Operation and maintenance manual

Section 150-0020
SM 2149 5-02
3
Centre Axle - Differential Drive Head
Driveshafts
1. Remove bolts (4, Fig. 2) and washers (3, Fig. 2).
2. Using suitable lifting equipment, pull off planet
carrier assembly (8, Fig. 2) and place on bench, small
diameter down.
3. Pull out driveshaft assembly (1, Fig. 2) from hub to
disengage the shaft splines from wheel (97).
4. Cover open end of hub unit to prevent entry of dirt.
5. Repeat steps 1 through 4 for other hub end.
Drive Head Unit from Axle Casing
1. Remove nuts (74) and spring washers (75) from
studs (81).
2. Withdraw 3rd differential shaft (73) along with rear
end cap (76), oil seal (77), bearing (78), lockplate (79),
and shaft nut (80).
3. Fit 'U' bolts to coupling flange (2) and using suitable
lifting equipment, rotate axle so that 3rd differential
housing is uppermost. Leave lifting equipment in place.
4. Remove nuts (105) and spring washers (104).
5. Remove wheel nuts then pull off road wheels.
6. Identify the relationship of both driveline flanges to
coupling flange (2) and 3rd differential shaft (73).
Disconnect drivelines and secure clear of drive head.
Drivelines may be removed if convenient to do so.
Refer to Section 130-0020, REAR DRIVELINES.
7. Loosen coupling flange nut (1) but do not remove.
8. Disconnect breather tube (83) from adaptor (132).
9. Remove centre axle from vehicle and place on a
suitable axle stand. Refer to Section 180-0040, REAR
SUSPENSION.
Note: As there is no oil sealing between the drive head
and the hubs, the oil must be drained from all three
units before overhaul.
10. Place suitable containers under the drive head and
both hubs.
11. Rotate hubs to bring bolts (6, Fig. 2) to their lowest
point. Unscrew and remove filler/level plugs (7, Fig. 2).
Remove bolts (6, Fig. 2) and washers (5, Fig. 2) to
drain the oil from the hubs.
12. Unscrew and remove oil filler/level plug (82) and
drain plug (84) to drain oil from drive head.
SM - 033
Fig. 2 - Part View of Hub Reduction Unit
5 - Washer
6- Bolt
7 - Oil Filler/Level Plug
8 - Planet Carrier
1 - Driveshaft Assembly
2- Hub
3 - Washer
4- Bolt