Operation and maintenance manual

Section 100-0020
Chassis - Articulation and Oscillation Pivot
SM 1373 Rev 2 8-03
8
the pin and pin bores by raising or lowering the pivot/
rear frame assembly.
14. Remove bolt (48) and hardened washer (44)
securing lower pin (43).
15. Remove lower pin (43). If necessary tap lower pin
(43) to ease removal taking care to avoid damaging the
pin.
16. Remove blocks from rear wheels and use lifting
equipment to pull pivot/rear frame assembly clear of
the front frame. After moving, block pivot/rear frame
assembly and block the wheels.
17. Remove spacer (39) noting orientation to ensure
correct installation. Cover articulation bearings to
prevent ingress of dirt.
Disassembly
1. Remove protective guard (if fitted) from beneath
parking brake disc by removing mounting hardware
securing guard to the rear frame. Refer to
Section 170-0010, PARKING BRAKE AND
MOUNTING.
2. Remove mounting hardware securing parking brake
assembly to mounting bracket on frame. Remove and
secure parking brake assembly clear of brake disc.
3. Identify the relationship of the driveline caps to
brake yoke (18). Remove capscrews, disconnect
driveline and secure clear of brake yoke (18).
4. Remove mounting hardware securing parking brake
disc to brake yoke (18) and remove brake disc.
5. Place a suitable container under rear brake yoke
(18) to catch oil released when pulling brake yoke (18)
from driveshaft (14).
6. Remove rear nut (19) and thrust washer (16) from
driveshaft (14) and pull brake yoke (18) from
driveshaft (14). Reinstall nut (19) on driveshaft (14) to
protect the threads.
7. Remove adaptor (57), connector (58), elbow (59)
and pipe assembly (60) from oscillation hub.
8. Remove bolts (22) and washers (21) securing
locking plate (12). Remove locking plate (12).
9. Restrain pivot assembly (1) to prevent it oscillating,
by placing a heavy bar between the steering cylinder
mountings. Lock the bar in position using suitable
SM - 038
Fig. 3 - Preventing Pivot Assembly From Oscillating
trestles or stands. See Fig. 3.
10. Using a suitable tool, remove thrust nut (11). If
wear area of thrust nut (11) is damaged, replace thrust
nut (11).
11. Insert an M20 eyebolt into tapped pad provided on
top of pivot assembly (1) and attach suitable lifting
equipment.
12. Remove pivot restraining bar.
13. Using lifting equipment, carefully pull pivot
assembly (1) clear of oscillation hub. Place pivot
assembly (1) in a suitable work area for further
disassembly.
14. Reinstall thrust nut (11) on pivot assembly (1) to
protect the threads.
15. Note position of front 'V' ring (10) to aid in
'Installation'. Remove and discard 'V' ring (10).
16. Inspect nylon oscillation bushes (2) as described in
'Inspection'. If bushes are to be renewed, proceed with
step 17.
17. Remove nylon oscillation bushes (2) with hammer
and chisel.
Note: The suggested method is to make an axial cut
along the bush then to lever the bush in order to
collapse it upon itself.
Inspection
1. Clean nylon oscillation bushes with a suitable
solvent and allow to dry.