31251
Air Operated Pump
Pump Ratio: 220:1
Rated GPM Flow: 0.4*
Rated PSI: 22,000*
*Values are based on 100 PSI air supply pressure.
p
Installation, Care and Operation
Manual
Foreword…
This manual is published as a guide for the normal operations of your NATIONAL OILW ELL VARCO equipment.
Because of the many factors which contribute to the proper function or malfunction of this machinery, and not having
complete knowledge of each factor or combination of factors, we cannot detail all facets of this subject. We must,
therefore, confine the scope of this presentation, and when situations encountered are not fully encompassed by
complete, understandable instructions, these situations must be referred to the manufacturer.
When other than routine servicing is necessary, it can be most efficiently performed if the unit is removed to an area of
adequate space where impact tools are accessible.
Improvements in design, engineering, materials, production methods, etc., may necessitate changes in these products
and result in inconsistencies between the contents of this publication and the physical equipment. W e reserve the right
to make these changes without incurring any liability or obligation beyond that stipulated in the purchase contract.
The pictures, photographs, charts, diagrams, drawings, verbal contents, and specifications contained herein are not to
be construed as giving rise to any warranty on the part of NATIONAL OILWELL VARCO. NATIONAL OILWELL VARCO
makes no warranty, either expressed or implied beyond that stipulated in the purchase contract.
TM
BEAR pumps are manufactured by National Oilwell Varco in Tulsa, Oklahoma. A serial number is stamped on
each pump, fluid end and power end. Please refer to this serial number when ordering parts.
! CAUTION ! CAUTION ! CAUTION !
EXERCISE SAFETY IN ALL PERFORMANCES. DO NOT IGNORE ANY W ARNINGS OR CAUTIONS. USE ONLY
APPROVED METHODS, MATERIALS, AND TOOLS. DO NOT PERMIT ANY FUNCTION OF QUESTIONALBLE
SAFETY BECAUSE ACCIDENTS ARE CAUSED BY UNSAFE ACTS AND UNSAFE CONDITIONS.
SAFETY IS YOUR BUSINESS AND YOU ARE INVOLVED.
! WARNING ! WARNING ! WARNING !
BEFORE PERFORMING ANY SERVICE FUNCTION, BE CERTAIN THAT ALL OF THE UNIT IS SEPARATED FROM
ITS POWER SOURCE OR THAT THE POWER SOURCE IS LOCKED-OUT TO PREVENT ANY FORM OF ENERGY
FROM ENTERING THE EQUIPMENT – THIS WOULD INCLUDE ELECTRICAL PNEUMATIC ENERGY FROM THE
COMPRESSOR/AIR SYSTEM AND THE STORED HYDRAULIC ENERY OF THE SYSTEM.
! WARNING ! WARNING ! WARNING !
FAILURE TO OBSERVE THE WARNINGS AND NOTES OF CAUTION IN THIS PUBLICATION CAN
RESULT IN PROPERTY DAMAGE, SERIOUS BODILY INJURY OR DEATH.
! WARNING ! WARNING ! WARNING !
BEFORE SERVICING PUMPS:
1. SHUT DOWN OR DISENGAGE THE PUMP POWER SOURCE.
2. SHUT DOWN ALL PUMP ACCESSORY EQUIPMENT.
3. RELIEVE OR “BLEED OFF" ALL PRESSURE FROM THE PUMP FLUID END(S) AND AIR END(S).
FAILURE TO SHUT DOWN POWER AND RELIEVE PRESSURE FROM THE PUMP BEFORE SERVICING CAN
RESULT IN SERIOUS PERSONAL INJURY AND PROPERTY DAMAGE.
