10279 (A) with the
open side facing away from the tool.
–UN–13AUG02
9. Use the special tool to install the seal ring.
LX1030157
a. On 730 and 733: Evenly drive the seal ring in as far
as it will go. The seal ring is seated properly when
there is an all-round gap of approx. 6 mm (0.236
in.) between the special tool and the hub (see
drawing A).
b. On 740, 745 and 750: Drive the seal ring in until the
special tool is touching the hub; there should be no
gap between the tool and the hub (see drawing B).
LX1033154
–UN–29JUL03
10. Install wheel hub, see reference “Installing the Wheel
Hub” in this Group.
LX24603,0000313 –19–01JUN03–7/7
Installing the Wheel Hub
–UN–13AUG02
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
NOTE: Before installing the wheel hub, apply a thin coat
of oil (not grease) to the lips of the seal and the
sealing surfaces of the knuckle housing.
LX1030149
10
34
1. Install wheel hub.
Continued on next page
CTM4820 (01JUL03)
10-34
LX24603,0000314 –19–01JUL02–1/2
Front-Wheel Drive Axles
082903
PN=80
Planetary Drive and Wheel Hub
10
35
2. Install the tapered roller bearing cone.
LX1030148
–UN–13AUG02
3. Install hollow ring gear, see "Planetary Drive
Installation (Without Multi-Disk Brake)" or "Planetary
Drive and Multi-Disk Brake Installation" in this Group.
LX24603,0000314 –19–01JUL02–2/2
CTM4820 (01JUL03)
10-35
Front-Wheel Drive Axles
082903
PN=81
Planetary Drive and Wheel Hub
10
36
CTM4820 (01JUL03)
10-36
Front-Wheel Drive Axles
082903
PN=82
Group 15
Knuckle Housing and Drive Shafts
Special or Essential Tools
15
1
NOTE: Order tools according to information given in the
U.S. SERVICEGARD Catalog or European
Microfiche Tool Catalog (MTC).
SERVICEGARD is a trademark of Deere & Company
LX24603,000033A –19–01JUN03–1/11
KJD10421 –UN–05AUG03
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10421
Installing oil seal in knuckle housing (730, 733)
LX24603,000033A –19–01JUN03–2/11
KJD10282 –UN–29OCT02
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10282
Installing oil seal in knuckle housing (740, 745, 750)
LX24603,000033A –19–01JUN03–3/11
OTC27488 –UN–10FEB95
Handle . . . . . . . . . . . . . . . . . . . . . . . . . OTC274881
Install the tapered roller bearing cup in the knuckle pin
bearing bores on the axle housing.
1
Part of tool kit D01045AA
LX24603,000033A –19–01JUN03–4/11
OTC27523 –UN–10FEB95
Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . OTC275231
Install the tapered roller bearing cup in the knuckle pin
bearing bores on the axle housing (730 and 733).
1
Part of tool kit D01045AA
Continued on next page
CTM4820 (01JUL03)
15-1
LX24603,000033A –19–01JUN03–5/11
Front-Wheel Drive Axles
082903
PN=83
Knuckle Housing and Drive Shafts
OTC27528 –UN–10FEB95
15
2
Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . OTC27528
1
Install the tapered roller bearing cup in the knuckle pin
bearing bores on the axle housing (740, 745 and 750).
1
Part of tool kit D01045AA
LX24603,000033A –19–01JUN03–6/11
KJD10422 –UN–05AUG03
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10422
Installing the seal ring on the king pin (730, 733).
LX24603,000033A –19–01JUN03–7/11
KJD10423 –UN–05AUG03
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10423
Installing the seal ring on the king pin (740, 745, 750).
LX24603,000033A –19–01JUN03–8/11
KJD10220 –UN–25MAR98
Bushing installer . . . . . . . . . . . . . . . . . . . . KJD10220
Installing bearing bushing of drive shaft in axle housing
LX24603,000033A –19–01JUN03–9/11
KJD10420 –UN–05AUG03
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10420
Installing seal ring of drive shaft in axle housing (730,
733).
LX24603,000033A –19–01JUN03–10/11
KJD10281 –UN–28OCT02
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10281
Installing seal ring of drive shaft in axle housing (740, 745,
750).
LX24603,000033A –19–01JUN03–11/11
CTM4820 (01JUL03)
15-2
Front-Wheel Drive Axles
082903
PN=84
Knuckle Housing and Drive Shafts
Other Material
15
3
Number
Name
Use
L81050 (U.S.)
MOLYKOTE G (U.S.)
Special grease
Installing king pins
L414751 (U.S.)
243 (LOCTITE)
Thread lock
Cap screws, installing king pins
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,0000345 –19–01JUN03–1/1
CTM4820 (01JUL03)
15-3
Front-Wheel Drive Axles
082903
PN=85
Knuckle Housing and Drive Shafts
15
4
Specifications
Item
Measurement
Specification
730, 733
Preload
0.5 to 0.6 mm
0.020 to 0.024 in.
740, 745, 750
Preload
0.7 to 0.8 mm
0.027 to 0.031 in.
730, 733
Torque
115 to 125 N•m
85 to 92 lb-ft
740, 745, 750
Torque
160 to 200 N•m
118 to 147 lb-ft
730, 733
Torque
200 to 220 N•m
148 to 162 lb-ft
740, 745, 750
Torque
350 to 390 N•m
258 to 287 lb-ft
Knuckle pin bearing
King pin to knuckle housing, cap
screws
Tie-rod to knuckle housing,
self-locking nut
LX24603,000033C –19–01JUN03–1/1
CTM4820 (01JUL03)
15-4
Front-Wheel Drive Axles
082903
PN=86
Knuckle Housing and Drive Shafts
Knuckle Housing and Drive Shaft - Sectional View
LX1032219
–UN–05AUG03
15
5
Knuckle housing, sectional view (750)
A—Axle housing
B—Shims (thickness as
required)
C—Threaded plug
D—King pin
E—Knuckle housing
F—Seal ring
G—Bushing
H—Tapered roller bearing
I—Thrust washer
J—Snap ring
K—Drive shaft
L—Ball bearing
M—Snap ring
Continued on next page
CTM4820 (01JUL03)
15-5
N—Seal ring
O—King pin
P—Seal ring
Q—Bushing
LX24603,0000317 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=87
Knuckle Housing and Drive Shafts
LX1033155
–UN–14AUG03
15
6
Knuckle housing, sectional view (750 with AutoTrac)
A—Axle housing
B—Shims (thickness as
required)
C—Steering angle sensor1
D—King pin1
E—Knuckle housing
F—Seal ring
G—Bushing
H—Tapered roller bearing
I—Thrust washer
J—Snap ring
K—Drive shaft
L—Ball bearing
M—Snap ring
N—Seal ring
O—King pin
P—Seal ring
Q—Bushing
1
With AutoTrac
LX24603,0000317 –19–01JUN03–2/2
CTM4820 (01JUL03)
15-6
Front-Wheel Drive Axles
082903
PN=88
Knuckle Housing and Drive Shafts
15
7
CTM4820 (01JUL03)
15-7
Front-Wheel Drive Axles
082903
PN=89
Knuckle Housing and Drive Shafts
–UN–14AUG03
Knuckle Housing and Drive Shaft - Exploded View
LX1032220
15
8
Continued on next page
CTM4820 (01JUL03)
15-8
LX24603,0000318 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=90
Knuckle Housing and Drive Shafts
1—Tapered roller bearing cup
2—Bushing
3—Seal ring
4—R.h. end of drive shaft
assembly
5—Seal ring
6—Snap ring
7—Ball bearing
8—King pin
9—Shims (thickness as
required)
10—Seal ring
11—Tapered roller bearing
cone
12—Knuckle housing
13—Thrust washer
14—Snap ring
15—Bushing1
16—Steering angle adjusting
screw
17—Shaft
18—U-joint assembly
19—Snap ring (4 used)
20—Pivot
15
9
21—Shaft
22—Bushing
23—Adapter2
24—King pin2
25—Shaft2
26—Adapter2
27—O-ring
28—Steering angle sensor2
1
Only if dimension (x) is 90 mm (3.5 in.) or more.
2
With AutoTrac
LX24603,0000318 –19–01JUN03–2/2
Remove Knuckle Housing
–UN–04FEB98
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1018418
NOTE: Remove wheel hub, see reference “Removing the
Wheel Hub” in Group 10.
1. Remove screw plug and drain oil.
LX24603,0000319 –19–01JUN03–1/8
LX1029079
–UN–06AUG02
2. Remove self-locking nut.
Continued on next page
CTM4820 (01JUL03)
15-9
LX24603,0000319 –19–01JUN03–2/8
Front-Wheel Drive Axles
082903
PN=91
Knuckle Housing and Drive Shafts
LX1029080
–UN–06AUG02
3. Press tie-rod out of knuckle housing.
LX24603,0000319 –19–01JUN03–3/8
LX1032221
–UN–04JUL03
4. Take threaded plug (A; if equipped) and the cap
screws out of the top of the king pin.
LX24603,0000319 –19–01JUN03–4/8
LX1032222
–UN–04JUL03
5. Take threaded plug (A; if equipped) and the cap
screws out of the bottom of the king pin.
LX24603,0000319 –19–01JUN03–5/8
–UN–14AUG03
NOTE: If the king pin is equipped with a steering angle
sensor, remove this sensor. See reference
“Knuckle Housing — Remove and Install the
Steering Angle Sensor” in this Group.
6. Remove top king pin (A) with shims (B), seal ring (C)
and tapered roller bearing cone (D).
LX1033157
15
10
Continued on next page
CTM4820 (01JUL03)
15-10
LX24603,0000319 –19–01JUN03–6/8
Front-Wheel Drive Axles
082903
PN=92
Knuckle Housing and Drive Shafts
15
11
LX1033158
–UN–14AUG03
7. Remove bottom king pin (A) with seal ring (B) and
tapered roller bearing cone (C).
LX24603,0000319 –19–01JUN03–7/8
NOTE: Carefully remove knuckle housing to avoid
damaging shaft seal ring in axle housing.
