Operation and maintenance manual
SM 2149 5-02
Centre Axle - Differential Drive Head
Section 150-0020
10
only, if not, it may be because of cross threading.
Remove and deburr. On no account use additional
pressure i.e. hammer.
5. Install washers (88) and temporarily install plain nuts
onto studs (100). Tighten nuts to a torque of
502 - 542 Nm (370 - 400 lbf ft.).
6. Check freedom of adjusting nuts (51) by unscrewing
and refitting, to assist this operation tap straps (89)
lightly on top with 1 kg (2 lb) hammer (See Fig. 11).
7. Having checked fit of adjusting nuts (51), remove
straps (89), bearing cups (52) and adjusting nuts (51).
Installing Crownwheel and Differential
Assembly into Gear Casing
1. Hold bearing cups (52) in position on bearing cones
(52A) and place crownwheel (46) and differential
assembly in position in gear casing (39).
2. Install adjusting nuts (51) onto half threads of gear
casing (39) legs. Re-check freedom of adjusting nuts
on threads.
3. Install two straps (89) onto studs (100) to locate on
bearing cups (52) and adjusting nuts (51).
Note: Ensure matching marks coincide to prevent
misalignment of straps (89).
4. Turn adjusting nuts (51) hand tight against bearings
(52 & 52A).
5. Install washers (88) and nuts (87). Tighten nuts to a
torque of 502 - 542 Nm (370 - 400 lbf ft) (See Fig. 12).
Setting ‘No End Float’ Condition
1. Set up dial indicator on back face of crownwheel
(46) as shown in Fig. 13 and screw in each adjusting
nut (51) just sufficiently to ensure that no crownwheel
axial movement is registered on dial indicator.
2. Tap straps (89) and rotate crownwheel (46), then
re-check that no axial movement is present.
3. Turn each adjusting nut (51) until nut slots line up
with one of the two split pin holes in straps (89). Install
two split pins (90) as shown in Fig. 14.
4. Set up dial indicator on crownwheel (46) and check
for 'No End Float' condition.
Fig. 11 - Checking Freedom of Bearing Adjusting Nut
SM - 1185
SM - 1186
Fig. 12 - Tightening Gear Casing Straps
Fig. 13 - Setting Dial Indicator on Crownwheel Backface
SM - 1187