Page 180 of 455

REAR AXLE AND FINAL DRIVE
1
DESCRIPTION AND OPERATION DESCRIPTION
The welded steel rear axle casing houses a separate
spiral bevel type differential unit, which is off set to the
right of the vehicle centre line. The differential unit
drives the rear wheels via the axle shafts and fully
floating hubs which are mounted on tapered roller
bearings.
Lubrication
The differential is lubricated with oil and the hub
bearings with grease.The hub bearings are fitted with inner and outer seals.
The outer seals prevent the differential oil mixing with
the hub grease and the inner seals prevent dirt
ingress into the hub.
Ventilation
Ventilation of the hub bearings is through the outer oil
seals and the differential ventilation pipe, which
terminates at a high level.
Rear axle hub - 90
1.Axle casing
2.Ventilation pipe
3.Axle shaft
4.Wheel studs and hub
5.Wheel bearing stub axle6.Wheel bearings
7.Inner hub seal
8.Outer hub/axle shaft seal
9.Hub lock plate, thrust washer and nuts
10.Brake disc
Page 181 of 455
51REAR AXLE AND FINAL DRIVE
2
DESCRIPTION AND OPERATION
Rear axle hub - 110/130
1.Axle casing
2.Ventilation pipe
3.Axle shaft
4.Wheel studs and hub
5.Wheel bearing stub axle
6.Wheel bearings
7.Inner hub seal8.Outer hub/axle shaft seal
9.Hub lock plate, thrust washer and nuts
10.Brake disc
11.Drive flange
12.Drive shaft circlip
13.Dust cap
Page 183 of 455
REAR AXLE AND FINAL DRIVE
1
REPAIR REAR AXLE
Service repair no - 51.25.01
Remove
WARNING: Remove and refit of axle
requires a further two persons to steady
the axle when lowering or repositioning
axle.
1.Drain brake system.
2.Support chassis rear.
3.Remove road wheels.
4.Support axle weight with hydraulic jack.
5.Disconnect shock absorbers.
6.Disconnect flexible brake hose at RH chassis
side member and breather hose at banjo
connection on axle casing.
7.Disconnect lower links at axle.8.Mark differential and propeller shaft flanges with
identification marks for assembly.
9.Remove 4 nuts and bolts, lower propeller shaft
and tie to one side.
10.Disconnect pivot bracket ball joint at axle
bracket.
11.Release bolts and remove coil spring retaining
plates.
12.Lower axle and remove road springs.
13.If applicable, remove anti-roll bar links at axle
See REAR SUSPENSION, Repair, anti-roll
bar
.
14.Remove axle assembly.
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51REAR AXLE AND FINAL DRIVE
2
REPAIRREV: 05/99 Refit
15.Position axle and fit lower links. Tighten fixings
to
176 Nm (130 lbf/ft).
16.If applicable, fit anti-roll bar links to axleSee
REAR SUSPENSION, Repair, Anti-roll bar
links
.
17.Raise axle and locate road springs.
18.Fit coil spring retaining plates and secure with
fixing bolts.
19.Secure pivot bracket ball joint to axle bracket.
Tighten fixing to
176 Nm (130 lbf/ft).
20.Align propeller shaft to differential drive flange
and tighten fixings to
47 Nm (35 lbf/ft).
21.Reconnect flexible brake hose and axle breather
hose.
22.Refit shock absorbers.
23.Fit road wheels and tighten to correct torque:
Alloy wheels -
130 Nm (96 lbf/ft)
Steel wheels -100 Nm (80 lbf/ft)
Heavy Duty wheels -170 Nm (125 lbf/ft)
24.Remove rear chassis support.
25.Bleed brake system
See BRAKES, Repair,
brake system bleed
.
Page 185 of 455
REAR AXLE AND FINAL DRIVE
3
REPAIR REAR HUB ASSEMBLY - 90
Service repair no - 64.15.01
Remove
1.Place rear axle onto axle stands and remove
road wheel.
2.Release brake hose clips and remove brake
caliper bolts. Secure to one side.
WARNING: Take care not to kink brake
hose.
3.Remove 5 bolts and withdraw axle shaft.
4.Remove joint washer.
5.Bend back lock washer tabs.
