TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 690 of 951
6-26. UPPER BALL JOINT REPLACEMENT
This task covers:
a. Inspection
c. Installation
b. Removal
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Pickle fork (Appendix B, Item 129)
Special Tools
Socket adapter (Appendix B, Item 146)
Crowfoot 15/16 in. (Appendix B, Item 151)
Materials/Parts
Cotter pin (Appendix G, Item 14)
Four locknuts (Appendix G, Item 79)
(Basic/A1 Series)
Four locknuts (Appendix G, Item 104)
(A2 Series)
Personnel Required
One mechanic
One assistant
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
Equipment Condition
Wheel removed (para. 8-3)
TM 9-2320-280-20-2
6-58
Change 3
1.
Chock rear wheels.
2.
Raise and support front wheels 2 in. (5.1 cm) off ground.
3.
Grasp top of tire and attempt to move tire in and out.
4.
Measure any movement at top outer edge of tire. Replace the upper ball joint (4) if tire movement
is 3/8 in. (10 mm) or more.
1.
Raise and support lower control arm.
2.
Remove cotter pin (8) and slotted nut (7) from upper ball joint (4) and geared hub (6). Discard
cotter pin (8).
3.
Remove four locknuts (3), washers (2), capscrews (9), washers (2), and upper ball joint (4) from boot
retainer (5), ball joint retainer (10), and upper control arm (1). Discard locknuts (3).
4.
Using puller, remove ball joint (4) from geared hub (6).
1.
Install ball joint (4) to upper control arm (1), ensuring upper ball joint (4) is placed above upper
control arm (1), and boot retainer (5) and ball joint retainer (10) are placed below upper control
arm (1).
2.
Secure upper ball joint (4) to upper control arm (1) with four washers (2), capscrews (9),
washers (2), and locknuts (3). Tighten locknuts (3) to 37 lb-ft (50 N
•
m).
CAUTION
Do not loosen slotted nut to install cotter pin. Doing this may
result in damage to equipment.
3.
Install ball joint (4) to geared hub (6) with slotted nut (7). Using crowfoot and adapter, tighten
slotted nut (7) to 73 lb-ft (99 N
•
m). Install cotter pin (8) in slotted nut (7).
c. Installation
b. Removal
a. Inspection
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