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Table of Contents
1.0
SYSTEM DESIGN CONSIDERATIONS ............................................................................................... 3
1.1
GENERAL ........................................................................................................................................ 3
1.2
LIFTING............................................................................................................................................ 3
1.3
PUMP MOUNTING ........................................................................................................................... 3
1.4
SUCTION LINE................................................................................................................................. 3
1.5
DISCHARGE LINE ........................................................................................................................... 4
1.6
AIR INLET LINE................................................................................................................................ 4
2.0
INSTALLATION, OPERATION & MAINTENANCE ............................................................................. 5
2.1
INSTALLATION AND START UP ..................................................................................................... 5
2.2
GENERAL MAINTENANCE .............................................................................................................. 5
2.3
AIR MOTOR MAINTENANCE........................................................................................................... 5
2.4
FLUID END MAINTENANCE ............................................................................................................ 6
2.5
TROUBLE SHOOTING GUIDE......................................................................................................... 6
3.0
PARTS LIST ........................................................................................................................................ 7
3.1
AIR MOTOR EXPLODED VIEW & BOM (32200).............................................................................. 7
3.2
FLUID END EXPLODED VIEW AND BOM (35100) .......................................................................... 8
4.0
DISASSEMBLY AND REASSEMBLY ................................................................................................. 9
4.1
DISASSEMBLY ............................................................................................................................... 9
4.1.1
SEPARATION OF AIR MOTOR & FLUID END.......................................................................... 9
4.1.2
AIR MOTOR DISASSEMBLY .................................................................................................... 9
4.1.3
FLUID END.............................................................................................................................. 10
4.2
REASSEMBLY ............................................................................................................................... 10
4.2.1
AIR MOTOR: PISTON AND TRIP ROD ................................................................................... 10
4.2.2
AIR MOTOR: CYLINDER HEAD AND AIR VALVE .................................................................. 11
4.2.3
AIR MOTOR: FINAL ................................................................................................................ 11
4.2.4
FLUID END.............................................................................................................................. 12
4.2.5
REATTACHMENT OF AIR MOTOR & FLUID END ................................................................. 12
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1.0 SYSTEM DESIGN CONSIDERATIONS
1.1
GENERAL
Careful planning of the unit layout will save considerable time and expense, both initially when the installation is
made and later during the operation. In selecting the location for the pump, consideration should be given to the fact that
a positive suction head at the pump inlet contributes to pump efficiency. However, the layouts of the piping, the
arrangements of the fittings and restrictions in the suction and discharge lines have even more effect. For this reason, all
fittings and valves should be full opening. The following points outline other basic requirements for an installation that
will contribute greatly toward good pump operation and ease of maintenance.
1.2
LIFTING
! WARNING ! WARNING ! WARNING !
ALTHOUGH THE PUMPS DESCRIBED CAN BE SAFELY LIFTED MANUALLY, CARE SHOULD BE EXERCISED TO
AVOID BODILY INJURY AND DAMAGE TO EQUIPMENT. DO NOT LIFT OR SUPPORT PUMPS BY THE AIR
LINE(S).
1.3
PUMP MOUNTING
1. Consideration should be given to the location of the equipment with its proximity to the associated equipment,
fluid supply, environmental contamination, ease of maintenance, etc.
2. The pump should be supported under the Cylinder Base and secured by way of the Stanchion Rods. National
Oilwell Varco recommends the use of the Mounting Bracket Assembly (Part No. 32260).
3. The method of mounting must be of sufficient strength to prevent flexing of the equipment.
4. The equipment must be adequately secured to the foundation. High strength bolts or cap screws with locking
devices are generally employed.
1.4
SUCTION LINE
1. The suction line must not be smaller than the suction intake of the fluid cylinder but may be larger. The length of
the suction line should be held to a minimum and should run straight from the supply tanks to the pump.
2. Provide a full opening gate valve in the suction line adjacent to the supply tank to permit the line to be drained
when necessary. Do not use any type of restricting valve.
3. Do not use meters or other restrictions in the suction line. Eliminate any rise or summit in the suction line where
air or vapor can collect.
4. When necessary to manifold a number of pumps to a common suction, the diameter of the manifold and suction
pipe leading from the supply tank must be such that it has a cross sectional area equal to or greater than the
area of any combined individual suction pipes.
