T
ECHNICAL INFORMATION
Models No.
6936FD
Description
Cordless Impact Driver
PRODUCT
P1/8
L
CONCEPT AND MAIN APPLICATIONS
Model 6936FD has been developed as an 18V version tool of the
current 14.4V Model 6935FD.
Uses 18V cluster type batteries as power source, and features the following
same benefits as Model 6935FD.
With built-in LED job light
Hammer case of new design without screw hole protrusions
for increased maneuverability
Phosphorescent (glow-in-the-dark) bumper
Max. fastening torque: 140 N.m
W
This new product will be available in the following variations.
Battery
Model No.
type
quantity Charger
6936FDWAE
1822 (2.0Ah/ Ni-Cd)
6936FDWDE*
1834 (2.6Ah/ Ni-MH)
6936FDWFE
1835 (3.0Ah/ Ni-MH)
6936FDZ
No
2
H
Plastic
carrying case
DC1804
Yes
No
No
Dimensions: mm ( " )
Length ( L )
163 (6-3/8)
Width ( W )
94 (3-11/16)
Height ( H )
243 (9-9/16)
*Offered as Model 6936FD to USA, Canada, Mexico, and Panama
Specification
Voltage: V
Battery
Capacity: Ah
Cell
Max output: W
18
2.0/ 2.6/ 3.0
Ni-Cd/ Ni-MH
250
Driving shank
6.35mm (1/4") Hex
M4 - M8 (5/32 - 5/16")
M5 - M14 (3/16 - 9/16")
Machine screw
Capacities
Standard bolt
High tensile bolt
Coarse thread screw
Impacts per min.: min.-1=bpm
No load speed: min.-1=rpm
M5 - M12 (3/16 - 15/32")
22 - 125mm (7/8 - 4-7/8")
0 - 3,200
0 - 2,600
Max. fastening torque: N.m (kgf.cm/in.lbs)
Electric brake
Variable speed (electric)
Reversing switch
Net weight*: kg (lbs)
140 (1,430/ 1,240)
Yes
Yes
Yes
1.9 (4.2)
*Net weight includes battery.
Standard equipment
Battery cover ......................... 2 pcs
Plastic carrying case ............. 1 pc
Hook ..................................... 1 pc
Note: The standard equipment for the tool shown may differ by country.
Optional
accessories
Assorted socket bits
Assorted Phillips bits
Stopper for impact driver
Battery 1822 (2.0Ah/ Ni-Cd)
Battery 1834 (2.6Ah/ Ni-MH)
Battery 1835 (3.0Ah/ Ni-MH)
Battery PA18 (1.3Ah/ Ni-Cd)
Charger DC1804
Automotive charger DC1822
P2/8
Repair
CAUTION: Remove the battery from the machine for safety before repair/ maintenance !
[1] NECESSARY REPAIRING TOOLS
Code No.
Description
Use for
1R045
Gear extractor
Disassembling the Hammer mechanism
1R223
Torque wrench shaft 20-90 N.m
Removing Hammer case complete
1R224
Ratchet head 12.7
Modular use with No.1R223
1R288
Screwdriver magnetizer
Removing Steel balls
1R291
Retaining ring S and R pliers
Disassembling the Bit holder section
1R346
Center attachment
Modular use with No.1R045
Socket 30-78
Modular use with No.1R223
134847-1
[2] LUBRICATION
Apply Makita grease N. No.2 to the following portions designated with the black triangle to protect
parts and product from unusual abrasion.
Item No.
19
Description
Portion to lubricate
Surface that contacts Hammer case complete
Anvil M
Insertion hole for
Spindle
20
Hammer
Groove for twenty four 3.5 Steel balls
25
Steel ball 5.6 (2pcs)
Whole surface
26
Spur gear 22 (2pcs)
Teeth portion
27
Spindle
Insertion hole for Armature (Put 2g in the hole.)
28
Pin 5 (2pcs)
Surface that that contacts
Spur Gear 22
(This pin is the gear shaft for
.)
34
Internal gear 51
Teeth portion
Fig. 1
Steel ball 3.5 (24pcs)
Hammer case comp.
