Operation and maintenance manual

SM 2149 5-02
Centre Axle - Differential Drive Head
Section 150-0020
2
DESCRIPTION
Drive is transmitted through a lockable bevel type inter-
axle differential to single drop helical gears which drive
a spiral bevel pinion mounted on a roller nose bearing
and spaced taper roller bearings.
The crownwheel is of heavy section, also running on
taper roller bearings.
The main differential is a POWR LOK torque bias unit
which maintains traction at both wheels. The design
ensures that both the engagement and disengagement
action of the POWR LOK unit does not produce any
shock torsional loads in the driveshafts.
REMOVAL
Numbers in parentheses refer to Fig. 1, unless
otherwise specified.
WARNINGS
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.
Draining the Oil
1. Position the vehicle (preferably after a short run to
warm the oil) on a level, solid concrete floor, apply the
parking brake and switch off the engine.
2. Block appropriate road wheels and turn the battery
master switch to the 'Off' position.
3. Whilst road wheels are still on the ground, loosen
wheel nuts of each wheel.
4. Jack up chassis until the tyres are clear of ground
and support with suitably placed stands or timbers.
LEGEND FOR FIG. 1
1 - Flange Nut
2 - Coupling Flange
3 - Front End Cap
4 - Oil Seal
5 - Washer
6 - Bearing
7 - Filler Plug
8 - Setscrew
9 - Spring Washer
10 - 3rd Differential Housing
12 - Cage Half - Shaft
13 - Thrust Washer
14 - Wheel (Outer)
15 - Wheel (Inner)
16 - Thrust Washer
17 - Cage Half
18 - Retainer Plate
19 - Shims
26 - Helical Gear Housing
28 - Setscrew
29 - Locknut
30 - Bearing Cup
30A - Bearing Cone
31 - Helical Pinion
32 - Bearing Cup
32A - Bearing Cone
33 - Spiral Bevel Pinion
34 - Nose Bearing
35 - Shim
37 - Dowel
38 - Plug
39 - Gear Casing
40 - Air Cylinder
41 - Capscrew
42 - Operating Shaft
43 - Retaining Spring
44 - Operating Fork
45 - Bolt
46 - Crownwheel
47 - Stud
48 - Differential Housing Body
49 - End Flange
50 - Nut
51 - Adjusting Nut
52 - Bearing Cup
52A - Bearing Cone
53 - Thrust Washer
63 - Clutch Dog
64 - Axle Casing
73 - 3rd Differential Shaft
74 - Nut
75 - Spring Washer
76 - Rear End Cap
77 - Oil Seal
78 - Bearing
79 - Lockplate
80 - Shaft Nut
81 - Stud
82 - Oil Filler/Level Plug
83 - Breather Tube
84 - Drain Plug
85 - Stud
87 - Nut
88 - Washer
89 - Strap
90 - Split Pin
91 - Friction Plate
92 - Nut
93 - End Flange
95 - Clutch Plate
96 - Cage Half
97 - Wheel
98 - Trunnion
99 - Pinion
100 - Stud
101 - Lockpin
102 - Washer
103 - Difflock Switch
104 - Spring Washer
105 - Nut
110 - Bearing Cup
110A - Bearing Cone
111 - Spacer - Wide
112 - Spacer - Narrow
113 - Bearing Housing
114 - Setscrew
115 - Bearing Cup
115A - Bearing Cone
116 - Helical Gear
117 - End Nut
118 - Washer
119 - Bolt
120 - Stud
121 - Capscrew
122 - Trunnion
123 - Bush
124 - Pinion
125 - Thrust Washer
126 - Bolt
128 - Nut
129 - Stud
130 - Spring Washer
131 - Nut
132 - Adaptor