5. When a charging or booster pump is used in the suction line it must have a capacity equal to twice that of the
pump output. This is necessary to provide a charging pump with an output great enough to meet the peak
volume requirements of the pump during the suction stroke and not act as a restriction in the line.
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6. All piping, both suction and discharge, must be solidly and independently supported. The first support must be
as close to the pump as practical. This is necessary to prevent placing the pump in a strain and to keep any
vibration in the system from acting directly on the pump.
1.5
DISCHARGE LINE
1. Do not reduce the size of the discharge line below that of the pump outlet.
2. Any bend in the discharge line should be made with long radius 45°ells. Do not use a bend directly adjacent to
the fluid cylinder. Avoid using any 90° bends, if a t all possible.
3. A pressure relief valve or safety head should be installed in the discharge line. The relief valve set pressure or
rupture disc burst pressure should be no greater than 25% above the maximum rated pressure for the pump
size being used.
4. All piping, both suction and discharge, must be solidly and independently supported. The first support must be
as close to the pump as practical. This is necessary to prevent placing the pump in a strain and to keep any
vibration in the system from acting directly on the pump.
1.6
AIR INLET LINE
1. A properly sized air filter must be installed in the air supply to prevent water and contaminants from entering the
Air Motor.
2. A properly sized air regulator must be installed in the air supply line, preferably after the filter, and set to no
more than 150 pisg (10.3 bar).
! WARNING ! WARNING ! WARNING !
SUPPLY AIR PRESSURES IN EXCESS OF THE STATED MAXIMUMS CAN RESULT IN PROPERTY DAMAGE,
SERIOUS BODILY INJURY OR DEATH.
3. A properly sized lubricator must be installed in the air supply line after all regulators and filters. Proper
lubrication is detailed further in section 3.0 of this manual.
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2.0 INSTALLATION, OPERATION & MAINTENANCE
2.1
INSTALLATION AND START UP
This assembly is a booster pump and requires the use of a low pressure feed pump, such as BEAR™ part number
31232. Also, properly sized check valves are will need to be purchased separately and installed into the suction and
discharge ports. Either port my become the suction or discharge and is dictated by the orientation of the installed check
valves.
1. Inspect the unit for any damage that may have occurred during shipment. If no damage or defect is apparent,
proceed to place the unit in service. The following is a guide for initial startup.
2. Open valve at pump suction.
3. Open the bypass valve between pump discharge and unit.
4. Start feed pump to prime the pump fluid chamber.
5. Open valve at air inlet slowly and run the pump at low speed until fluid end is completely primed.
6. Close Bypass and open the valve at air inlet completely and observe the following:
Check for fluid leaks at fluid cylinder and connections.
Check for fluid leaks at packing. Note: New packing may require a short "set" period. Run pump to full
pressure. Close valve at air inlet and let pump sit idle for five minutes. As packing wears it is necessary to
adjust the packing nut.
It is recommended to repeat this procedure any time the pump has not been operated for an extended
amount of time and after any maintenance.
2.2
GENERAL MAINTENANCE
The BEAR™ Air Operated Pump Line should be supplied with moisture free air. In order to accomplish this, use of a
BEAR™ Air Filter/Moisture Separator (Part No. 27240) is strongly recommended. This is important to avoid icing,
especially when operating in very cold and/or humid conditions coupled with high cycle rates and high operating
pressures. Optimum lubrication will be obtained by installing a BEAR™ Air Lubricator (Part No. 27440) and daily
maintaining adequate levels of BearCare Lubricant (Part No. 27010) in the lubricator. The following points are intended
as a guide to be used in setting up a Maintenance Program. Good preventive maintenance will pay big dividends in the
form of reliable service with a minimum of trouble.
2.3
AIR MOTOR MAINTENANCE
A normal maintenance and service inspection of your BEAR™ 32200 Air Motor is required at 1500 hours of service in
non-circulating applications and at 800 hours of service in circulating applications. Recommended service at this interval
requires installation of the Seal Kit (Part No. 32297). It is highly recommended that (1) one Major Repair Kit (Part No.