Steel ball 3.5
Compression
Flat washer 24 spring 25
Cup washer 14
Armature
P3/8
Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Bit Holder Section
Fig. 2
DISASSEMBLING
See Fig. 2.
Ring spring 11
1) Remove Ring spring 11 from the groove on Anvil M
using Retaining ring S and R pliers (No.1R291).
Flat washer 12
2) Now the following parts can be removed from Anvil M:
Flat washer 12, Compression spring 13,
Sleeve, Steel ball 3.5 (2pcs)
Steel ball 3.5 (2pcs)
groove
ASSEMBLING
Do the reverse of the disassembling steps.
Note: Before putting Sleeve through Anvil, apply grease
to Anvil as described in [2] LUBRICATION.
Compression spring 13
Sleeve
Anvil
[3] -2. Hammer Case Complete
DISASSEMBLING
Note: You need not remove the Bit holder section
1) Remove PT3x10 Tapping screw, and pull LED circuit out of Housing. Remove Stopper by removing PT3x16
Tapping screw. Then remove Bumper from Hammer case complete. (Fig. 3)
Fig. 3
LED circuit
of Switch unit
Stopper
Bumper
Tapping screw
PT3x16
Tapping screw PT3x10
2) Fix the machine in vise, and remove Hammer case complete by turning clockwise with three repair tools
as illustrated in Fig. 4.
3) The machine can now be disassembled as illustrated in Fig. 5.
Fig. 4
Fig. 5
Assembly of Anvil
and Bit holder section
Torque wrench shaft 20-90N.m
(No.1R223)
Ratchet head 12.7
(No.1R224)
Hammer case comp.
Socket 30-78
(No.134847-1)
Fit Socket 30-78
to the hex portion
of Hammer case
complete.
Internal gear case
Hammer case comp.
O ring 46
Ring 41
Internal gear 51
Hammer mechanism
P4/8
Repair
[3] -2. Hammer Case Complete (cont.)
ASSEMBLING
Do the reverse of the disassembling steps.
Note 1: Do not forget to put O ring 46 in the groove on Internal gear case. (Fig. 5)
Note 2: When fastening Gear case complete to Internal gear case, turning Gear case complete counterclockwise
to the recommended torque of 30 - 40N.m. (Refer to Fig. 4.)
Note 3: Stopper is not reversible when fastened to Housing. Be sure to install as illustrated in Fig. 6.
Fig. 6
Correct
Wrong
Stopper
[3] -3. Housing L/Housing R and Motor Section
Fig. 7
DISASSEMBLING
Internal gear case
1) Remove parts until Internal gear case is revealed as described in [3] -2. Carbon brush
2) After removing Carbon brushes, remove four M4x12 Pan head screws
that fasten Internal gear case to Housing L and Housing R. (Fig. 7)
Note: Threadlocker is applied to the M4x12 Pan head screws,
It is, therefore, recommended to use impact driver for removal.
3) Unscrew eight PT3x16 Tapping screws, then remove Internal gear case.
Housing R can now be separated from Housing L. (Fig. 8)
Brush holder
4) The inner electric parts can be removed from Housing L. (Fig. 9)
cap
Fig. 8
Pan head screw
M4x12
Fig. 9
Internal gear case
Motor section
F/R Change lever
Switch unit
(with LED)
Housing R
Housing L
Housing L
Terminal section
P5/8
Repair
[3] -3. Housing L/Housing R and Motor Section (cont.)
DISASSEMBLING
5) Remove the Motor section from Housing L. Then remove Endbell complete from Armature. (Fig. 10)
6) Put the Motor section on a work bench so that the drive end of Armature touches the work bench.
Then separate yoke unit from armature by pulling it down towards the work bench. (Fig. 11)
Fig. 10
Fig. 11
Yoke unit
Armature
Endbell complete
Yoke unit
ASSEMBLING
1) Assemble the Motor section.
Note 1. Yoke unit is not reversible when assembled to Armature. Be sure to assemble so that the notch in Yoke unit is
positioned on the drive-end of Armature as illustrated to left in Fig. 12. If assembled wrong, the Motor section cannot
be assembled to Housing (L).
