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

Page 696 of 953

6-29. LOWER CONTROL ARM REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Four locknuts (Appendix G, Item 128) (Basic/A1 Series) Four locknuts (Appendix G, Item 105) (A2 Series) Two locknuts (Appendix G, Item 89) Sealing compound (Appendix C, Item 40) Personnel Required One mechanic One assistant Manual References TM 9-2320-280-24P Equipment Condition • Wheel removed (para. 8-3). • Shock absorber removed (para. 6-31). General Safety Instructions Lower control arm must be supported during removal and installation. TM 9-2320-280-20-2 6-64 Change 3 NOTE The procedures for removing and installing the front and rear lower control arms are basically the same. This procedure covers the left front lower control arm. WARNING Lower control arm must be supported during removal and installation. Failure to support lower control arm may cause injury to personnel or damage to equipment. NOTE Note direction of outer capscrews for installation. 1. Remove four locknuts (7), washers (6), capscrews (9), and washers (6) from lower ball joint (5), geared hub (4) and lower control arm (8). Discard locknuts (7). 2. Remove capscrew (14), two washers (12), and bar link (13) from lower control arm (8). 3. Raise and support lower control arm (8) and pull geared hub (4) away. 4. Lower the lower control arm (8) and remove coil spring (10). 5. Remove two locknuts (3), washers (2), capscrews (1), washers (2), and lower control arm (8) from brackets (11). Discard locknuts (3). NOTE On lower control arms, capscrew heads are toward front of vehicle. 1. Install lower control arm (8) on brackets (11) with two washers (2), capscrews (1), washers (2), and locknuts (3). 2. Install coil spring (10) on lower control arm (8) ensuring end of coil spring (10) fits in spring pocket of lower control arm (8). WARNING Lower control arm must be supported during removal and installation. Failure to support lower control arm may cause injury to personnel or damage to equipment. 3. Raise lower control arm (8) to align with geared hub (4) and ball joint (5) ensuring lower ball joint (5) is placed below lower control arm (8). b. Installation a. Removal