Axle Assembly Repair
1600 SRM 974
Assemble
1.
Apply clean hydraulic oil to all the pump compo-
nents before assembly.
2.
Align and install the idler gear and drive gear in
the pump body. Install new O-rings in the pump
body.
3.
Install both bushings on the shafts. Install the
seals and backup rings in the body of each of the
bushings.
4.
Align the load-sensing valve assembly, pump
body, and mounting flange. Install the four cap-
screws. Tighten the capscrews to 68 to 74 N•m
(50 to 55 lbf ft).
5.
Install a new shaft seal on the drive gear shaft.
WARNING
Be careful when removing or installing snap
rings. These snap rings can come loose dur-
ing removal or installation with enough force
to cause an injury. Always use the correct snap
ring pliers, and wear eye and face protection
during removal and installation.
6.
Install a new snap ring.
7.
Install new O-rings on the fittings and elbows.
Install the fittings and elbows in the pump. In-
stall the pilot relief valve and load-sensing valve
in the pump body. Make sure the valves are prop-
erly adjusted.
8.
Align the splined shaft of the pump with the mo-
tor and insert the shaft in the motor. Install the
two lockwashers and capscrews.
Axle Assembly Repair
GENERAL
The axle assembly has an articulated axle weldment,
which is a mount for the master drive unit (MDU),
hydraulic steering motor, and the caster. The trac-
tion motor fastens to the top of the MDU near the
left end of the axle weldment. The MDU is fastened
to the bottom of the weldment and rotates on a large
bearing. The traction motor supplies the power to
turn the drive wheel for travel. The hydraulic steer-
ing motor rotates the MDU for steering. The caster
supports the right end of the weldment. The artic-
ulated axle assembly is fastened to the lift truck by
a shaft and articulates (tilts) on the shaft for better
traction of the drive tire.
TRACTION MOTOR
Description
The traction motor is not part of the steering system.
The motor is part of the MDU assembly and must be
removed to remove the axle from the lift truck.
Remove
1.
Disconnect the battery.
Open the door to the
drive unit compartment.
2.
Put labels on the power cables of the traction mo-
tor for correct identification during installation.
The motor terminals are identified on the motor
as A1, A2, S1, or S2.
3.
Tag and disconnect the wires to the brake switch.
CAUTION
Brake fluid damages paint.
Immediately re-
move any brake fluid that is on a painted sur-
face.
4.
Position a container under the slave cylinder to
catch the brake fluid and disconnect the hose as-
sembly. Cap the hose assembly. Allow the brake
fluid to drain from the slave cylinder.
5.
Make a mark on the motor housing and the axle
weldment for correct motor alignment during in-
stallation. Remove the six M8 capscrews and
lockwashers that fasten the flange of the traction
motor to the MDU bearing housing.
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