Operation and maintenance manual
Section 160-0020
7
SM 2151 6-02
Nm).
3. If a new crownwheel and pinion (11 & 37) are to be
fitted, proceed as follows:
a) Insert shims (39) of 0.025" (0.6 mm) nominal
thickness between pinion bearing housing (24) and
bevel casing (40).
b) Fit pinion bearing housing setscrews and washers
(32 & 31) to secure pinion bearing housing (24) to bevel
casing (40) then tighten to 180 - 200 lbf ft (244 - 271
Nm).
c) Assemble setting gauge
into bevel casing (40) as
shown in Fig. 8 and secure with bevel straps (49).
d) Using feeler gauges, measure gap 'Y' between
setting gauge and pinion nose. The gap should
measure 0.025" (0.6 mm) plus figure 'Z' which is etched
on pinion nose. Adjust shim pack thickness as required
to give correct measurement.
Differential Unit
1. If crownwheel (11) has been separated from
differential housing body (13) refit as follows:
a. Heat crownwheel to a temperature of approximately
150° C (300° F). This is necessary to ensure that
crownwheel fits onto register on differential housing
body (13).
b. Place crownwheel (11) into position on differential
housing body (13), ensuring that bolt holes and
matching marks line up.
c. Install two bolts (19) diagonally opposite, through
crownwheel and differential housing body (13) then
allow assembly to cool fully.
d. Install end flange (14) aligning matching marks and
grooves in end face with those in differential housing
body. Install remaining bolts (19) and nuts (18) then
tighten to a torque of 155 - 171 Nm (114 - 126 lbf ft).
2. Place assembly on bench with end flange (14)
downwards. Check tightness of studs (12) and if
necessary tighten to a torque of 19 - 22 Nm
(14 - 16 lbf ft).
3. Soak friction plates (10) in gear oil prior to installing
and lightly oil differential components before assembly.
4. Install first thrust washer (15) into bore of end
flange (14).
5. Slide steel clutch plate (44) then friction plate (10)
Rear Axle Group - Differential Drive Head
Fig. 10 - Pinion/Diff Wheel Arrangement
SM - 2741
Fig. 9 - Measuring Thickness of
Clutch Plates and Diff Cage Half
TOTAL
THICKNESS
EQUAL AT BOTH
SIDES OF DIFF
SM - 1182
Fig. 8 - Method Of Setting Pinion Depth
SM - 2739