–UN–15AUG02
8. Remove knuckle housing assembly with drive shaft.
LX1030168
9. Recondition knuckle housing and king pin, see
reference “Recondition the Knuckle Housing and King
Pin” in this Group.
LX24603,0000319 –19–01JUN03–8/8
Recondition the Knuckle Housing and King
Pin
–UN–19AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030222
NOTE: Remove knuckle housing, see reference “Remove
Knuckle Housing” in this Group.
NOTE: Remove drive shaft, see reference “Removing the
Drive Shafts” in this Group.
Reconditioning the knuckle housing
1. Remove seal ring.
Continued on next page
CTM4820 (01JUL03)
15-11
LX24603,000031B –19–01JUN03–1/11
Front-Wheel Drive Axles
082903
PN=93
Knuckle Housing and Drive Shafts
2. Remove snap ring and ball bearing.
LX1030223
–UN–19AUG02
3. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000031B –19–01JUN03–2/11
LX1030224
–UN–19AUG02
4. Install the ball bearing.
LX24603,000031B –19–01JUN03–3/11
–UN–19AUG02
5. Install the snap ring.
LX1030223
15
12
Continued on next page
CTM4820 (01JUL03)
15-12
LX24603,000031B –19–01JUN03–4/11
Front-Wheel Drive Axles
082903
PN=94
Knuckle Housing and Drive Shafts
15
13
6. Place seal ring on special tool KJD104211 (A) or
KJD102822 with the lip of the seal facing away from the
tool.
–UN–19AUG02
7. Apply a thin coat of John Deere multi-purpose grease
to the outer side of the seal ring.
LX1030225
8. Install seal ring using seal installer (A).
1
On 730 and 733
2
On 740, 745 and 750
LX24603,000031B –19–01JUN03–5/11
Reconditioning the king pin
LX1032229
–UN–14AUG03
1. Remove tapered roller bearing cone.
LX24603,000031B –19–01JUN03–6/11
LX1032230
–UN–14AUG03
2. Remove seal ring and shield (A).
Continued on next page
CTM4820 (01JUL03)
15-13
LX24603,000031B –19–01JUN03–7/11
Front-Wheel Drive Axles
082903
PN=95
Knuckle Housing and Drive Shafts
3. Remove taper roller bearing cups (A) from pin bearing
bores of axle housing.
LX1030228
–UN–19AUG02
4. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000031B –19–01JUN03–8/11
–UN–04JUL03
5. Install tapered roller bearing cups in knuckle pin
bearing bores using special tools OTC27488 (A;
handle) and OTC275231 (B; disk) or OTC275282.
1
LX1032223
On 730 and 733
2
On 740, 745 and 750
LX24603,000031B –19–01JUN03–9/11
NOTE: If knuckle pin bearing components are ever
replaced with new components, preload must be
adjusted at the knuckle pin bearings. In this case,
install the seal ring on the top of the king pin only
after the adjustment has been made.
–UN–05AUG03
6. Using special tools KJD104221 (A) and KJD104232 (D),
carefully press seal rings (B) and (E) together with the
shield as far as they will go onto the top and bottom
king pins (C) and (F).
LX1032231
15
14
1
On 730 and 733
2
On 740, 745 and 750
Continued on next page
CTM4820 (01JUL03)
15-14
LX24603,000031B –19–01JUN03–10/11
Front-Wheel Drive Axles
082903
PN=96
Knuckle Housing and Drive Shafts
15
15
7. Install tapered roller bearing cone on the bottom king
pin.
LX1032229
–UN–14AUG03
8. Install drive shafts, see reference “Installing the Drive
Shafts” in this Group.
LX24603,000031B –19–01JUN03–11/11
Install Knuckle Housing
–UN–15AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030168
NOTE: Install drive shafts, see reference “Installing the
Drive Shafts” in this Group.
NOTE: Be careful not to damage shaft seal in axle
housing. Turn drive shaft during installation until
splines engage in differential.
1. Install knuckle housing assembly with drive shaft.
Continued on next page
CTM4820 (01JUL03)
15-15
LX24603,000031E –19–01JUN03–1/7
Front-Wheel Drive Axles
082903
PN=97
Knuckle Housing and Drive Shafts
NOTE: Cover area of king pin indicated by the arrow with
L81050 special grease (MOLYKOTE G).
–UN–14AUG03
NOTE: Coat tapered roller bearings and the knuckle pin
bearing hole with John Deere multi-purpose
grease.
LX1033159
2. Install bottom king pin (A) with seal ring (B) and
tapered roller bearing cone (C).
3. On the cap screws for the bottom king pin, coat the
threads with L41475 LOCTITE 2431 thread lock, then
install the screws.
Specification
730, 733—Torque ............................................................. 115 to 125 N•m
85 to 92 lb-ft
740, 745, 750—Torque ..................................................... 160 to 200 N•m
118 to 147 lb-ft
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,000031E –19–01JUN03–2/7
–UN–14AUG03
NOTE: If knuckle pin bearing components are ever
replaced with new components, preload must be
adjusted at the knuckle pin bearings, so see
reference “Knuckle Housing — Adjust the Preload
at the Knuckle Pin Bearings” in this Group.
NOTE: Coat tapered roller bearings and the knuckle pin
bearing hole with John Deere multi-purpose
grease.
LX1033134
15
16
4. Insert the tapered roller bearing cone at the top.
Continued on next page
CTM4820 (01JUL03)
15-16
LX24603,000031E –19–01JUN03–3/7
Front-Wheel Drive Axles
082903
PN=98
Knuckle Housing and Drive Shafts
15
17
NOTE: Cover area of king pin indicated by the arrow with
L81050 special grease (MOLYKOTE G).
LX1033135
–UN–14AUG03
5. Install top king pin (A) with shims (B) and seal ring (C).
LX24603,000031E –19–01JUN03–4/7
6. Coat cap screw threads with L41475 LOCTITE 2431
thread lock, then install the screws.
LX1030238
–UN–19AUG02
Specification
730, 733—Torque ............................................................. 115 to 125 N•m
85 to 92 lb-ft
740, 745, 750—Torque ..................................................... 160 to 200 N•m
118 to 147 lb-ft
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,000031E –19–01JUN03–5/7
NOTE: If the king pin is equipped with a steering angle
sensor, install this sensor. See reference “Knuckle
Housing — Remove and Install the Steering Angle
Sensor” in this Group.
LX1032224
–UN–04JUL03
7. Coat threaded plugs (A; if equipped) with LOCTITE
2431 (L41475), and install them on the top and bottom
king pins.
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
Continued on next page
CTM4820 (01JUL03)
15-17
LX24603,000031E –19–01JUN03–6/7
Front-Wheel Drive Axles
082903
PN=99
Knuckle Housing and Drive Shafts
Final assembly
Specification
730, 733—Torque ............................................................. 200 to 220 N•m
148 to 162 lb-ft
740, 745, 750—Torque ..................................................... 350 to 390 N•m
258 to 287 lb-ft
2. Fill axle housing with oil, see reference “Axle
Housing — Fill with Oil” in Group 20.
–UN–07AUG02
1. Using a new self-locking nut, install tie-rod to knuckle
housing.
LX1029907
15
18
3. Install steering angle adjusting screw and adjust
steering angle, see reference “Check and Adjust
Steering Angle” in Group 05.
4. Install wheel hub, see reference “Installing the Wheel
Hub” in Group 10.
LX24603,000031E –19–01JUN03–7/7
CTM4820 (01JUL03)
15-18
Front-Wheel Drive Axles
082903
PN=100
Knuckle Housing and Drive Shafts
15
19
CTM4820 (01JUL03)
15-19
Front-Wheel Drive Axles
082903
PN=101
Knuckle Housing and Drive Shafts
Knuckle Housing — Adjust the Preload at the
Knuckle Pin Bearings
–UN–04JUL03
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1032233
1. Without applying grease, insert the tapered roller
bearing cone at the top.
LX24603,0000339 –19–01JUN03–1/4
NOTE: A suitable number of shims should be added to
the top king pin in order to produce a measurable
amount of axial play.
–UN–04JUL03
2. Add shims (e.g. a to a total thickness of 2.0 mm) to the
top king pin.
LX1032234
3. Insert the top king pin.
LX24603,0000339 –19–01JUN03–2/4
4. First install the cap screws without applying any form
of thread lock.
–UN–04JUL03
Specification
730, 733—Torque ............................................................. 115 to 125 N•m
85 to 92 lb-ft
740, 745, 750—Torque ..................................................... 160 to 200 N•m
118 to 147 lb-ft
LX1032235
15
20
Continued on next page
CTM4820 (01JUL03)
15-20
LX24603,0000339 –19–01JUN03–3/4
Front-Wheel Drive Axles
082903
PN=102
Knuckle Housing and Drive Shafts
15
21
5. Install a dial gauge and measure axial play (b).
7. Calculate shim thickness (x).
LX1033133
Specification
730, 733—Preload................................................................ 0.5 to 0.6 mm
0.020 to 0.024 in.
740, 745, 750—Preload ....................................................... 0.7 to 0.8 mm
0.027 to 0.031 in.
–UN–04JUL03
6. Predefined dimension (c) of the preload at knuckle pin
bearings.
For example:
Dimension (a), shims required to produce play ....... 2.0 mm (0.079 in.)
Dimension (b), measured axial play ........................ 0.7 mm (0.028 in.)
Dimension (c), prescribed bearing preload .............. 0.8 mm (0.031 in.)
Formula: x = a - b - c
x = 2.0 mm - 0.7 mm - 0.8 mm = 0.5 mm
(x = 0.079 in. - 0.028 in. - 0.031 in. = 0.02 in.)
In this example, total shim thickness required is 0.5
mm (0.02 in.).
8. Take out the king pin again and remove shims (a).
9. Install the appropriate shim thickness (x) at the upper
king pin.
10. Return knuckle housing to its original state, see
reference “Install Knuckle Housing” in this Group.