32299) or Minor Repair Kit (Part No. 32298) be kept on hand at all times for regular maintenance and emergency
repairs. (Both the Major & Minor Repair Kits include the Seal Kit.)
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2.4
FLUID END MAINTENANCE
Normal maintenance of the BEAR™ 35100 Pump Fluid End varies depending on the type of fluid pumped and the
pressures involved. A service inspection should occur every time the pump is operated. If there is excessive leakage
from the Packing Set (9), bleed off all pressure and adjust the Packing Gland Nut (5). If after adjustment the Fluid End
continues to leak, it is time to change the packing and possibly the Pump Rod (1). After 900 hours of Operation, proper
maintenance requires installation of the Repair Kit (Part No. 35199). It is highly recommended that at one Repair Kit
and at least a couple Packing Sets (9) be kept on hand at all times for regular maintenance and emergency repairs.
2.5
TROUBLE SHOOTING GUIDE
Problem
Cause
Correction
Air Motor stalls Piston Rod is loose where it connects to
at the top or the fluid end plunger rod.
bottom
of
stroke—no
air Trip Springs or Trip Rod Valve Spring is
blows
from broken.
exhaust ports.
Air Motor is frozen due to icing or lack of
lubrication.
Tighten connections.
Inspect and replace as needed.
Install air filter/moisture separator.
Check
lubricator and fill with BearCareTM Lubricant.
Muffler has become fouled or clogged with Replace muffler and check air supply line.
contaminants.
Inspect the air filter and lubricator.
Air
Motor See CAUSES above.
See CORRECTIONS above.
stalls—air blows
from
exhaust Air Valve is in the dead stall position.
Remove one of the Trip Spring Retainers, Trip
ports.
Spring, and Ball. Carefully push the Air Valve
up or down.
Lubricate the Air Valve and
reassemble.
O-Rings are worn, cut, or otherwise Install Seal Kit for the respective Air Motor. If
dust, dirt, or other contaminants are found in the
damaged.
air motor, check the air supply system.
Pump does not Feed pump is not working properly
Repair or replace
deliver fluid .
Check valves are not installed properly
Check flow direction markings on check valves
and suction/discharge line placement.
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3.0 PARTS LIST
3.1
AIR MOTOR EXPLODED VIEW & BOM (32200)
3
1
2
4
9
10
5
7
11
6
8
12
13
14
15
16
17
18
19
20
22
14
21
23
24
25
26
24
28
27
30
29
32
31
34
33
Item Part No.
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
AP32201
AP32225
AP32219
AP32235
AP32216
AP32220
90115
AP32217
AP32231
AP32218
AP32204
AP32211
AP32202
90133
AP32214
AP32215
AP32203
95128
AP32223
AP32205
AP32224
90011
AP32226
AP32206
AP32207
AP32210
AP32209
AP32208
AP32227
90440
90216
AP32213
AP32212
AP32228
AP32230
36
AP32297
37
AP32298
38
AP32299
Cylinder Head, 7-3/8"
Bolt
Trip Spring Retainer Nut
Muffler
Valve Ball
Trip Spring
O-Ring
Trip Spring Retainer
Plug, ¾” NPT
Trip Spring Retainer Bolt
Adapter
Air Line Assembly
Valve Sleeve
Valve Sleeve O-Ring
Stop Nut
Upper Valve Keeper
Air valve
Air Valve O-Ring
Lower Valve Keeper
Bushing
Retainer Ring
Trip Rod O-Ring
Trip Rod Assembly
Cylinder Gasket
Piston Nut
Cylinder
Piston
Piston Nut Washer
Valve Trip Collar
Piston O-Ring
O-Ring
Piston Rod
Nut
Cylinder Base, 7-3/8"
Plug, ¼” NPT
Seal Kit, Includes Items:
(5,6,7,14,15,18,22,24,30 & 31)
Minor Repair Kit, Includes Items:
(36,13,16,17,19,21,23 & 29)
Major Repair Kit, Includes Items:
(37 & 26)
11
Air Inlet:
Max. Air Supply:
Dimensions:
Weight:
1/2" FNPT
125 PSI
18-1/4"H x 12-1/4"W x 8-5/8"D
29 lbs
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Qty.
