Operation and maintenance manual

Section 180-0020
Suspension System - Front Suspension
SM 2119 2-02
2
(5 & 6) there are four heavy duty double acting shock
absorbers (3) (two off each side) to smooth out the
ride. Two chain and shackle assemblies (28) and
rubber rebound mounts (7) provide extra retention on
rebound.
REMOVAL
Numbers in parentheses refer to Fig. 1.
WARNING
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.
1. Position the vehicle in a level work area, ensure
the body is fully lowered, apply the parking brake and
switch off the engine. Turn steering wheel several
times to relieve any pressure in the steering system.
2. Block rear road wheels, place the steering lock bar
in the 'Locked' position and place the battery master
switch in the 'Off' position.
3. Whilst the front road wheels are still on the ground,
loosen the wheel nuts.
4. Using suitable lifting equipment, raise the machine
until both front tyres are off the ground. Support the
vehicle with suitable stands and blocking at the
tractor frame and articulation pivot area.
5. Support one tyre and rim assembly with suitable
lifting equipment and remove wheel nuts securing the
rim to the axle. Remove tyre and rim assembly.
6. Repeat step 5 for the opposite tyre and rim
assembly.
7. Support guard (35) and remove bolts (20 & 37),
washer (34) and lockwasher (36) securing guard (35) to
suspension frame (1). Remove guard (35).
8. Disconnect hydraulic brake line at tee on front axle
assembly. Disconnect differential breather line. Cap
lines and fittings to prevent ingress of dirt.
9. Remove nuts (31), lockwashers (30) and bolts (29)
securing chain and shackle assemblies (28) to
suspension frame (1) and tractor frame assembly.
10. Support driveline and remove bolts securing
driveline to front axle. Refer to Section 130-0010,
FRONT DRIVELINES.
11. Remove thread cap and mounting hardware securing
shock absorbers (3) to suspension frame (1).
12. Support rebound mounts (7) and remove nuts (19),
washers (27) and shackles (38) securing rebound
mounts (7) to suspension frame (1). Remove bolts (39)
and locknuts (40) securing chains (9) to bolts (8).
13. Remove rebound mounts (7), bolts (8) and
snubbing washers (2) from suspension frame (1).
14. Support panhard rod (11) and remove locknuts (23),
hardened washers (24) and bolts (16) securing panhard
rod (11) assembly to suspension frame (1).
15. Support link (4) and remove locknuts (22), washers
(26) and bolts (14) securing link (4) to suspension
frame (1).
16. Position two jacks under the leading arms of
suspension frame (1) and remove bolts (18) and
hardened washers (25) securing rubber mounts
(5 & 6) to the tractor frame. Lower jacks until rubber
mounts are free of compression.
17. Position a suitable trolley under suspension frame
(1) and, using suitable equipment, support the rear
end of suspension frame (1).
18. Remove locknuts (21), hardened washers (25),
bolts (15) and bushes (13) securing bearing (12) to the
tractor frame.
19. Carefully lower suspension frame (1) assembly
onto the trolley and remove from under the vehicle.
20. Remove cap from shock absorber (3) mounting
nuts and remove nuts and washers securing shock
absorbers (3) to the tractor frame assembly. Remove
shock absorbers (3).
21. Support panhard rod (11) assembly and remove
locknuts (23), hardened washers (24) and bolts (16).
Remove panhard rod (11) assembly from the tractor
frame assembly.