Transmission
9803/3280 Issue 1
15 - 2 15 - 2
Basic Operation
Section F Section F
Rear Axle - Steer Drive Type SD80
Component Identification
The illustration shows a typical steer drive rear axle. 2WS
machines are fitted with non steer axles (PD70). These axles
are similar to the axle shown but do not feature steer swivels
or drive shaft universal joints.
A Park brake disc. The disc is fitted to the pinion instead of a yoke. The propshaft is bolted to the
centre of the disc. The axle casing also carries a bracket for location of the park brake caliper.
B Pinion
C Crownwheel
D Differential unit
Note: Items A, B, C, and D form the ‘drive head’ part of the axle.
E Drive shaft
F Universal coupling
G Reduction gear hub
H Steer swivel trunnion bearings
L In-board oil immersed multi-plate disc brakes
M Brake actuating piston
N Hydraulic brake lines
A396760
C
A
B
D
N
M
L
E
H
F
G
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