LX24603,0000339 –19–01JUN03–4/4
CTM4820 (01JUL03)
15-21
Front-Wheel Drive Axles
082903
PN=103
Knuckle Housing and Drive Shafts
–UN–14AUG03
Knuckle Housing — Remove and Install the Steering Angle Sensor
LX1033156
15
22
A—Cap screws (2 used)
B—Cable protection
C—Steering angle sensor
D—O-ring
E—Adapter
F—Connecting rod
G—Cap screws (4 used)
H—King pin
CAUTION: Follow safety and repair
instructions, see reference “General Safety
and Repair Information” in Group 01.
I—Shims (thickness as
required)
J—Seal ring
Removing the steering angle sensor
1. Unplug the steering angle sensor.
Continued on next page
CTM4820 (01JUL03)
K—Tapered roller bearing
cone
L—Adapter
15-22
LX24603,0000236 –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=104
Knuckle Housing and Drive Shafts
2. Using the illustration as a guide, take off the
components as necessary.
15
23
3. Install components (K) to (H).
4. Coat the threads of cap screws (G) with L41475
LOCTITE 2431 thread lock, then install the screws.
3. Clean the various parts, inspect them for wear or
damage and replace as necessary.
Installing the steering angle sensor
1. Re-assemble the components in reverse order and
comply with the following points.
Specification
730, 733—Torque ....................................................... 115 to 125 N•m
85 to 92 lb-ft
740, 745, 750—Torque............................................... 160 to 200 N•m
118 to 147 lb-ft
5. Install connecting rod (F) correctly in the square
hole in adapter (L).
2. Install adapter (L) so that the two spigots sit
correctly in the holes in the axle housing.
6. Place adapter (E) on connecting rod (F) in such a
way that the flattened side of the hole that receives
the steering angle sensor’s pivot is facing inward
towards the center of the front-wheel drive axle
(see enlargement in illustration).
NOTE: Cover area of king pin indicated by the arrow
with L81050 special grease (MOLYKOTE G).
NOTE: Coat the tapered roller bearing with John
Deere multipurpose grease.
7. Align the steering angle sensor’s pivot (C) in
relation to the hole in adapter (E), and install.
NOTE: Install seal ring (J) on the king pin, see
reference “Recondition the Knuckle Housing
and King Pin” in this Group.
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,0000236 –19–01JUN03–2/2
Removing the Drive Shafts
–UN–15AUG02
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
LX1030219
NOTE: Remove knuckle housing, see "Removing the
Knuckle Housing" in this Group.
1. Remove drive shaft snap ring.
Continued on next page
CTM4820 (01JUL03)
15-23
LX24603,000031A –19–01JUL02–1/3
Front-Wheel Drive Axles
082903
PN=105
Knuckle Housing and Drive Shafts
LX1030220
–UN–15AUG02
2. Remove thrust washer (A).
LX24603,000031A –19–01JUL02–2/3
3. Remove the drive shaft.
LX1030221
–UN–19AUG02
4. Repair drive shaft, see “Repairing the Drive Shafts” in
this Group.
LX24603,000031A –19–01JUL02–3/3
Recondition the Drive Shafts
–UN–04FEB98
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
NOTE: Remove drive shaft, see reference “Removing the
Drive Shafts” in this Group.
LX1018358
15
24
Disassembling the drive shaft
1. Remove bushing (A) from drive shaft.
Continued on next page
CTM4820 (01JUL03)
15-24
LX24603,000031C –19–01JUN03–1/10
Front-Wheel Drive Axles
082903
PN=106
Knuckle Housing and Drive Shafts
15
25
LX1018359
–UN–04FEB98
2. Remove snap rings.
LX24603,000031C –19–01JUN03–2/10
3. Remove bushings (A).
LX1018360
–UN–04FEB98
4. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000031C –19–01JUN03–3/10
Assembling the drive shaft
LX1018375
–UN–04FEB98
1. Install U-joints and drive in bushings (A) by means of a
pin.
LX24603,000031C –19–01JUN03–4/10
LX1018359
–UN–04FEB98
2. Install the snap rings.
Continued on next page
CTM4820 (01JUL03)
15-25
LX24603,000031C –19–01JUN03–5/10
Front-Wheel Drive Axles
082903
PN=107
Knuckle Housing and Drive Shafts
LX1018377
–UN–10FEB98
3. Heat bushing (A) to 200°C (392°F), and install it on the
drive shaft as shown.
LX24603,000031C –19–01JUN03–6/10
Axle housing - removal of seal ring and bushing
LX1030234
–UN–20AUG02
1. Remove seal ring (A).
LX24603,000031C –19–01JUN03–7/10
LX1030235
–UN–20AUG02
2. Remove bushing (A).
LX24603,000031C –19–01JUN03–8/10
Axle housing - installation of seal ring and bushing
–UN–20AUG02
1. Using special tool KJD10220 (B), drive bushing (A) into
the axle housing as far as it will go.
LX1030239
15
26
Continued on next page
CTM4820 (01JUL03)
15-26
LX24603,000031C –19–01JUN03–9/10
Front-Wheel Drive Axles
082903
PN=108
Knuckle Housing and Drive Shafts
15
27
2. Place seal ring (A) on seal installer KJD104201 (B) or
KJD102812 with sealing lips facing away from tool.
–UN–20AUG02
3. Apply a thin coat of oil to the outside of the seal ring
and drive it in as far as it will go using the special tool.
LX1030236
4. After installation, cover the area between the lips with
John Deere multipurpose grease.
5. Install drive shaft, see reference “Installing the Drive
Shafts” in this Group.
1
On 730 and 733
2
On 740, 745 and 750
LX24603,000031C –19–01JUN03–10/10
Installing the Drive Shafts
–UN–19AUG02
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
LX1030237
1. Apply a thin coat of oil to the lips of the seal ring in the
knuckle housing.
2. Install drive shaft in knuckle housing.
LX24603,000031D –19–01JUL02–1/3
LX1030220
–UN–15AUG02
3. Install thrust washer (A).
Continued on next page
CTM4820 (01JUL03)
15-27
LX24603,000031D –19–01JUL02–2/3
Front-Wheel Drive Axles
082903
PN=109
Knuckle Housing and Drive Shafts
4. Install the snap ring.
–UN–15AUG02
5. Install knuckle housing, see "Installing the Knuckle
Housing" in this Group.
LX1030219
15
28
LX24603,000031D –19–01JUL02–3/3
CTM4820 (01JUL03)
15-28
Front-Wheel Drive Axles
082903
PN=110
Group 20
Axle Housing and Differential
Special or Essential Tools
20
1
NOTE: Order tools according to information given in the
U.S. SERVICEGARD Catalog or European
Microfiche Tool Catalog (MTC).
SERVICEGARD is a trademark of Deere & Company
LX24603,0000340 –19–01JUN03–1/5
KJD10223 –UN–25MAR98
Bushing installer . . . . . . . . . . . . . . . . . . . . KJD10223
Axle housing, installing the axle suspension bushing
LX24603,0000340 –19–01JUN03–2/5
KJD10290 –UN–05AUG03
Holding tool . . . . . . . . . . . . . . . . . . . . . . . .KJD10290
Slackening/tightening the hex. nut on drive flange
(front-wheel drive axles with TLS)
LX24603,0000340 –19–01JUN03–3/5
KJD10419 –UN–05AUG03
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10419
Axle housing, installing the seal ring of the bevel pinion
drive shaft (730, 733).
LX24603,0000340 –19–01JUN03–4/5
KJD10280 –UN–28OCT02
Seal installer . . . . . . . . . . . . . . . . . . . . . . .KJD10280
Axle housing, installing the seal ring of the bevel pinion
drive shaft (740, 745, 750).
LX24603,0000340 –19–01JUN03–5/5
CTM4820 (01JUL03)
20-1
Front-Wheel Drive Axles
082903
PN=111
Axle Housing and Differential
20
2
Other Material
Number
Name
Use
L41476 (U.S.)
270 (LOCTITE)
Thread lock
Cap screws, assembly of axle
housing
L414751 (U.S.)
243 (LOCTITE)
Thread lock
Fillister-head screws, ring gear on
differential housing
L81050 (U.S.)
MOLYKOTE G (U.S.)
Special grease
Install drive flange
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,0000346 –19–01JUN03–1/1
CTM4820 (01JUL03)
20-2
Front-Wheel Drive Axles
082903
PN=112
Axle Housing and Differential
Specifications
20
3
Item
Measurement
Specification
Assembly of axle housing, cap
screws
Torque
200 to 220 N•m
148 to 162 lb-ft
Drive flange on bevel pinion drive
shaft, hex. nut
Torque
245 N•m
180 lb-ft
Bevel pinion drive shaft
Rolling drag torque
2 to 2.5 N•m
1.47 to 1.84 lb-ft
Ring gear to differential housing,
fillister-head screws
Torque
104 to 128 N•m
77 to 94 lb-ft
Differential, taper roller bearings
Preload
0.05 to 0.10 mm
0.002 to 0.004 in.
730 and 733
Play
0.27 to 0.35 mm
0.0106 to 0.0138 in.
740
Play
0.25 to 0.33 mm
0.0098 to 0.0130 in.
745 and 750
Play
0.22 to 0.28 mm
0.0087 to 0.0110 in.
Torque
90 N•m
66 lb-ft
Ring gear, backlash:
Axle housing, screw plug
LX24603,0000342 –19–01JUN03–1/1
CTM4820 (01JUL03)
20-3
Front-Wheel Drive Axles
082903
PN=113
Axle Housing and Differential
–UN–07AUG03
Differential — Sectional View
LX1033137
20
4
Differential, 730 and 733 without TLS
A—Axle housing
B—Shims (thickness as
required)
C—Disk pack
D—Thrust washer
E—Differential housing
F—Bevel pinion (2 used)
G—Thrust washer (2 used)
H—Drive bevel gear (2 used)
I—Axle housing
J—Ring gear
K—Bevel pinion drive shaft
L—Drive flange
M—Shims (thickness as
required)
Continued on next page
CTM4820 (01JUL03)
20-4
N—Seal ring
O—O-ring
P—Shims (thickness as
required)
LX24603,000033D –19–01JUN03–1/4
Front-Wheel Drive Axles
082903
PN=114
Axle Housing and Differential
LX1030488
–UN–29OCT02
20
5
Differential, 740, 745 and 750 without TLS
A—Axle housing
B—Shims (thickness as
required)
C—Disk pack
D—Thrust washer
E—Differential housing
F—Bevel pinion (4 used)
G—Thrust washer (4 used)
H—Drive bevel gear (2 used)
I—Axle housing
J—Ring gear
K—Bevel pinion drive shaft
L—Drive flange
M—Shims (thickness as
required)
N—Seal ring
O—O-ring
P—Shims (thickness as
required)
NOTE: On 740 axles, the axle housings and
differential are transposed (mirror-image).
