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 b. Installation. Install the drive motor in the reverse
Raise the jack enough to take the stress from the axle
mounting screws.
order of removal.
(5) Remove the screws and lock washers
2-23. Drive Motor and Drive Axle
securing axle mounting housing to truck frame.
a. Removal. To remove the drive motor and drive
(6) Lower the axle from under the truck.
axle as a unit, proceed as follows.
b. Installation. Install the steer axle in the reverse
(1) Remove mast assembly (para 2-19).
order of removal. Make steering adjustments (TM 10-
(2) Disconnect
battery
and
discharge
3930-620-121.
capacitors (para 2-5).
2-22. Drive Motor
(3) Remove toe and floor plates (TM 10-3930-
a. Removal. The drive motor can be removed with
620-12).
or without the drive axle assembly. To remove only the
(4) Disconnect brake line at interconnecting
motor, proceed as follows.
tee and remove line from master cylinder. Remove
(1) Disconnect
battery
and
discharge
brake line bracket attached to drive motor flange.
capacitors (para 2-5).
(5) Tag and disconnect drive motor cabling.
(2) Remove toe and floor plates (TM 10-3930-
(6) Remove yoke pin from seat brake
620-12).
actuating lever and remove screws securing seat brake
(3) Disconnect brake line at interconnecting
bracket assembly to drive motor housing.
tee and remove brake line bracket attached to drive
(7) Place a transmission jack, or suitable
motor flange.
device, under the drive motor and drive axle. Raise jack
(4) Tag and disconnect drive motor cabling.
enough to support motor and axle assembly.
(5) Remove yoke pin from seat brake
(8) Remove screws securing drive unit to
actuating lever and remove screws securing seat brake
truck frame.
bracket assembly to drive motor housing.
(9) Check all lines, hoses, cables, wires, and
(6) Place a transmission jack, or suitable
linkage to make certain none will be damaged during
device, under the drive motor. Raise jack enough to
removal.
support motor.
(10) Attach hoist securely to front of truck
(7) Drain differential housing oil and if oil is to
frame and raise truck carefully, making certain all lines,
be reused, make certain a clean receptacle is used.
hoses, cables, wires, and linkage stay clear of the motor
(8) Remove nuts securing motor to carrier.
and axle assembly. Raise enough to allow the assembly
(9) Check all lines, hoses, cables, wires, and
to be moved from under the truck.
linkage to make certain none will be damaged during
(11) Carefully pull assembly out from under
removal.
truck.
Caution: When cleaning with a solvent, always
Caution: Make certain shims between motor
use in a well ventilated area.
and carrier are not damaged when removing motor.
(12) Clean exterior with a solvent such as
When assembling motor to carrier, shims must be in
mineral spirits. Dry with compressed air.
the same order and position as when motor was
(13) Drain differential housing oil. If oil is to be
removed.
reused, drain into a clean receptacle.
(10) Carefully separate motor housing from
(14) Remove screws and nuts securing motor
carrier. Carrier will remain with drive axle.
to carrier and drive unit housing.
(11) Attach hoist securely to front of truck
Caution: Make certain shims between motor
frame and raise truck carefully, making certain all lines,
and carrier are not damaged when removing motor.
hoses, cables, wires, and linkage stay clear of the motor.
When assembling motor to carrier, shims must be in
Raise enough to allow the drive motor to be moved from
under the truck.
the same order and position as when motor was
(12) Carefully pull motor out from under truck.
removed.
Caution: When cleaning with a solvent,
(15) Carefully separate motor housing from
always use in a well ventilated area.
carrier and remove motor from assembly. Carrier will
(13) Clean exterior with a solvent such as
remain on drive unit studs.
b. Installation. Install the drive motor and axle in
mineral spirits. Dry with compressed air.
the reverse order of removal.
2-17
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