TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-i 7-6. HYDRO-BOOSTER REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 11 Maintenance and repair shop equipment: automotive (Appendix B, Item 2) MateriaWF’arts Cotter pin (Appendix G, Item 36) Spring washer (Appendix G, Item 452) Four lockwashers (Appendix G, Item 217) Manual References TM 9-2320-387-24P EquipmentCondition Master cylinder removed (para. 7-51. Maintenance Level Unit Personnel Required One mechanic One assistant 1 a. Removal 1 CAUTION Cover or plug all open lines and connections immediately after disconnection to prevent contamination. Remove all plugs prior to connection. NOTE Have drainage container ready to catch brake fluid. 1. Mark and disconnect two high-pressure lines (4) and return line (5) from hydro-booster (6). 2. Remove cotter pin (3) and washer (21,and disconnect pushrod (7) from brake pedal bellcrank (13). Remove spring washer (11from brake pedal bellcrank (131. Discard cotter pin (3) and spring washer (1). 3. Remove four nuts (121,lockwashers (111,washers (lo), hydra-booster (61, and gasket (8) from cowl (9). Discard lockwashers (11). b. Installation 1. Install gasket (8) and hydra-booster (6) on cowl (9) with four washers (lo), lockwashers (111, and nuts (12). Do not tighten nuts (12). 2. Install spring washer (1) on brake pedal bellcrank (13). Connect hydra-booster pushrod (7) to brake pedal bellcrank (131 with washer (2) and cotter pin (3). 3. Tighten nuts (121 to 21 lb-R (29 N-m). 4. Connect two high-pressure lines (41 and return line (5) to hydro-booster (6). 7-16