Continued on next page
CTM4820 (01JUL03)
20-5
LX24603,000033D –19–01JUN03–2/4
Front-Wheel Drive Axles
082903
PN=115
Axle Housing and Differential
LX1033138
–UN–07AUG03
20
6
Differential, 730 and 733 with TLS
A—Axle housing
B—Shims (thickness as
required)
C—Disk pack
D—Thrust washer
E—Differential housing
F—Bevel pinion (2 used)
G—Thrust washer (2 used)
H—Drive bevel gear (2 used)
I—Axle housing
J—Ring gear
K—Bevel pinion drive shaft
L—Drive flange
M—Shims (thickness as
required)
Continued on next page
CTM4820 (01JUL03)
20-6
N—Seal ring
O—O-ring
P—Shims (thickness as
required)
LX24603,000033D –19–01JUN03–3/4
Front-Wheel Drive Axles
082903
PN=116
Axle Housing and Differential
LX1030489
–UN–24OCT02
20
7
Differential, 740, 745 and 750 with TLS
A—Axle housing
B—Shims (thickness as
required)
C—Disk pack
D—Thrust washer
E—Differential housing
F—Bevel pinion (4 used)
G—Thrust washer (4 used)
H—Drive bevel gear (2 used)
I—Axle housing
J—Ring gear
K—Bevel pinion drive shaft
L—Drive flange
M—Shims (thickness as
required)
N—Seal ring
O—O-ring
P—Shims (thickness as
required)
NOTE: On 740 axles, the axle housings and
differential are transposed (mirror-image).
LX24603,000033D –19–01JUN03–4/4
CTM4820 (01JUL03)
20-7
Front-Wheel Drive Axles
082903
PN=117
Axle Housing and Differential
–UN–05AUG03
Differential — Exploded View
LX1033139
20
8
Differential on 730 and 733
A—Tapered roller bearing
cone
B—Fillister-head screw (16
used)
C—Ring gear
D—Differential housing
E—Externally splined disk (4
used)
F—Internally splined disk (3
used)
G—Thrust washer
H—Drive bevel gear
I—Thrust washer (2 used)
J—Bevel pinion (2 used)
K—Shaft
Continued on next page
CTM4820 (01JUL03)
20-8
L—Spring pin
M—Differential housing
N—Tapered roller bearing
cone
LX24603,000033E –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=118
Axle Housing and Differential
LX1033140
–UN–05AUG03
20
9
Differential, 740, 745 and 750
A—Tapered roller bearing
cone
B—Fillister-head screw (16
used)
C—Ring gear
D—Differential housing
E—Externally splined disk (4
used)
F—Internally splined disk (3
used)
G—Thrust washer
H—Drive bevel gear
I—Thrust washer (4 used)
J—Bevel pinion (4 used)
K—Shaft (2 used)
L—Differential housing
M—Tapered roller bearing
cone
NOTE: On 740 axles, the differential is transposed
(mirror-image).
LX24603,000033E –19–01JUN03–2/2
CTM4820 (01JUL03)
20-9
Front-Wheel Drive Axles
082903
PN=119
Axle Housing and Differential
–UN–05AUG03
Axle Housing - Exploded View
LX1033141
20
10
Without TLS
A—L.h. half of axle housing
B—Screw plug
C—Shims (thickness as
required)
D—Tapered roller bearing cup
E—Bushing
F—Differential assembly
G—R.h. half of axle housing
H—O-ring
I—Bevel pinion drive shaft
J—Tapered roller bearing cone
K—Tapered roller bearing cup
L—Shims (thickness as
required)
M—Tapered roller bearing cup
N—Tapered roller bearing
cone
O—Seal ring
P—O-ring
Q—Drive flange
R—Shims (thickness as
required)
S—Washer
T—Self-locking hex. nut
NOTE: 730, 733 and 740 axles have the axle housing
and differential transposed (mirror-image).
Continued on next page
CTM4820 (01JUL03)
20-10
LX24603,000033F –19–01JUN03–1/2
Front-Wheel Drive Axles
082903
PN=120
Axle Housing and Differential
LX1033142
–UN–05AUG03
20
11
With TLS
A—L.h. half of axle housing
B—Stop
C—Screw plug
D—Shims (thickness as
required)
E—Tapered roller bearing cup
F—Differential assembly
G—R.h. half of axle housing
H—O-ring
I—Bevel pinion drive shaft
J—Tapered roller bearing cone
K—Tapered roller bearing cup
L—Shims (thickness as
required)
M—Tapered roller bearing cup
N—Tapered roller bearing
cone
O—Seal ring
P—O-ring
Q—Drive flange
R—Shims (thickness as
required)
S—Washer
T—Self-locking hex. nut
NOTE: 730, 733 and 740 axles have the axle housing
and differential transposed (mirror-image).
LX24603,000033F –19–01JUN03–2/2
CTM4820 (01JUL03)
20-11
Front-Wheel Drive Axles
082903
PN=121
Axle Housing and Differential
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
LX1018418
NOTE: Remove tie rods and king pins, see "Removing
the Knuckle Housing" in Group 15.
–UN–04FEB98
Removing the Axle Housing
1. Remove screw plug and drain oil.
LX24603,0000329 –19–01JUL02–1/3
2. Remove top and bottom king pins.
–UN–20AUG02
NOTE: Carefully remove drive output assembly to avoid
damaging shaft seal ring in axle housing.
LX1030132
3. Remove planetary drive, wheel hub and knuckle
housing with drive shaft.
LX24603,0000329 –19–01JUL02–2/3
4. Remove cap screws.
6. Repair axle housing. See “Repairing the Axle Housing”
in this Group.
–UN–20AUG02
5. Separate axle housings.
LX1030154
20
12
LX24603,0000329 –19–01JUL02–3/3
CTM4820 (01JUL03)
20-12
Front-Wheel Drive Axles
082903
PN=122
Axle Housing and Differential
Repairing the Axle Housing
NOTE: Remove axle housing, see "Removing the Axle
Housing" in this Group.
1. Remove and install bearing and seal rings from axle
housing yoke:
LX1018467
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
–UN–04FEB98
20
13
See “Repairing the Knuckle Housing and the King Pin”
and “Repairing the Drive Shafts” in Group 15.
2. Removal and installation of bevel pinion drive shaft:
See "Removing the Bevel Pinion Drive Shaft" and
"Installing the Bevel Pinion Drive Shaft" in this Group.
3. Remove and install differential:
See "Removing the Differential" and "Installing the
Differential" in this Group.
4. Removal and installation of steering cylinder:
See "Removing the Steering Cylinder" and "Installing
the Tie Rods" in Group 05.
5. Using special tool KJD10223 (A), install the axle
suspension bushings1 in such a way that the hole (see
arrow) is aligned with the grease fitting.
6. Install axle housing, see "Installing the Axle Housing"
in this Group.
1
on axles without TLS
LX24603,000032A –19–01JUL02–1/1
CTM4820 (01JUL03)
20-13
Front-Wheel Drive Axles
082903
PN=123
Axle Housing and Differential
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
LX1030155
1. Apply oil to O-ring (A) and install it.
–UN–20AUG02
Installing the Axle Housing
LX24603,000032B –19–01JUN03–1/3
2. Join the two halves of the axle housing together.
3. Coat cap screw threads with LOCTITE 270 (L41476).
LX1030156
Specification
Cap screws—Torque ......................................................... 200 to 220 N•m
148 to 162 lb-ft
–UN–20AUG02
4. Install cap screws.
LOCTITE is a registered trademark of the Loctite Corporation
LX24603,000032B –19–01JUN03–2/3
5. Install knuckle housing with drive shaft, wheel hub and
planetary drive, see "Installing the Knuckle Housing" in
Group 15.
6. Install tie rods, see "Installing the Tie Rods" in Group
05.
7. Fill with oil, see "Axle Housing - Fill with Oil" in this
Group.
–UN–20AUG02
NOTE: Be careful not to damage shaft seal in axle
housing. Turn drive shaft during installation until
splines engage in differential.
LX1030132
20
14
LX24603,000032B –19–01JUN03–3/3
CTM4820 (01JUL03)
20-14
Front-Wheel Drive Axles
082903
PN=124
Axle Housing and Differential
Remove the Bevel Pinion Drive Shaft
20
15
–UN–04FEB98
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1018427
NOTE: Remove axle housing, see reference “Removing
the Axle Housing” in this Group.
Remove differential, see reference “Removing the
Differential” in this Group.
Without TLS
NOTE: Keep hex. nut for later rolling drag torque
adjustment of the bevel pinion drive shaft.
1. Remove self-locking hex. nut and washer.
LX1030242
–UN–20AUG02
On front-wheel drive axles with TLS, use special tool
KJD10290 to loosen the hex. nut.
With TLS
LX24603,000032C –19–01JUN03–1/7
2. Remove shims (A) and keep them for later use.
LX1030243
–UN–20AUG02
3. Remove drive flange (B).
LX24603,000032C –19–01JUN03–2/7
NOTE: To prevent bevel pinion drive shaft from falling
out, hold shaft.
LX1030244
–UN–20AUG02
4. Remove bevel pinion drive shaft.
Continued on next page
CTM4820 (01JUL03)
20-15
LX24603,000032C –19–01JUN03–3/7
Front-Wheel Drive Axles
082903
PN=125
Axle Housing and Differential
LX1030245
–UN–20AUG02
5. Remove seal ring.
LX24603,000032C –19–01JUN03–4/7
LX1030246
–UN–20AUG02
6. Remove outer tapered roller bearing cone.
LX24603,000032C –19–01JUN03–5/7
LX1030247
–UN–20AUG02
7. Remove outer tapered roller bearing cup.
LX24603,000032C –19–01JUN03–6/7
NOTE: Take care that the shims do not get lost.
