TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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TM 9-2320-280-20-2 7-64 Change 3 7-26. REAR DUAL SERVICE/PARKING BRAKE ADJUSTMENT This task covers: Adjustment Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition Wheels chocked and parking brake released (TM 9-2320-280-10). Adjustment 1. Remove clip (1) and spread boot (2) to allow access to cotter pin (9). 2. Remove cotter pin (9), washer (8) and clevis pin (4) from clevis (5) and bellcrank (3). Discard cotter pin (9). 3. Repeatedly apply and adjust parking brake hand lever until bellcrank (3) linear travel is 0.75 in. (19 mm). 4. Release parking brake. Loosen nut (6) and adjust clevis (5) so holes in clevis (5) align to holes in bellcrank (3). Install clevis (5) on bellcrank (3) with clevis pin (4), washer (8), and cotter pin (9). 5. If necessary, remove excess slack in parking brake cables by turning the parking brake rod (7) clockwise or counterclockwise into the clevis (5). NOTE • The Kelsey-Hayes parking brake mechanism has an automatic adjusting feature and does not require periodic manual adjustment. When parking brake components or rear brake pads are replaced, the parking brake linkage must be initially positioned to ensure proper parking brake system operation. The only additional adjustment necessary is accomplished with the parking brake hand lever. Refer to TM 9-2320-280-10. • The following procedure applies to vehicles with serial numbers USBL Eff. 44825 and above. CAUTION Holes in parking brake clevis must aline to the holes in the adjusting bellcrank without force for proper parking brake adjustment. Failure to do this may result in damage to equipment and poor performance. CAUTION Do not overtighten brake rod. Overtightening brake rod may result in dragging brakes. INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Materials/Parts Cotter pin (Appendix G, Item 12) Personnel Required One mechanic One assistant