1
6
2
2
2
2
2
2
2
2
2
1
1
5
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
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3.2
FLUID END EXPLODED VIEW AND BOM (35100)
Item Part No.
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
Pump Rod
Stanchion Washer
Stanchion Rod
Coupling Nut
Packing Gland Nut
Pump Body
Stanchion Nut
Spacer
Packing Set
Sleeve
O-Ring
Plug
Repair Kit, Includes Items:
(1,5,8,9,10 & 11)
AP35101
AP33201
AP33202
AP33220
AP35102
AP35106
AP33205
AP35103
AP35140
AP35105
91216
AP35107
AP35199
Inlet/Outlet:
Max. Pressure:
Dimensions:
Weight:
Qty.
9/16" HP Autoclave
40,000 PSI
5" x 9" x 13"
(Less Stanchions)
35 lbs (with Stanchions)
33 lbs (without Stanchions)
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4.0 DISASSEMBLY AND REASSEMBLY
4.1
DISASSEMBLY
This section contains numerous references to parts and procedures for the servicing of the pump. A component’s
description is capitalized and followed by a number within a set of parenthesis. This number refers to a specific part
identified in 3.1 or 3.2 of this manual.
When disconnecting the air operated pump, relieve all pressure from the pump before removing the discharge line and
suction line assemblies. Using the air inlet valve; stop the air motor with the Piston Rod (32) at or near the bottom of the
stroke. Disconnect the air pressure supply line from the Cylinder Head (1).
! WARNING ! WARNING ! WARNING !
FAILURE TO RELIEVE ALL HYDRAULIC PRESSURE FROM THE AIR OPERATED PUMP W HEN DISCONNECTING
THE FLUID END CAN RESULT IN PROPERTY DAMAGE, SERIOUS BODILY INJURY OR DEATH.
4.1.1
SEPARATION OF AIR MOTOR & FLUID END
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.2 of this manual
1. Unthread Coupling Nut (4) from Piston Rod (32 of 3.1).
2. Remove Nuts (7) and Washers (2) from Stanchion Rods (2).
3. Slide the fluid end assembly off of the Stanchion Rods (3) and recover the remaining two Washers (2).
4.1.2
AIR MOTOR DISASSEMBLY
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.1 of this manual
1. Remove the Mufflers (4). This is not necessary but it will make further disassembly easier.
2. Remove both Nuts (3) and Bolts (10) from the Cylinder Head (1). Remove the Trip Spring Retainers (8) and re
cover the Trip Springs (6) and Valve Balls (5).
3. Remove the Air Line Assembly (12) by unthreading the nuts from the Adapters (11). Using a back-up wrench,
remove the Nuts (33) and Bolts (2) that fasten the air motor assembly together.
4. Remove the Cylinder Base (34). If replacing the O-ring (31), remove and discard it at this time.
5. Remove the Cylinder (26) from the Cylinder Head (1). Do not damage the sealing surfaces of the Cylinder (1).
Discard both Cylinder Gaskets (24).
6. Place the Cylinder Head (1) upside-down on a table. Raise the Piston (27) above the Cylinder Head (1) and
remove the Retaining Ring (21).
7. Remove the Air Valve by pulling the Piston Rod (32) up and away from the Cylinder Head (1). Remove the Valve
Sleeve (13) by inserting the head of a Bolt (2) or by using 90° retaining ring pliers and insert ing the points into the
holes in the Valve Sleeve (13). Take care to avoid doing damage to bore of the Cylinder Head (1) or the inside
of the sleeve. After removal, remove the O-Rings (14) from the Air Valve Sleeve (13).
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8. Remove the Stop Nut (15) and the Upper Valve Keeper (16) from the Trip Rod Assembly (23). If necessary,
use the wrench flat on the Trip Rod to use for holding the Trip Rod, but do not damage the sealing area on the
Trip Rod Assembly (23).