9. Repair bevel pinion drive shaft, see reference
“Repairing the Bevel Pinion Drive Shaft” in this Group.
–UN–20AUG02
8. Remove inner tapered roller bearing cup.
LX1030248
20
16
LX24603,000032C –19–01JUN03–7/7
CTM4820 (01JUL03)
20-16
Front-Wheel Drive Axles
082903
PN=126
Axle Housing and Differential
Repairing the Bevel Pinion Drive Shafts
NOTE: Remove bevel pinion drive shaft, see "Removing
the Bevel Pinion Drive Shaft" in this Group.
1. Pull the tapered roller bearing cone off the bevel pinion
drive shaft.
LX1018430
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
–UN–04FEB98
20
17
2. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,000032D –19–01JUL02–1/2
LX1018444
4. Install bevel pinion drive shaft, see "Installing the Bevel
Pinion Drive Shaft" in this Group.
–UN–04FEB98
3. Heat tapered roller bearing cone to 90-100°C
(195-215°F) and install it on the bevel pinion drive
shaft.
LX24603,000032D –19–01JUL02–2/2
CTM4820 (01JUL03)
20-17
Front-Wheel Drive Axles
082903
PN=127
Axle Housing and Differential
Install the Bevel Pinion Drive Shaft
–UN–04AUG03
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
Bevel pinion drive shaft - cone point adjustment
LX1033160
NOTE: Figure (a) is given either as an actual dimension
(e.g. 147.65) or as a tolerance (e.g. -0.35) in
relation to the nominal dimension.
1. Read figure (a), which is prefixed with a “Z”, at the
flange on the longer axle housing.
LX24603,000032E –19–01JUN03–1/15
LX1033161
–UN–04AUG03
2. Read dimension (b) on the bevel pinion drive shaft.
LX24603,000032E –19–01JUN03–2/15
–UN–09FEB95
3. Measure bearing width (c).
LX003237
20
18
Continued on next page
CTM4820 (01JUL03)
20-18
LX24603,000032E –19–01JUN03–3/15
Front-Wheel Drive Axles
082903
PN=128
Axle Housing and Differential
20
19
4. Calculate shim thickness (x).
Example I, if figure given is actual dimension:
Figure (a) read on the longer axle housing ....... 147.65 mm (5.813 in.)
Figure (b) read on the bevel pinion drive shaft . 117.10 mm (4.610 in.)
Measurement (c), bearing width ......................... 29.25 mm (1.152 in.)
–UN–22AUG02
Formula: x = a - b - c
x = 147.65 mm - 117.10 mm - 29.25 mm = 1.30 mm
LX1030250
(x = 5.813 in. - 4.610 in. - 1.152 in. = 0.051 in.)
In this example, total shim thickness required is 1.30
mm (0.051 in.).
Example II, if figure given is a tolerance:
Dimension (d) — nominal dimension of axle housing
730
733
138.5 mm
(5.453 in.)
740
144.5 mm
(5.689 in.)
745
750
148.0 mm
(5.827 in.)
Figure (a), tolerance read on the axle housing .... -0.35 mm (0.014 in.)
Figure (b) read on the bevel pinion drive shaft . 117.10 mm (4.610 in.)
Measurement (c), bearing width ......................... 29.25 mm (1.152 in.)
Dimension (d), nominal dimension taken from the table (e.g. for 750) ..
............................................................................... 148.0 mm (5.827 in.)
NOTE: If tolerance figure (a) has no sign in front of it or if
it is prefixed with a “+”, it should be added to
nominal dimension (d); if it is prefixed with a “-”, it
should be subtracted from the nominal dimension.
Formula: x = d ± a - b - c
x = 148.0 mm - 0.35 mm - 117.10 mm - 29.25 mm
x = 1.30 mm
(x = 5.827 in. - 0.014 in. - 4.610 in. - 1.152 in.)
(x = 0.051 in.)
In this example, total shim thickness required is 1.30
mm (0.051 in.).
Continued on next page
CTM4820 (01JUL03)
20-19
LX24603,000032E –19–01JUN03–4/15
Front-Wheel Drive Axles
082903
PN=129
Axle Housing and Differential
Installing the bevel pinion drive shaft
1. Install shims (A) of the calculated thickness.
LX1030251
–UN–20AUG02
2. Chill inner tapered roller bearing cup (B), and install.
LX24603,000032E –19–01JUN03–5/15
LX1030252
–UN–20AUG02
3. Chill outer tapered roller bearing cup (A), and install.
LX24603,000032E –19–01JUN03–6/15
LX1030253
–UN–20AUG02
4. Install bevel pinion drive shaft in axle housing.
LX24603,000032E –19–01JUN03–7/15
–UN–20AUG02
5. Heat tapered roller bearing cone to 90-100°C
(195-215°F), and install.
LX1030254
20
20
Continued on next page
CTM4820 (01JUL03)
20-20
LX24603,000032E –19–01JUN03–8/15
Front-Wheel Drive Axles
082903
PN=130
Axle Housing and Differential
20
21
NOTE: Do not install seal ring behind drive flange yet.
LX1030243
–UN–20AUG02
6. Install drive flange (B) and old shims (A).
LX24603,000032E –19–01JUN03–9/15
7. Install washer and, at this stage, the OLD self-locking
hex nut. While tightening the hex. nut turn the bevel
pinion drive shaft several times in both directions.
–UN–20AUG02
On front-wheel drive axles with TLS, use special tool
KJD10290 to tighten the hex. nut.
LX1030255
Specification
Hex. nut—Torque ......................................................................... 245 N•m
180 lb-ft
LX24603,000032E –19–01JUN03–10/15
Bevel pinion drive shaft - rolling drag torque check
and adjustment (without oil seal)
–UN–21AUG02
1. Check rolling drag torque of bevel pinion drive shaft.
LX1030256
Specification
Bevel pinion drive shaft—Rolling
drag torque ............................................................................. 2 to 2.5 N•m
1.47 to 1.84 lb-ft
2. If the specified rolling drag torque is not achieved by
using the old shims, correct rolling drag value by
installing appropriate new shims.
Continued on next page
CTM4820 (01JUL03)
20-21
LX24603,000032E –19–01JUN03–11/15
Front-Wheel Drive Axles
082903
PN=131
Axle Housing and Differential
Bevel pinion drive shaft — final assembly
–UN–20AUG02
1. Remove the drive flange of the bevel pinion drive shaft
again.
2. Apply a thin coat of oil to the outer circumference of
the seal ring.
LX1030257
3. Install seal ring using special tool KJD104191 (A) or
KJD102802.
4. After installation, cover the area between the lips of the
oil seal ring with grease.
1
On 730 and 733
2
On 740, 745 and 750
LX24603,000032E –19–01JUN03–12/15
5. Apply grease to O-ring (A) and install it in the drive
flange.
LX1030258
–UN–20AUG02
6. Coat meshing splines of drive flange and bevel pinion
drive shaft with special grease MOLYKOTE G
(L81050).
LX24603,000032E –19–01JUN03–13/15
–UN–20AUG02
7. Install drive flange (B) and shims (A) of calculated
thickness.
LX1030243
20
22
Continued on next page
CTM4820 (01JUL03)
20-22
LX24603,000032E –19–01JUN03–14/15
Front-Wheel Drive Axles
082903
PN=132
Axle Housing and Differential
20
23
8. Install washer.
Specification
Hex. nut—Torque ......................................................................... 245 N•m
180 lb-ft
10. Install differential, see reference “Install Differential”in
this Group.
LX1030255
On front-wheel drive axles with TLS, use special tool
KJD10290 to tighten the hex. nut.
–UN–20AUG02
9. Install NEW self-locking hex. nut.
LX24603,000032E –19–01JUN03–15/15
CTM4820 (01JUL03)
20-23
Front-Wheel Drive Axles
082903
PN=133
Axle Housing and Differential
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
LX1030259
NOTE: Remove axle housing, see "Removing the Axle
Housing" in this Group.
–UN–20AUG02
Removing the Differential
1. Remove differential (A).
LX24603,000032F –19–01JUL02–1/2
2. Remove bearing cups (A) and (B) of differential from
both axle housings.
3. Remove shims behind the bearing cups.
–UN–20AUG02
LX1030260
4. Repair differential, see “Repairing the Differential” in
this Group.
–UN–20AUG02
NOTE: Measure and note the thickness of the shims.
LX1030261
20
24
LX24603,000032F –19–01JUL02–2/2
CTM4820 (01JUL03)
20-24
Front-Wheel Drive Axles
082903
PN=134
Axle Housing and Differential
Recondition the Differential
20
25
–UN–20AUG02
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
LX1030262
NOTE: Remove differential, see reference “Removing the
Differential” in this Group.
Disassembling the differential (730, 733)
1. Remove tapered roller bearing cups from differential.
LX24603,0000330 –19–01JUN03–1/25
2. If not marked, mark housing (see arrows).
LX1033152
–UN–14JUL03
3. Remove fillister-head screws.
LX24603,0000330 –19–01JUN03–2/25
LX1033143
–UN–14JUL03
4. Remove ring gear.
Continued on next page
CTM4820 (01JUL03)
20-25
LX24603,0000330 –19–01JUN03–3/25
Front-Wheel Drive Axles
082903
PN=135
Axle Housing and Differential
LX1033144
–UN–14JUL03
5. Take off the top part of the housing together with the
disk pack and the drive bevel gear.
LX24603,0000330 –19–01JUN03–4/25
6. Drive the spring pin out of the shaft and housing.
7. Remove the various components from the two halves
of the housing.
LX1033145
–UN–14JUL03
8. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,0000330 –19–01JUN03–5/25
Assembling the differential (730, 733)
1. Pre-assemble the drive bevel gears:
–UN–04FEB98
a. Coat all the parts with oil.
