TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
Page 698 of 953
NOTE The procedure for removing and installing all four coil springs are basically the same. This procedure covers the left front coil spring. NOTE For rear coil spring replacement on M1037 and M1042 models, it may be necessary to spread frame from body by positioning prybar between hinge mount bracket and rear bumper to gain access to shock absorber retaining pin nut. 1. Remove capscrew (13), two washers (14), and stabilizer bar link (15) from lower control arm (12). 2. Remove wheel (para. 8-3). NOTE Note direction of outer capscrews for installation. 3. Remove four locknuts (9), washers (8), capscrews (10), and washers (8) from lower ball joint (7), geared hub (6) and lower control arm (12). Discard locknuts (9). 4. Place jack under lower control arm (12) and raise lower control arm (12) slightly to relieve tension on shock pin (2). 5. Remove locknut (5), pin (2), washer (3), and shock absorber (11) from spring seat (4) and collapse shock absorber (11). Discard locknut (5). NOTE It may be necessary to loosen lower control arm capscrews to allow lower control arm to be lowered. 6. Pull geared hub (6) and ball joint (7) away from control arm (12), lower control arm (12), and remove coil spring (1) from lower control arm (12) and shock absorber (11). 1. Install coil spring (1) over shock absorber (11) and onto lower control arm (12) ensuring end of coil spring (1) fits in spring pocket of lower control arm (12). 2. Ensure coil spring (1) is aligned with spring seat (4) flange, and raise lower control arm (12). 3. Extend shock absorber (11) into spring seat (4) and install washer (3), pin (2), and locknut (5). Tighten locknut (5) to 300 lb-ft (407 N . m). b. Installation a. Removal 6-30. COIL SPRING 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) Locknut (Appendix G, Item 106) Sealing compound (Appendix C, Item 40) Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition • Hood raised and secured (TM 9-2320-280-20-10) (front springs only). M1037 and M1042 only: • Shelter removed (para. 11-120) (rear shock absorbers only). • Lower control arm supported (para. 6-29) (rear shock absorbers only). TM 9-2320-280-20-2 6-66 Change 3