Operation and maintenance manual

Section 100-0020
Chassis - Articulation and Oscillation Pivot
SM 1373 Rev 2 8-03
2
THRU-DRIVE DRIVESHAFT
Numbers in parentheses refer to Fig. 1, unless
otherwise specified.
Note: The following procedures assume that only
thru-drive components require repair.
Note: Tighten all fasteners without special torques
specified to torques listed in Section 300-0080,
STANDARD BOLT AND NUT TORQUE
SPECIFICATIONS.
WARNINGS
To prevent personal injury and property
damage, be sure wheel blocks are properly
secured and of adequate capacity to do the job
safely.
When necessary to drive out or drive on
components during disassembly/assembly, be
sure to use a soft drift to prevent property
damage and personal injury.
Removal and Disassembly
1. Position the vehicle on a level work area and apply
parking brake.
2. Raise body and install body safety prop to secure
body in partially raised position.
3. Shut down engine and block all wheels securely.
4. Identify the relationship of the driveline caps to the
transmission yoke and front yoke (17). Remove
capscrews and remove driveline from vehicle.
Note: Take extra care when handling drivelines as
any deformity on a rotating mass creates vibration
and excessive wear during any operation.
5. Remove wheel blocks, start engine and steer
vehicle into a full left-hand lock. Shut down engine
and block all wheels securely.
6. Remove front nut (19), lockwasher (50) and thrust
washer (16) from driveshaft (14). Reinstall nut (19)
temporarily onto driveshaft (14) to protect the threads.
7. Remove and discard 'O' rings (29 & 51) from thrust
washer (16).
8. Place a suitable container under the front of the
pivot and pull front yoke (17) from driveshaft (14).
9. Disconnect mounting hardware securing protective
guard (if fitted), from beneath the parking brake disc,
to the rear frame.
10. Release the parking brake by turning the hex-head
on the parking brake actuator fully anticlockwise.
WARNING
Tensioned spring on adjuster.
11. Remove mounting hardware securing parking
brake assembly to mounting bracket on frame, then
secure parking brake assembly clear of brake disc.
12. Identify the relationship of the driveline caps to
brake yoke (18). Remove capscrews, disconnect
driveline and secure clear of brake yoke.
13. Withdraw driveshaft assembly (14) from housing
by pulling rearwards on parking brake disc/brake
yoke assembly (18). If necessary, tap front end of
driveshaft (14) to ease removal, take care to avoid
damaging threads. Place driveshaft (14) assembly on
work bench for further disassembly.
14. Prise out and discard seal (15) from front of the
housing.
15. Lift out front bearing assembly cup (8) from front
of the housing.
16. If bearing replacement is required, use a suitable
puller to remove front and rear bearing assembly
cups (8) from the housing.
Note: If either bearing assembly cup or cone (8 or 9)
need replacing, they must be replaced as a set.
17. If retaining rings (31) need replacing, use a
suitable drift or puller to remove them from the housing.
18. Remove front nut (19) then temporarily install
front yoke (17) fully onto front of driveshaft (14) and
suitably restrain to resist rotation.
19. Remove mounting hardware securing parking
brake disc to brake yoke (18) and remove brake disc.
20. Remove rear nut (19), lockwasher (50), thrust
washer (16), and brake yoke (18) from driveshaft (14).
Identify front and rear ends of driveshaft (14).
21. Remove and discard 'O' rings (29 & 51) from
thrust washer (16).