TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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TM 9-2320-280-20-2 8-32 Change 2 8-10. FRONT WHEEL TOE-IN ALIGNMENT INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) General mechanic’s tool kit: automotive, common No. 2 (Appendix B, Item 4) Materials/Par ts Chalk (Appendix C, Item 15) Personnel Required One mechanic One assistant Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition •Tires inflated to proper pressure (TM 9-2320-280-10). •Vehicle on level ground. This task covers: a. Preliminary Inspection c. Toe-in Adjustment b. Toe-in Check NOTE • It is not necessary to perform front wheel toe-in alignment prior to the scheduled semiannual or 3,000 mile (4,827 km) maintenance interval unless abnormal vehicle handling or control is reported, or it is directed by another maintenance task. • Front wheel alignment adjustments other than toe-in are performed by DS maintenance. • Make sure models M1037 and M1042 have S250 shelter installed before performing front wheel toe-in alignment. 1. Check all tires (6) for uniform tread wear. 2. Raise vehicle and place support under lower control arms (9). 3. Check geared hubs (4) for output spindle end play by grasping edges of tires (6) and attempting to move tires (6) up and down. Adjust spindle bearings if any spindle movement is apparent (para. 6-14). 4. Check for looseness of upper ball joints (3) by grasping top of tires (6), and attempting to move tires (6) in and out. Replace upper ball joints (3) if tire (6) movement at top outer edge of tires (6) is 3/8 in. (9 mm) or more (para. 6-26). 5. Check for looseness of lower ball joints (7) by grasping bottom of tires (6), and attempting to move tires (6) in and out. Replace lower ball joints (7) if tire (6) movement at bottom outer edge of tires (6) is 1/2 in. (13 mm) or more (para. 6-27). 6. Lower vehicle. 7. Check for looseness of tie rod ends (5) by attempting to move tie rods (8) vertically and horizontally. Replace tie rod end(s) (5) if any movement is apparent (para. 8-16). 8. Check for damaged control arm bushings (1). Replace upper control arms (2) (para. 6-28) or lower control arms (9) if bushings (1) are damaged (para. 6-29). a. Preliminary Inspection