TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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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