NOTE: Lined side of thrust washer (B) must face disk
pack.
LX1018454
20
26
b. Install the thrust washer and splined disks on the
drive bevel gears.
A—Bevel gear
B—Thrust washer
C—Externally splined disk (4 used)
D—Internally splined disk (3 used)
Continued on next page
CTM4820 (01JUL03)
20-26
LX24603,0000330 –19–01JUN03–6/25
Front-Wheel Drive Axles
082903
PN=136
Axle Housing and Differential
20
27
LX1033146
–UN–14JUL03
2. Locate the pre-assembled drive bevel gears in the two
halves of the housing.
LX24603,0000330 –19–01JUN03–7/25
LX1033147
–UN–14JUL03
3. Apply oil to bevel pinions (A) and thrust washers (B),
and install them on the shaft.
LX24603,0000330 –19–01JUN03–8/25
LX1033148
–UN–14JUL03
4. Turn the pre-assembled shaft so that bore (A) is
aligned with bore (B), and install.
LX24603,0000330 –19–01JUN03–9/25
LX1033149
–UN–14JUL03
5. Install spring pin (A).
Continued on next page
CTM4820 (01JUL03)
20-27
LX24603,0000330 –19–01JUN03–10/25
Front-Wheel Drive Axles
082903
PN=137
Axle Housing and Differential
NOTE: Align the marks on the housing halves.
LX1033150
–UN–14JUL03
6. Bring the pre-assembled upper housing half down onto
the lower housing half.
LX24603,0000330 –19–01JUN03–11/25
LX1033143
–UN–14JUL03
7. Install the ring gear.
LX24603,0000330 –19–01JUN03–12/25
8. Coat the threads on the fillister-head screws with
L41475 LOCTITE 2431 thread lock.
–UN–14JUL03
9. Install fillister-head screws and evenly tighten them
cross-wise.
Specification
Fillister-head screws—Torque ........................................... 104 to 128 N•m
77 to 94 lb-ft
LX1033151
20
28
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
Continued on next page
CTM4820 (01JUL03)
20-28
LX24603,0000330 –19–01JUN03–13/25
Front-Wheel Drive Axles
082903
PN=138
Axle Housing and Differential
20
29
10. Install tapered roller bearing cones (A and B), one at
a time, on the differential housing.
LX1030479
–UN–21AUG02
11. Install differential, see reference “Install Differential” in
this Group.
LX24603,0000330 –19–01JUN03–14/25
Disassembling the differential (740, 745, 750)
LX1030262
–UN–20AUG02
1. Remove tapered roller bearing cups from differential.
LX24603,0000330 –19–01JUN03–15/25
2. If not marked, mark housing (see arrows).
LX1030263
–UN–20AUG02
3. Remove fillister-head screws.
LX24603,0000330 –19–01JUN03–16/25
LX1030264
–UN–20AUG02
4. Remove ring gear (A) housing (B).
Continued on next page
CTM4820 (01JUL03)
20-29
LX24603,0000330 –19–01JUN03–17/25
Front-Wheel Drive Axles
082903
PN=139
Axle Housing and Differential
LX1030266
–UN–21AUG02
5. Remove housing.
LX24603,0000330 –19–01JUN03–18/25
6. Remove all parts.
LX1030267
–UN–21AUG02
7. Clean the various parts, inspect them for wear or
damage and replace as necessary.
LX24603,0000330 –19–01JUN03–19/25
Assembling the differential (740, 745, 750)
1. Pre-assemble the bevel gears:
–UN–04FEB98
a. Coat all the components with oil.
NOTE: Lined side of thrust washer (B) must face disk
pack.
LX1018454
20
30
b. Install the thrust washer and splined disks on the
drive bevel gears.
A—Bevel gear
B—Thrust washer
C—Externally splined disk (4 used)
D—Internally splined disk (3 used)
Continued on next page
CTM4820 (01JUL03)
20-30
LX24603,0000330 –19–01JUN03–20/25
Front-Wheel Drive Axles
082903
PN=140
Axle Housing and Differential
20
31
LX1030268
–UN–21AUG02
2. Locate the pre-assembled drive bevel gears in the two
halves of the housing.
LX24603,0000330 –19–01JUN03–21/25
3. Apply oil to the bevel pinions, shafts and thrust
washers and install them.
LX1030476
–UN–21AUG02
A—Bevel pinion (4 used)
B—Shaft (2 used)
C—Thrust washer (4 used)
LX24603,0000330 –19–01JUN03–22/25
NOTE: Align the marks on the housing halves.
LX1033153
–UN–14JUL03
4. Bring the pre-assembled upper housing half down onto
the lower housing half.
Continued on next page
CTM4820 (01JUL03)
20-31
LX24603,0000330 –19–01JUN03–23/25
Front-Wheel Drive Axles
082903
PN=141
Axle Housing and Differential
5. Install the ring gear.
Specification
Fillister-head screws—Torque ........................................... 104 to 128 N•m
77 to 94 lb-ft
LX1030478
7. Install fillister-head screws and evenly tighten them
cross-wise.
–UN–21AUG02
6. Coat the threads on the fillister-head screws with
L41475 LOCTITE 2431 thread lock.
LOCTITE is a registered trademark of the Loctite Corporation
1
for North America: LOCTITE 242 (TY9370)
LX24603,0000330 –19–01JUN03–24/25
8. Install tapered roller bearing cones (A and B), one at a
time, on the differential housing.
–UN–21AUG02
9. Install differential, see reference “Install Differential” in
this Group.
LX1030479
20
32
LX24603,0000330 –19–01JUN03–25/25
CTM4820 (01JUL03)
20-32
Front-Wheel Drive Axles
082903
PN=142
Axle Housing and Differential
20
33
CTM4820 (01JUL03)
20-33
Front-Wheel Drive Axles
082903
PN=143
Axle Housing and Differential
Install Differential
–UN–06AUG03
CAUTION: Follow safety and repair instructions,
see reference “General Safety and Repair
Information” in Group 01.
Differential — bearing preload adjustment
LX1033162
NOTE: Figures (a) and (b) are given either as an actual
dimension (e.g. 188 or 8) or as a tolerance (e.g.
0.2) in relation to the nominal dimension.
1. Read figure (a), which is prefixed with a “W”, at the
flange on the longer axle housing.
–UN–06AUG03
2. Read figure (b), which is prefixed with a “W”, at the
shorter axle housing.
3. Place the tapered roller bearing cups onto the bearing
cones on the differential.
LX1033163
4. Place the differential with the bearing cup onto a
suitable device on a flat surface.
5. Turn differential and tapered roller bearing cup several
times in both directions.
–UN–21AUG02
IMPORTANT: Make sure that differential and bearing
cups are in the correct position as
otherwise the result of the
measurement will be incorrect.
NOTE: Measure at various points and determine the
average value.
LX1030482
20
34
6. Measure dimension (c).
7. Predefined dimension (d) of the bearing preload.
Specification
Tapered roller bearing—Preload ...................................... 0.05 to 0.10 mm
0.002 to 0.004 in.
Continued on next page
CTM4820 (01JUL03)
20-34
LX24603,0000331 –19–01JUN03–1/8
Front-Wheel Drive Axles
082903
PN=144
Axle Housing and Differential
20
35
8. Calculate total shim thickness (x = x1 + x2).
Example I, if figure given is actual dimension:
Figure (a) read on the longer axle housing ......... 188.0 mm (7.401 in.)
Figure (b) read on the shorter axle housing ............ 8.0 mm (0.315 in.)
Dimension (c) measured at differential ................ 194.0 mm (7.638 in.)
Dimension (d), prescribed bearing preload ........... 0.10 mm (0.004 in.)
–UN–22AUG02
Formula: x = (a + b) - c + d
x = (188 + 8) - 194 + 0.1 = 2.1 mm
LX1030495
(x = (7.401 + 0.315) - 7.638 + 0.004 = 0.082 in.)
In this example, total shim thickness required is 2.1
mm (0.082 in.).
Example II, if figure given is a tolerance:
Dimension (e) — nominal dimension of longer axle housing
730
733
740
745
750
187.8 mm (7.394 in.)
Dimension (f) — nominal dimension of shorter axle housing
730
733
8.0 mm (0.315 in.)
740
745
750
7.8 mm (0.307 in.)
Figure (a) read on the longer axle housing ............. 0.2 mm (0.008 in.)
Figure (b) read on the shorter axle housing ............ 0.2 mm (0.008 in.)
Dimension (c) measured at differential ................ 194.0 mm (7.638 in.)
Dimension (d), prescribed bearing preload ........... 0.10 mm (0.004 in.)
Dimension (e) taken from the table ..................... 187.8 mm (7.393 in.)
Dimension (f) taken from the table (e.g. for 750) .... 7.8 mm (0.307 in.)
NOTE: If tolerance figure (a or b) has no sign in front of it
or if it is prefixed with a “+”, it should be added to
nominal dimension (e or f); if it is prefixed with a
“-”, it should be subtracted from the nominal
dimension.
Formula: x = (e ± a) + (f ± b) - c + d
x = (187.8 + 0.2) + (7.8 + 0.2) - 194.0 + 0.1
x = 2.1 mm
(x = (7.393 + 0.008) + (0.307 + 0.008) - 7.638 + 0.004)
(x = 0.082 in.)
Continued on next page
CTM4820 (01JUL03)
20-35
LX24603,0000331 –19–01JUN03–2/8
Front-Wheel Drive Axles
082903
PN=145
Axle Housing and Differential
In this example, total shim thickness required is 2.1
mm (0.082 in.).
LX24603,0000331 –19–01JUN03–3/8
NOTE: Place shims of former thickness on the front side
of the ring gear (axle housing, upper picture).
–UN–21AUG02
9. Place shims (A) of calculated thickness on the right
and left half of the axle housing.
LX1030484
–UN–21AUG02
LX1030483
10. Install tapered roller bearing cups (B).
LX24603,0000331 –19–01JUN03–4/8
NOTE: For checking load pattern, coat several ring gear
teeth with marking blue.
