TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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20-4. STEERING ALIGNMENT (Cont'd) 1. Remove wheel (TM 9-2320-280-20). 2. Remove two locknuts (7), washers (2), capscrews (1), and washers (2) from upper control arm (8) and mounting brackets (3). Discard locknuts (7). 3. Loosen two capscrews (6) and four nuts (5) on two mounting brackets (3) and airlift bracket (4). NOTE Shims are available in 0.06-in. (1.52 mm) and 0.12-in. (3.05 mm) thicknesses. 4. Add or subtract shim(s) (9) as required to bring caster and/or camber withing specifications (table 20-1 or 20-2). Suspension alignment change in relation to shim selection is shown in table 20-3. b. Caster and Camber Adjustment NOTE Caster and camber adjustments are basically the same for all four wheels. This procedure covers the right front wheel. NOTE • Subtracting shims will affect caster/camber in the opposite direction as compared to adding shims. • For 0.06-in. (1.52-mm) shims, reduce the values in the table by half. • For larger changes, combinations of additions or subtractions will provide desired results. FRONT SUSPENSION LOCATION SHIM CASTER CAMBER REAR SUSPENSION LOCATION SHIM CASTER CAMBER Front shim only +0.12 in. (3.05 mm) +0.5° -0.1° Rear shim only +0.12 in. (3.05 mm) -0.5° +0.6° Front and rear shims +0.12 in. (3.05 mm) 0.0° +0.5° Front shim only +0.12 in. (3.05 mm) +0.6° +0.5° Rear shim only +0.12 in. (3.05 mm) -0.6° 0.0° Front and rear shims +0.12 in. (3.05 mm) 0.0° +0.5° 5. Tighten two capscrews (6) and four nuts (5) on two mounting brackets (3) to 90 lb-ft (122 N•m). 6. Install upper control arm (8) on mounting brackets (3) with two washers (2), capscrews (1), washers (2), and locknuts (7). Tighten locknuts (7) to 260 lb-ft (353 N•m). 7. Install wheel (TM 9-2320-280-20). 8. Go to task a, and repeat steps 1 through 3. Table 20-3. Suspension Alignment Change. TM 9-2320-280-34 20-22 Change 1