TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0170 00 0170 00-2 HYDRAULIC MASTER CYLINDER MAINTENANCE (Contd) WARNING Accidental or intentional introduction of liquid contaminants into the environment is a violation of state, federal, and military regulations. Refer to Army POL (WP 0001 00) for information concerning storage, use, and disposal of these liquids. Failure to do so may result in damage to environment and health of personnel. CAUTION When disconnecting hydraulic lines and hoses, plug all openings to prevent dirt from entering and causing internal parts damage. Remove caps and plugs prior to installation. INTERNAL LEAKAGE TEST 1. Remove screw-assembled lockwasher (6) from brace (2) and open access door (1). Discard screw assembled lockwasher (6). 2. Disconnect line (3) from adapter (5). 3. Remove two screws (8) and shield (9) from air-hydraulic cylinder (7). NOTE Use a drain pan to capture any draining brake fluid. Dispose of fluids in accordance with local policy and ordinances. Ensure all spills are cleaned up. 4. Remove line (10) from adapter (11) and adapter (12). NOTE Have plug ready to replace adapter before removing adapter. 5. Remove adapter (11) from master cylinder (4) and quickly install plug (13). 6. Make sure master cylinder reservoir (4) is filled with brake fluid 0.5 in. (12.7 mm) from top. Refer to WP 0020 00. NOTE Assistant will help with steps 7 and 8. 7. Measuring distance alongside of brake pedal (14), step down slowly but firmly on brake pedal (14). Maintain steady firm pressure for 30 seconds. 8. Brake pedal (14) should not move more than 0.125–0.25 in. (3.18–6.35 mm). 9. If brake pedal (14) moves more than 0.125–0.25 in. (3.18–6.35 mm) in 30 seconds, there is an internal leak. Replace master cylinder (4). NOTE Use a drain pan to capture any draining brake fluid. Dispose of fluids in accordance with local policy and ordinances. Ensure all spills are cleaned up. 10. Remove plug (13) and install adapter (11) in master cylinder (4). 11. Install line (10) on adapter (11) and adapter (12). 12. Install shield (9) on air-hydraulic cylinder (7) with two screws (8). 13. Fill master cylinder reservoir (4) 0.5 in. (12.7 mm) from top (WP 0020 00). 14. Connect line (3) on adapter (5). 15. Close access door (1) and secure to brace (2) with new screw-assembled lockwasher (6).