9. Remove the Air Valve (17), Lower Valve Keeper (19) and Bushing (20). Remove and, if necessary, discard the
O-Rings (17,18,22) from the Air Valve (17) and Bushing (20).
10. Secure Piston (27) and remove Piston Nut (25) and Piston Nut Washer (28).
11. Remove the Trip Rod Assembly (23) and Trip Collar (29) from Piston Rod (32).
12. Remove O-Ring (30) from Piston (27). If replacing either the Piston (27) or Piston Rod (32), disassemble these
at this time.
4.1.3
FLUID END
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.2 of this manual
1. Holding the Pump Body (6) in a vise, unthread the Packing Gland Nut (5) and remove the Pump Rod (1) with
the Coupling Nut (4).
2. Remove the Bottom Plug (12) and discard the O-Ring (11).
3. Remove the Rod Sleeve (10), Packing Set (9) and Spacer (8). Discard the Packing Set (9).
4. Examine the condition of the Pump Rod (1). If there are signs of longitudinal scoring lines, discard and replace.
4.2
REASSEMBLY
Clean all replaceable parts with an appropriate environmentally safe cleaning solution. Care should be exercised when
installing all o-rings. Make sure o-rings are adequately lubricated and carefully assembled to avoid cutting and insure
proper seating and sealing. Inspect all parts for abnormal wear or damage and replace as necessary.
4.2.1
AIR MOTOR: PISTON AND TRIP ROD
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.1 of this manual
The urethane O-rings (18) of the Air Valve (17) are sensitive to certain greases. Lubricate the parts and o-rings of the air
motor assembly with a silicone based non-water soluble lubricant. If conducting routine servicing, use genuine Bear
replacement parts from Seal Kit 32297. If this is a major overhaul, select either Minor Repair Kit 32298 or Major Repair
Kit 32299.
1.
If they have been separated, apply a thread locking compound to the threads of the Piston Rod (32). Install the
Piston Rod into the Piston (27) and tighten to 40 ft-lb's. Allow thread locking compound to dry completely before
installation.
2. Install new O-Rings (30,31) in Cylinder Base (34) and Piston (27).
3. Install new O-Rings (14,22) on the Bushing (20).
4. Install new O-Rings (18) on the Air Valve (17).
5. Install Bushing (20) with new O-Rings (14) and (22) onto the Trip Rod Assembly (23).
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6. Install the Lower Valve Keeper (19) onto the Trip Rod Assembly (23) and seat at the shoulder. Be sure the
Lower Valve Keeper (19) fits over the shaft and seats properly.
7. Place the Air Valve (17) over the Trip Rod Assembly (23) and seat on the Lower Valve Keeper (19). Thread the
Upper Valve Keeper (16) onto the Trip Rod Assembly (23) until finger tight, then back-off 1/4 turn. Thread Stop
Nut (15) up to the Upper Valve Keeper (16) and lock together. Use a back-up wrench to make sure the Upper
Valve Keeper (16) does not change position.
8.
4.2.2
Insert the Valve Trip Collar (29) into the Piston Rod (23). Replace the Piston Nut W asher (28), followed by the
Trip Rod Assembly (23). Apply a thread locking compound to the threads of the Piston Nut (25) and torque to
roughly 20 ft-lbs.
AIR MOTOR: CYLINDER HEAD AND AIR VALVE
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.1 of this manual
1. Install new O-Rings (14) on the Valve Sleeve (13), if it has been removed, and lubricate inside and outside.
2. Slide Valve Sleeve (13) into the lubricated bore of Cylinder Head (1). Align the large diameter holes with the
openings for the Trip Spring Retainers (8) in the Cylinder Head (1). Note: Use one Trip Spring Retainer (8) to
hold the Valve Sleeve (13) in place while completing assembly.
3.
Insert the Air Valve with attached components into the Valve Sleeve (13). Insert the Bushing (20) into the
Cylinder Head far enough to clear the retainer ring grooves. Align one of the detent areas (upper or lower) of
the Air Valve (17) with the trip spring retainer bores of the Cylinder Head. Install Retainer Ring (21).
