Operation and maintenance manual

Section 100-0020
SM 1373 Rev 2 8-03
9
Chassis - Articulation and Oscillation Pivot
2. Inspect nylon oscillation bushes for wear, scoring,
erosion and 'out of round'. Pay particular attention to
the thrust faces of the bushes which should also be
inspected for cracking/splitting. Renew if required.
3. Replace all seals with new parts.
Assembly
Numbers in parentheses refer to Fig. 1.
Note: Tighten all fasteners without special torques
specified to torques listed in Section 300-0080,
STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
WARNING
To prevent personal injury and property
damage, be sure wheel blocks are properly
secured and of adequate capacity to do the job
safely.
1. Wipe bush housing clean using a suitable solvent
and allow to dry.
2. Apply Loctite 648 (3) and Loc Quick Primer (4) and
align new bushes (2) to housing with grease holes
aligned vertically and identification 'PAINT DOT' at Top
Dead Centre. Refer to Fig. 4. Drift bushes (2) into
housing using hammer with soft packing for protection.
3. Install plug (25) in filler/level hole on pivot assembly
(1). Install gasket (5) and cover plate (6) on side of
oscillation hub and secure with bolts (7) and washers
(20).
4. Install plug (25) in cavity drain port on underside of
oscillation hub.
5. Install plugs (28) into oscillation bearing grease
ports.
6. Lightly coat 'V' ring (10) and machined surfaces of
pivot with Extreme Pressure Multipurpose Grease (26)
and, install 'V' ring (10), with lip towards rear, on front of
oscillation hub.
7. Using suitable lifting equipment, and taking care to
prevent damaging bushes (2) or pivot threads, install
pivot assembly (1) into rear frame.
8. Lightly coat 'V' ring (10) and machined surfaces of
pivot with Extreme Pressure Multipurpose Grease (26)
and, install 'V' ring (10), with lip towards front, on rear of
oscillation hub.
9. Thread thrust nut (11) on pivot assembly (1) and
tighten as follows:
a) 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
trestles or stands. See Fig. 3.
b) Secure a suitable tool to pivot thrust nut (11) and
tighten thrust nut (11) until there is no end float/
clearance at thrust face of either bush. Slacken thrust
nut (11) until pin of the locking plate (12) can be
inserted in the first available hole in the thrust nut (11).
c) Secure locking plate (12) with bolts (22) and
lockwashers (21). Torque tighten bolts (22) to 94 Nm
(69 lbf ft).
10. Install adaptor (57), connector (58), elbow (59) and
pipe assembly (60) to oscillation hub.
11. Install brake yoke (18) on driveshaft (14) until it
butts against bearing assembly cup and cone (8 & 9).
12. Install parking brake disc on brake yoke (18) and
secure with bolts, washers and nuts. Tighten bolts to a
torque of 73 Nm (54 lbf ft).
13. Install thrust washer (16) on rear of driveshaft (14).
14. Install nut (19) at rear of driveshaft (14), and tighten
nut (19) to a torque of 250 Nm (180 lbf ft) to seat
bearing cup and cone (8 & 9) assemblies.
15. Chap driveshaft (14) at both ends with a hide-faced
hammer. Re-torque nut (19) to 250 Nm (180 lbf ft).
16. Back off nut (19) four flats, and chap rear end of
driveshaft (14) with a hide-faced hammer to remove
Fig. 4 - Installing Oscillation Bushes
SM - 011
PAINT DOT