–UN–20AUG02
11. Install differential (A).
LX1030259
20
36
Continued on next page
CTM4820 (01JUL03)
20-36
LX24603,0000331 –19–01JUN03–5/8
Front-Wheel Drive Axles
082903
PN=146
Axle Housing and Differential
20
37
LX1030155
–UN–20AUG02
12. Apply oil to O-ring (A) and install it.
LX24603,0000331 –19–01JUN03–6/8
13. Using the cap screws, join the halves of axle housing.
LX1030156
–UN–20AUG02
Specification
Cap screws—Torque .......................................................... 200 to 220N•m
148 to 162 lb-ft
Continued on next page
CTM4820 (01JUL03)
20-37
LX24603,0000331 –19–01JUN03–7/8
Front-Wheel Drive Axles
082903
PN=147
Axle Housing and Differential
Differential - check ring gear backlash and load
pattern
–UN–21AUG02
1. Turn the drive pinion several times in each direction.
2. Install a dial indicator and suitable device. Dimension
(a) 50 mm (1.968 in.).
LX1030485
3. Measure backlash.
Specification
730 and 733—Backlash ................................................... 0.27 to 0.35 mm
0.0106 to 0.0138 in.
740—Backlash.................................................................. 0.25 to 0.33 mm
0.0098 to 0.0130 in.
745 and 750—Backlash ................................................... 0.22 to 0.28 mm
0.0087 to 0.0110 in.
–UN–22AUG02
4. If necessary, correct backlash by moving an
appropriate shim. Do not add or remove shims. See
"Differential - bearing preload adjustment", steps 9 and
10.
LX1030486
• Not enough backlash: Move shim from the rear side
of the ring gear to the front side (toothed side).
• Too much backlash: Move shim from the front side
(toothed side) of the ring gear to the rear side.
5. Remove axle housing and differential again.
–UN–22AUG02
6. Compare ring gear load pattern on both sides of the
teeth with the illustration.
NOTE: If differences occur, recheck all adjustments
carried out so far on bevel pinion drive shaft and
on differential.
LX1030494
20
38
7. Install axle housing, see reference “Installing the Axle
Housing” in this Group.
A—Ideal load pattern
B—Teeth distance must be decreased
C—Teeth distance must be increased
D—Decrease distance (pattern B)
E—Increase distance (pattern C)
LX24603,0000331 –19–01JUN03–8/8
CTM4820 (01JUL03)
20-38
Front-Wheel Drive Axles
082903
PN=148
Axle Housing and Differential
Axle Housing - Fill with Oil
IMPORTANT: Exclusively use oil types specified in
the relevant tractor Technical Manual.
Refer to "Front Wheel Drive Axle Oil"
and "Capacities" in Technical Manual
"Repair", Section 10, Group 05.
LX1030487
CAUTION: Follow safety and repair instructions,
see "General Safety and Repair Information" in
Group 01.
–UN–21AUG02
20
39
1. Axle must be in horizontal position.
2. Install screw plug (B) with new O-ring.
Specification
Screw plug—Torque ....................................................................... 90 N•m
66 lb-ft
3. Remove screw plug (A) and fill in oil until it is level with
lower edge of plug bore.
4. Install screw plug (A) with new O-ring.
Specification
Screw plug—Torque ....................................................................... 90 N•m
66 lb-ft
LX24603,0000332 –19–01JUL02–1/1
CTM4820 (01JUL03)
20-39
Front-Wheel Drive Axles
082903
PN=149
Axle Housing and Differential
20
40
CTM4820 (01JUL03)
20-40
Front-Wheel Drive Axles
082903
PN=150
Group 200
Description and Theory of Operation
Front Wheel Drive Axles - Summary of
References
200
1
Operation of the front wheel drive axles is dealt with at the
following references:
• “Description of Front Wheel Drive”
• “Layout of Front Axle”
• “Operation of Differential”
• “Operation of Self-Locking Differential”
• “Operation of Planetary Drive”
• “Operation of Multi-Disk Brake”
• “Positive Front Wheel Lead Check”
LX24603,0000347 –19–01JUL02–1/1
CTM4820 (01JUL03)
200-1
Front-Wheel Drive Axles
082903
PN=151
Description and Theory of Operation
–UN–11DEC01
Description of Front Wheel Drive
LX1027668
200
2
A—Front-wheel drive clutch
B—U-jointed shaft
When front wheel drive is selected on tractors
equipped with front wheel drive, all four wheels are
driven simultaneously. This increases the tractor’s
pulling power and reduces wheel slip.
Power is transmitted from the transmission to the rear
wheels via the final drives. At the same time, power is
transmitted from the transmission via front wheel drive
clutch (A) to universal jointed shaft (B), which then
drives the front wheel drive axle (C) and thus provides
power directly to the front wheels.
Front wheel drive is engaged and disengaged by
means of a rocker switch. When front wheel drive is
engaged, a solenoid valve interrupts the flow of oil to
the front wheel drive clutch. Belleville springs
C—Front-wheel drive axle
compress the disk pack in the front wheel drive clutch
and form a connection between the transmission and
front wheel drive axle. When front wheel drive is
disengaged, oil flows from the solenoid valve to the
front wheel drive clutch. The Belleville springs are
compressed by the oil pressure and the disk pack is
released. There is no longer a connection between the
transmission and the front wheel drive axle. Front
wheel drive is always engaged when the engine is
shut off, as the transmission pump stops pumping oil.
Changing the gear pair or the tire combination enables
an overrun of between 1.5 and 4% to be obtained at
the front wheel drive axle. This means that the front
wheels turn slightly faster than the rear wheels. This
improves the tractor’s traction.
LX24603,0000294 –19–07NOV01–1/1
CTM4820 (01JUL03)
200-2
Front-Wheel Drive Axles
082903
PN=152
Description and Theory of Operation
Layout of Front Axle
LX003426
–UN–10FEB95
200
3
A—Axle housing
B—Differential
C—Knuckle housing
D—Wheel hub with planetary
drive
E—Drive shaft
F—Steering cylinder
Axle housing (A) consists of two or three parts which
are flanged together. The ends of the axle housing are
shaped like forks, to which the axle knuckle housings
(C) are attached.
Located inside the differential housing are the drive
bevel gears and bevel pinions, together with two disk
packs which permit self-locking. The differential is
designed to be self-locking. In most cases, this
prevents wheel spin when moving off and when the
machine is in motion (e.g. due to slippery conditions).
Knuckle housing
Drive shafts
Axle knuckle housings (C) provide the connection
between the axle housing and the wheel hubs (D). The
axle knuckle housings enable the axle to be steered.
Drive shafts (E) transmit power from the differential to
the wheel hubs. The universal joint on each drive shaft
compensates for the different locations of the
differential and wheel hubs.
Axle housing
Differential
Wheel hub with planetary drive
Differential (B) is located in the center of the front
wheel drive axle. The differential allows the two front
wheels to turn at different speeds, e.g. when cornering.
The differential consists of the differential housing, ring
gear and drive pinion. The drive pinion transmits power
from the universal jointed shaft to the differential.
The gears of the planetary drive (D) are driven by the
drive shaft. The planetary gears rotate around the
stationary hollow ring gear, taking the planetary carrier
and wheel hub with them. The planetary drive reduces
speed and increases torque.
Continued on next page
CTM4820 (01JUL03)
200-3
LX24603,0000348 –19–01JUL02–1/2
Front-Wheel Drive Axles
082903
PN=153
Description and Theory of Operation
200
4
Steering cylinder
The steering cylinder (F) is integrated into the axle
housing. It consists of a cylinder sleeve and a piston
with a piston rod at both ends. The piston area is the
same at either end and the steering system is
therefore fully balanced.
LX24603,0000348 –19–01JUL02–2/2
CTM4820 (01JUL03)
200-4
Front-Wheel Drive Axles
082903
PN=154
Description and Theory of Operation
Operation of Differential
LX003427
–UN–10FEB95
200
5
A—Drive shaft
B—Drive bevel gear
C—Disk pack
D—Ring gear
E—Bevel pinion
F—Drive pinion
Power flow when moving straight ahead
When the tractor is travelling straight ahead, the driven
ring gear (D), housing (G) with bevel pinions (E), drive
bevel gears (B) and drive shafts (A) all turn at the
same speed.
Bevel pinions (E) do not rotate around their own axes.
The two wheels are driven with equal power and at
equal speed.
Continued on next page
CTM4820 (01JUL03)
G—Housing
200-5
LX24603,0000296 –19–12NOV01–1/2
Front-Wheel Drive Axles
082903
PN=155
Description and Theory of Operation
LX003428
–UN–10FEB95
200
6
A—Drive shaft
B—Drive bevel gear
C—Disk pack
D—Ring gear
E—Bevel pinion
F—Drive pinion
Power flow when cornering
When the tractor is turning a corner, only the driven
ring gear and the housing with the bevel pinions rotate
at the same speed. As the right wheel - and thus the
right drive bevel gear - are stationary, the bevel
pinions must idle with the right drive bevel gear. As
they do so, they rotate around their own axes. The left
drive bevel gear meshes with the rotating bevel
pinions. This produces an additional drive for the left
drive bevel gear, which normally turns idly with the ring
gear when the tractor is moving straight ahead.
G—Housing
As a result, the left drive bevel gear and its associated
drive shaft turn twice for every one rotation of the ring
gear.
Thus, if the drive wheels have unequal resistance
applied to them, the wheel with the least resistance
turns faster. As one wheel turns faster, the other turns
slower by the same amount.
LX24603,0000296 –19–12NOV01–2/2
CTM4820 (01JUL03)
200-6
Front-Wheel Drive Axles
082903
PN=156
Description and Theory of Operation
Operation of Self-Locking Differential
LX003429
–UN–23FEB95
200
7
A—Drive bevel gear
B—Disk pack
The self-locking differential improves the driving
qualities of the machine when operating on rough and
slippery ground. The differential effect may be
eliminated completely or only partially. It prevents loss
in performance caused by slippage at the drive
wheels. Compared with a hand or pedal shift
differential, the self-locking differential has the benefit
that it limits the load on the wheel drive shafts. A
further advantage is that during actual operation, it
becomes effective immediately and automatically when
needed, without any assistance from the operator.