4. Install the Trip Spring Retainer (8) that you are not using to align the Valve Sleeve (13) with new O-Ring (7), Trip
Spring (6), and Valve Ball (5) into the Cylinder Head (1) and secure with Bolt (10) and Nut (3). Torque Nuts (3)
to no more than 15 ft-lbs.
5.
4.2.3
Remove the first Trip Spring Retainer (8) used to align and retain Valve Sleeve (13). Repeat the process
described in the step above to install the second Trip Spring Retainer (8).
AIR MOTOR: FINAL
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.1 of this manual
1. Install the Cylinder Gasket (24) in both The Cylinder Head (1) and Cylinder Base (34).
2. Lubricate the inside bore of the Cylinder (26) and slip over the Piston assembly. Seat Cylinder (26) fully in the
Cylinder Head (1).
3. Carefully insert the Piston Rod (32) into the bore in the center of the Cylinder Base (34). Make sure the Cylinder
is evenly seated to both the Cylinder Head and Cylinder Base. Fasten the Cylinder Head to the Cylinder Base
using the long Bolts (2) and the corresponding Nuts (33). Evenly torque the Nuts (33) by alternating sides to
evenly compress the Gaskets and avoid misalignment. Final torque should be 30 ft-lbs.
4. Replace Air Line Assembly (12) and tighten compression nuts onto Adapters (11).
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4.2.4
FLUID END
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.2 of this manual
Clean all parts not to be replaced with an appropriate environmentally safe cleaning solution. Lubricate the parts to be
reinstalled with a non-water soluble lubricant. The Fluid End Repair Kit (Part No.: 35199) contains all of the parts
necessary for most rebuilds. Note: Care should be exercised when installing all O-Rings and Packing Rings. Make sure
these items are not damaged and that they are seated properly. The application of a non-water soluble lubricant is
highly recommended to avoid damage of all o-rings, packing, and threaded parts.
1. Place the O-Ring (11) into the O-Ring groove of the bottom Plug (12). Lubricate the O-Ring (11) and the
threads of the Plug (12).
2. Insert the Spacer (8) into the Pump Body (6).
3. Install a new Packing Set (9) into the Pump Body (6). When assembly is complete the peak of the v-packing
should point upward toward the air motor, “٨”. Do not damage packing rings.
4. Insert the Rod Sleeve (10) aligning the holes in the end with the port holes in the Pump Body (6) with a small
screw driver. Thread the bottom Plug (12) into the Pump Body (6). Torque to 60 to 80 ft-lbs. Note: Make sure
the O-Ring (11) seats properly and that the head of the Plug (12) is butted up flush to the bottom of the Pump
Body (6).
5. Lubricate the threads of the Packing Gland Nut (5) and thread into the top of the Pump Body (6) until finger tight.
6. Lubricate the Pump Rod (1) with non-water soluble grease. Insert the Pump Rod (1) through the Coupling Nut
(4) and carefully insert the Pump Rod (1) into the top of the Pump Body (6).
4.2.5
REATTACHMENT OF AIR MOTOR & FLUID END
Unless noted, the numbers in parenthesis in this section refer to the exploded view in Section 3.2 of this manual
1.
Place one Stanchion Washer (2) onto each Stanchion (3) and slide the Pump Fluid End Assembly onto the
Stanchions (3). Place one Stanchion Washer (2) on each Stanchion on the underside of the Pump Body (6) and
torque with the Stanchion Nuts (7) 50 to 70 ft-lbs.
2. Reattach the Coupling Nut (4) onto the Piston Rod (32 of 3.1)
3. Follow the instructions provided in section 2.1 for reinstallation.
12
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Installation, Operation, and
Maintenance Manual
BEAR PRODUCT LINE - PFT PRODUCTS
http://www.nov.com/bearpumps
6750 S 57th W Ave, Tulsa, OK 74131
Phone: 918-447-4600
13
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Fax: 918-447-4707