Note 2. Because Yoke unit is a strong magnet, when assembling Armature to Yoke unit, be sure to hold the commutator
portion as illustrated to left in Fig. 13. Do not hold the Armature core as illustrated to right or your fingers will be
pinched between Yoke unit and the fan of Armature that is pulled strongly by the magnet force.
Fig. 12
Fig. 13
[Correct]
[Wrong]
[Correct]
[Wrong]
Your fingers can be pinched
and injured.
Notch
2) Assemble Rubber pin 4 to both Housing L and Housing R as illustrated in Fig. 14.
Note: Make sure that the Rubber pins are in place on Housing L and R before assembling the housings together.
3) Mount the Motor section on housing L with the projection on Housing L fit in the notch of Yoke unit. (Fig. 15)
Fig. 14
Fig. 15
notch
Switch
projection
Housing R
Housing L
Rubber pin 4
Housing L
P6/8
Repair
[3] -3. Housing L/Housing R and Motor Section (cont.)
ASSEMBLING
4) Assemble F/R Change lever to switch unit with the projection Fig. 16
on Switch unit fit in the loop portion of F/R Change lever.
loop portion
(Fig. 16)
5) Mount Switch unit and the Terminal section on Housing L.
6) Assemble Housing R to Housing L. ( Fig. 8)
7) Secure Internal gear case to Housing with four M4x12 Pan
head screws. (Fig. 7)
Note : If you reuse removed M4x12 Pan head screws, apply
threadlocker to the screws. Recommended threadlocker are
projection
Threebond 1321B/ 1342, Loctite 242
F/R Change lever
[3] -4. Hammer Mechanism and Spindle Section
DISASSEMBLING
1) Remove Hammer case complete, and take out the Hammer mechanism as described in [3] -2.
2) Press down Hammer to the full with Large gear extractor (No.1R045) by turning the handle in the direction
of the black arrow. Then adjust the notch for Steel ball insertion to the top of the cam groove on Spindle
by turning the handle in the opposite direction. (Fig. 17)
3) Remove two 5.6 Steel balls from Spindle using tweezers or a slotted screwdriver magnetized with Screwdriver
magnetizer (No.1R288). (Fig. 17)
4) Turn over the Hammer mechanism as illustrated in Fig. 18, then turn the handle in the direction of the black arrow
to release the Hammer mechanism.
Caution: Do not hold gear extractor as illustrated in Fig. 17 when releasing the Hammer mechanism.
Failure to follow this instruction could cause most of twenty-four 3.5 steel balls to fall out of Hammer.
Fig. 17
Fig. 18
Spindle
Steel ball 5.6
top of cam groove
on Spindle
Hammer
opening for Steel
ball insertion
P7/8
Repair
[3] -4. Hammer Mechanism and Spindle Section (cont.)
DISASSEMBLING
5) Now Hammer mechanism can be disassembled as illustrated in Fig. 19.
6) After removal of Flat washer 24, twenty-four 3.5 Steel balls can be removed from Hammer. (Fig. 20)
Fig. 19
Fig. 20
Spindle section
Pin 5
Flat washer 12
Cup
washer 14
Hammer
Steel ball 3.5
(24 pcs.)
Compression
spring 25
Spur gear 22
Spindle
Flat washer 24
Hammer
ASSEMBLING
1) Put twenty-four 3.5 Steel balls into the groove of Hammer. (Fig. 21)
Note: As illustrated to right in Fig. 21, the groove is designed to have a space equivalent to one 3.5 Steel ball
when twenty-four 3.5 Steel balls are correctly installed.
2) Then do the reverse of the disassembling steps.
Fig. 21
Steel ball 3.5 (24 pcs)
Hammer
Steel ball 3.5
(24 pcs)
Hammer
space equivalent to
one 3.5 Steel ball
P8/8
Circuit
diagram
Endbell
FET
(Field Effect Transistor)
Color index of lead wires' sheath
Black
Red
White
LED circuit section
of Switch
Switch
Wiring
diagram
1) Before Installation of Internal Electric Parts
Place the slack of LED
lead wires here.
LED circuit section
of Switch
Boss
Put the lead wires (black, red) of LED
deep in these lead wire holders.
2) After Installation of Internal Electric Parts
Motor
FET
Route the Endbell lead wire (black)
between FET and the rib.
Endbell complete
Switch
Rib