Section 150-0020
SM 1971 4-00
1
DESCRIPTION
The differential assembly is mounted to the axle
housing. It comprises of two differentials; one for the
normal cross-axle drive function; the other for the thru-
drive.
The differential is a spiral bevel ring gear type with an
automatically limited slip element (See Fig. 2).
The thru-drive differential is lockable by the operator.
Note: Never engage or disengage the Differential
Lock when moving or when the wheels are spinning.
REMOVAL AND INSTALLATION
Numbers in parentheses refer to Fig. 1.
WARNING
To prevent personal injury and property
damage, be sure wheel blocks, blocking
materials and lifting equipment are properly
secured and of adequate capacity to do the job
safely.
1. Position the vehicle in a level work area, raise the
body and install the body safety prop to secure the
body in the partially raised position.
2. Apply the parking brake and switch off the engine.
3. Block all road wheels, place the steering lock bar in
the 'Locked' position and the battery master switch in
the 'Off' position.
4. Drain the gear oil out of the axle housing and both
planetaries into a suitable container.
5. Remove the planetary assemblies and axle shafts
from the axle housing. Note from which side the long
CENTRE AXLE - Differential Drive Head
and short axle shafts are removed. Refer to
Section 160-0030, AXLE GROUP (HUB).
6. Identify the relationship of the front and rear
driveline flanges and differential flanges with punch
marks.
7. Disconnect the drivelines from the differential
flanges. The drivelines can be removed if it is
convenient to do so.
8. Support the weight of the thru-drive differential and
countershaft case assembly with suitable lifting
equipment. Remove bolts (50 & 74) securing
countershaft case (49) to differential housing (73) and
carefully remove countershaft case (49) assembly
clear of differential housing (73).
9. Support the weight of differential housing (73)
assembly with suitable lifting equipment. Remove bolts
(75) securing differential housing (73) to the axle
housing. Thread in three puller bolts to break the seal
between the differential and axle housing and to
partially pull the differential assembly out of the axle
housing. Carefully remove differential housing (73)
assembly clear of axle housing. Remove shim (72).
INSTALLATION
Installation is the reversal of the 'Removal' procedure.
Note: Use sealing compound between the axle
housing and differential housing mounting faces.
Note: Tighten all fasteners to standard torques listed
in Section 300-0080, AXLE BOLT AND NUT TORQUE
SPECIFICATIONS.
Add gear oil of the type specified in Section 300-0020,
LUBRICATION SYSTEM, through the differential filler/
level hole until the oil is level with the bottom of the
filler/level hole. Fill the planetary assemblies up to the
'Oil Level Check Line'.
Courtesy of Machine.Market
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