The locking effect is produced by two multiple disk
packs (B) positioned symmetrically in the differential
housing. Due to reaction forces generated during the
transfer of the drive torque, axial forces are produced
on the inclined surfaces of bevel pinions (C). These
C—Bevel pinion
axial forces, generated in the splines during torque
transfer, exert pressure on the disk packs via drive
bevel gears (A), which can move axially along the
drive shafts. Since the externally toothed disks engage
with the differential housing and the internally toothed
disks mesh with the drive bevel gears, relative
movement between the drive shafts and differential
housing is made more difficult.
The axial forces effect a load-dependent locking torque
in the disk packs which is always in direct proportion to
the input torque, i.e. the input torque remains
proportional to the output torque with a constant
locking effect. The locking effect therefore varies to
match the changes in engine torque and torque levels
in the various gears.
LX,FAXLE 003487 –19–01OCT92–1/1
CTM4820 (01JUL03)
200-7
Front-Wheel Drive Axles
082903
PN=157
Description and Theory of Operation
–UN–10FEB95
Operation of Planetary Drive
LX003430
200
8
A—Drive shaft
B—Planetary carrier
C—Planetary gear (3 used)
D—Hollow ring gear
E—Wheel hub
The planetary drive is driven by shaft (A). When the
drive shaft rotates, planetary gears (C) must turn idly
on the teeth of stationary hollow ring gear (D). At the
same time, planetary carrier (B) and wheel hub (E) are
F—Knuckle housing
forced to rotate in the same direction as the drive
shaft. In this way, the front wheels receive an input at
a lower speed but with increased torque.
LX24603,0000349 –19–01JUL02–1/1
CTM4820 (01JUL03)
200-8
Front-Wheel Drive Axles
082903
PN=158
Description and Theory of Operation
Operation of Multi-Disk Brake
LX1030496
–UN–24OCT02
200
9
A—Planetary carrier
B—Planetary gear (3 or 4
used)
C—Hollow ring gear
D—Disk pack
E—Brake piston
F—Oil from/to brake valve
G—Spring
H—Externally splined disk
Pressure oil (F) flows from brake valve behind front
axle brake piston (E) when brake pedals are
depressed. Oil pressure forces the brake piston
against disk pack (D) thus compressing it. A
connection is formed between the externally splined
disks (H) which are connected to the stationary hollow
ring gear (C) and the internally splined disks (I) which
are connected to the universal jointed shaft (J).
I—Internally splined disk
J—Drive shaft
and the universal jointed shaft is braked. The braking
effect is transmitted to the front wheels via planetary
gears (B) and planetary carrier (A).
When the brake pedals are released, oil pressure is
decreased and the springs (G) push the brake pistons
to their initial position.
With brake pressure increasing, the force exerted on
the disk pack by the brake piston increases as well
LX24603,000034A –19–01JUL02–1/1
CTM4820 (01JUL03)
200-9
Front-Wheel Drive Axles
082903
PN=159
Description and Theory of Operation
Positive Front Wheel Lead Check
NOTE: Observe correct positive front wheel lead.
Incorrect front wheel lead causes excessive wear
of tires and other components.
1. Check tire inflation pressures.
2. Mark drive flange of front wheel drive axle (A) and the
flange of universal jointed shaft (B) (see arrows).
–UN–08FEB95
Positive front wheel lead: 1.5 to 4%
LX003431
200
10
3. Secure universal jointed shaft with a rope as shown.
CAUTION: With tractor running, stay clear of
moving parts.
4. Switch on front wheel drive and drive the tractor slowly
forward in the lowest gear until the drive flange of the
front wheel drive axle has turned 25 times.
NOTE: When the drive flange has turned 25 times, the
universal jointed shaft should have turned 25.5 to
26 times, which represents a positive front wheel
lead between 2% and 4%. If positive front wheel
lead is not correct, check the tire combination
(see Operator’s Manual).
LX24603,0000295 –19–01JUL02–1/1
CTM4820 (01JUL03)
200-10
Front-Wheel Drive Axles
082903
PN=160
Index
Page
Page
A
D
Adjustments
Bevel pinion drive shaft, cone point
adjustment. . . . . . . . . . . . . . . . . . . . . . . . . 20-18
Bevel pinion drive shaft, rolling drag torque
adjustment. . . . . . . . . . . . . . . . . . . . . . . . . 20-18
Differential bearing preload . . . . . . . . . . . . . . 20-34
Preload adjustment at knuckle pin
bearings . . . . . . . . . . . . . . . . . . . . . . . . . . 15-20
Ring gear, backlash . . . . . . . . . . . . . . . . . . . 20-34
Ring gear, load pattern . . . . . . . . . . . . . . . . . 20-34
Steering angle. . . . . . . . . . . . . . . . . . . . . . . . 05-20
Toe-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-18
Tread, basic adjustment . . . . . . . . . . . . . . . . 05-16
AutoTrac, steering angle sensor, removing and
installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-22
Axle housing
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 20-10
Fill with oil. . . . . . . . . . . . . . . . . . . . . . . . . . . 20-39
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-14
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-12
Repairing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-13
Differential
Bearing preload adjustment . . . . . . . . . . . . . 20-34
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 20-8
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-34
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-5
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 20-25
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-24
Ring gear, adjusting backlash . . . . . . . . . . . . 20-34
Ring gear, check load pattern . . . . . . . . . . . . 20-34
Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 20-4
Drive shaft
Cross-section . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 15-8
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-27
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 15-24
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-23
B
Bevel pinion drive shaft
Cone point adjustment . . . . . . . . . . . . . . . . . 20-18
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-18
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-15
Repairing . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-17
Rolling drag torque adjustment . . . . . . . . . . . 20-18
Bolts and nuts, torques. . . . . . . . . . . . . . . . . . . . 01-2
F
Fill with oil
Axle housing . . . . . . . . . . . . . . . . . . . . . . . . . 20-39
Planetary drive . . . . . . . . . . . . . . . . . . . . . . . 10-29
Front wheel drive axle, layout . . . . . . . . . . . . . . 200-3
Front wheel drive, description. . . . . . . . . . . . . . 200-2
G
General Safety and Repair Information. . . . . . . . 01-1
K
C
Checks
Bevel pinion drive shaft, rolling drag
torque . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-18
Leaks, multi-disk brake . . . . . . . . . . . . . . . . . 10-28
Positive front wheel lead . . . . . . . . . . . . . . . 200-10
Ring gear, backlash . . . . . . . . . . . . . . . . . . . 20-34
Ring gear, load pattern . . . . . . . . . . . . . . . . . 20-34
Steering angle. . . . . . . . . . . . . . . . . . . . . . . . 05-20
Toe-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-18
Tread, basic adjustment . . . . . . . . . . . . . . . . 05-16
CTM4820 (01JUL03)
King pin, reconditioning . . . . . . . . . . . . . . . . . . 15-11
Knuckle housing
Cross-section . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 15-8
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-15
Preload adjustment at knuckle pin
bearings . . . . . . . . . . . . . . . . . . . . . . . . . . 15-20
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 15-11
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-9
Steering angle sensor, removing and
installing . . . . . . . . . . . . . . . . . . . . . . . . . . 15-22
Knuckle pin bearings
Preload adjustment . . . . . . . . . . . . . . . . . . . . 15-20
Index-1
Front-Wheel Drive Axles
082903
PN=1
Indx
1
Index
Page
Indx
2
Page
L
R
Lubricant
Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-11
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 00-12
Repair Information . . . . . . . . . . . . . . . . . . . . . . . 01-1
S
M
Mixing lubricants. . . . . . . . . . . . . . . . . . . . . . . . 00-11
Multi-disk brake
Cross-section . . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 10-16
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Leak check . . . . . . . . . . . . . . . . . . . . . . . . . . 10-28
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-9
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-17
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
Self-locking, operation . . . . . . . . . . . . . . . . . . . 200-7
Steering angle sensor, removing and
installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-22
Steering angle, checking and adjusting . . . . . . 05-20
Steering cylinder
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 05-4
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-12
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . . 05-7
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-6
Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 05-3
Storing lubricants . . . . . . . . . . . . . . . . . . . . . . . 00-12
T
O
Operation
Differential. . . . . . . . . . . . . . . . . . . . . . . . . . . 200-5
Multi-disk brake. . . . . . . . . . . . . . . . . . . . . . . 200-9
Planetary drive . . . . . . . . . . . . . . . . . . . . . . . 200-8
Self-locking differential . . . . . . . . . . . . . . . . . 200-7
P
Planetary drive (with multi-disk brake)
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 10-16
Fill with oil. . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-23
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-8
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-20
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-17
Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 10-6
Planetary drive (without multi-disk brake)
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Fill with oil. . . . . . . . . . . . . . . . . . . . . . . . . . . 10-29
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-14
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 200-8
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-10
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-9
Sectional view. . . . . . . . . . . . . . . . . . . . . . . . . 10-4
Positive front wheel lead check . . . . . . . . . . . 200-10
Preload adjustment at knuckle pin bearings . . . 15-20
CTM4820 (01JUL03)
Theory of operation
Front wheel drive . . . . . . . . . . . . . . . . . . . . . 200-2
Front-wheel drive axle. . . . . . . . . . . . . . . . . . 200-3
Tie rods
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-5
Tie-rods
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 05-13
Toe-in, checking and adjusting . . . . . . . . . . . . . 05-18
Torques for bolts and nuts . . . . . . . . . . . . . . . . . 01-2
Tread
Basic adjustment check . . . . . . . . . . . . . . . . 05-16
Toe-in, checking and adjusting . . . . . . . . . . . 05-18
W
Wheel hub
Cross-section (with multi-disk brake). . . . . . . . 10-6
Cross-section (without multi-disk brake) . . . . . 10-4
Exploded view. . . . . . . . . . . . . . . . . . . . . . . . 10-30
Installing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-34
Reconditioning . . . . . . . . . . . . . . . . . . . . . . . 10-32
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-31
Index-2
Front-Wheel Drive Axles
082903
PN=2