6.Remove locknut and lock washer.
7.Remove hub adjusting nut.
8.Remove spacing washer.
9.Remove hub and brake disc assembly complete
with bearings.
Rear hub components - 90
1.Axle shaft.
2.Axle shaft joint washer.
3.Axle shaft retaining bolt.
4.Lock nut.
5.Lock washer.
6.Hub adjusting nut.
7.Spacing washer.8.Outer bearing.
9.Hub.
10.Inner bearing.
11.Grease seal.
12.Brake disc.
13.Disc retaining bolt.
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51REAR AXLE AND FINAL DRIVE
4
REPAIRREV: 05/99 Refit
10.Clean stub axle.
11.Fit hub assembly to stub axle.
12.Fit spacing washer.
13.Fit hub adjusting nut. Tighten to
50 Nm (37
lbf/ft).
Ensure hub is free to rotate with no
bearing play. Back off adjusting nut 90°and
tighten to
10 Nm (7 lbf/ft).
14.Fit a new lock washer.
15.Fit locknut. Tighten to
50 Nm (37 lbf/ft).
16.Tab over lock washer to secure adjusting nut
and locknut.
17.Using a new joint washer fit axle shaft to hub.
Tighten bolts to
65 Nm (48 lbf/ft).
18.Fit brake caliper. Tighten bolts to82 Nm (61
lbf/ft).
Secure brake pipes to axle casing.
19.Fit road wheel, remove axle stands and tighten
road wheel nuts to correct torque:
Alloy wheels -
130 Nm (96 lbf/ft)
Steel wheels -100 Nm (80 lbf/ft)
Heavy duty wheels -170 Nm (125 lbf/ft)
20.Operate footbrake to locate brake pads before
driving vehicle.
Page 187 of 455
REAR AXLE AND FINAL DRIVE
5
REPAIR REAR HUB ASSEMBLY - 110/130
Service repair no - 64.15.01
Remove
1.Loosen rear wheel nuts, jack up vehicle and
lower onto axle stands. Remove road wheel.
2.Release brake pipe clips, remove brake caliper
and brake disc shield bolts. Secure to one side.
WARNING: Take care not to kink brake
hose.3.Lever off dust cap.
4.Remove circlip from driveshaft.
5.Remove 5 bolts and withdraw driving member
and joint washer.
6.Bend back lock washer tabs.
7.Remove locknut and lock washer.
8.Remove hub adjusting nut.
9.Remove spacing washer.
10.Remove hub and brake disc assembly complete
with bearings.
Hub components
1.Dust cap.
2.Drive shaft circlip.
3.Drive member.
4.Drive member joint washer.
5.Drive member retaining bolt.
6.Lock nut.
7.Lock washer.
8.Hub adjusting nut.9.Spacing washer.
10.Outer bearing.
11.Hub.
12.Inner bearing.
13.Grease seal.
14.Brake disc
15.Disc retaining bolt.
Page 188 of 455
51REAR AXLE AND FINAL DRIVE
6
REPAIRREV: 05/99 Refit
11.Clean stub axle and drive shaft and fit hub
assembly to axle.
12.Fit spacing washer.
13.Fit hub adjusting nut. Tighten to
50 Nm (37
lbf/ft).
Ensure hub is free to rotate with no
bearing play.
14.Back off adjusting nut 90°and tighten to
10 Nm
(7 lbf/ft).
15.Fit a new lock washer.
16.Fit locknut. Tighten to
50 Nm (37 lbf/ft).
17.Tab over lock washer to secure adjusting nut
and locknut.
18.Fit a new joint washer to driving member and fit
member to hub. Tighten bolts to
65 Nm (48
lbf/ft).
19.Fit circlip and dust cap.
20.Fit brake disc shield and brake caliper. Tighten
bolts to
82 Nm (61 lbf/ft).
21.Bleed brake systemSee BRAKES, Repair,
Brake system bleed
.
22.Fit road wheel, remove axle stands and tighten
road wheel nuts to correct torque:
Alloy wheels -
130 Nm (96 lbf/ft)
Steel wheels -100 Nm (80 lbf/ft)
Heavy duty wheels -170 Nm (125 lbf/ft)
23.Operate footbrake to locate brake pads before
driving vehicle.