TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 2 Download
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Manual References TM 9-2320-280-10 TM 9-2320-280-24P Equipment Condition Brake protection guards removed (para. 7-8.1) (M998A2 vehicle only). General Safety Instructions Make sure brake pads are installed with linings facing rotor. TM 9-2320-280-20-2 7-26 Change 3 7-12. SERVICE BRAKE CALIPER MAINTENANCE This task covers: a. Removal c. Installation b. Cleaning and Inspection INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) “C” clamp (Appendix B, Item 164) Special Tools Hex-head driver, 7-mm (Appendix B, Item 162) Crowfoot, 14-mm (Appendix B, Item 152) Materials/Parts Flat washer (Appendix G, Item 38) Grease (Appendix C, Item 22) Sealing compound (Appendix C, Item 45) NOTE • The following procedure applies to the front brake system on all vehicles and to the rear brake system on vehicles with serial numbers USBL Eff. 1 through 44824. • For replacement of rear dual service/parking brake pad on vehicles with serial numbers USBL Eff. 44825 and above, refer to para. 7-22. CAUTION Cover or plug all open lines and connections immediately after disconnection to prevent contamination. Remove all plugs prior to connection. 1. Disconnect brake line (1) from coupling (10). 2. Remove coupling (10) and flat washer (11) from caliper (9). Discard flat washer (11). 3. Using crowfoot, remove two capscrews (7), washers (6), yoke (5), and caliper (9) from adapter (4). NOTE Note positioning of brake pad surfaces for installation. 4. Remove two brake pads (2) from adapter (4). 5. Slide yoke (5) and locating pins (8) out from caliper (9). 1. Clean mating surfaces of caliper (9) and adapter (4) and lubricate with grease. 2. Clean cooling fins of rotor (3). 3. Inspect caliper (9) and caliper piston (12) for cracks, pitting, or damage. Replace caliper (9) if cracked, pitted, or damaged. 4. Inspect locating pin bearings and bushings (14) for tears or deterioration. Replace bearings and bushings (14) if torn or deteriorated. 5. Inspect dust boot (13) for tears or deterioration. Replace caliper (9) if dust boot (13) is torn or deteriorated. 6. Inspect yoke locating pins (8) for cracks or corrosion. Perform step 7 if pins (8) are cracked or corroded. 7. Using 7-mm hex-head driver, remove locating pins (8) from yoke (5). Discard locating pins (8). b. Cleaning and Inspection a. Removal