TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 1068 of 1176
TM 9-2320-361-24-1 0170 00 0170 00-4 HYDRAULIC MASTER CYLINDER MAINTENANCE (Contd) CAUTION When disconnecting hydraulic lines and hoses, plug all openings to prevent dirt from entering and causing internal parts damage. Remove plugs prior to installation. REMOVAL 1. Remove screw-assembled lockwasher (6) from brace (2) and open access door (1). 2. Disconnect line (4) from adapter (5). 3. Remove two screws (8) and shield (9) from air-hydraulic cylinder (7). 4. Remove two screws (10) from bracket (20) and master cylinder (3). Push bracket (20) away from master cylinder (3). 5. Remove spring (14) from clevis pin (11) and bracket (13). 6. Remove cotter pin (15) from clevis pin (11). Discard cotter pin (15). NOTE Brake pedal must be supported in full extended position for ease when installing master cylinder. 7. Scribe or measure position of jamnut (17). 8. Loosen jamnut (17) and remove clevis pin (11) and yoke (16) from brake pedal lever (12). 9. Remove pushrod (18) and boot (19) from master cylinder (3). NOTE Have drainage container ready to catch brake fluid. 10. Remove line (21) from adapters (22) and (23). 11. Remove four bolt-assembled lockwashers (24) and master cylinder (3) from bracket (26). Discard bolt-assembled lockwashers (24). 12. Remove adapter (22) and adapter (5) from master cylinder (3). INSTALLATION NOTE • All male pipe threads must be wrapped with antiseize tape before installation. • Remove all plugs that were installed during the removal procedure and from the left or right side of the master cylinder, so that the master cylinder will fit through the access hole in the frame cross member. 1. Install adapter (22) and adapter (5) on master cylinder (3). 2. Install master cylinder (3) on bracket (25) with four new lockwashers (25) and bolt assembled lockwashers (24). 3. Install line (21) on adapters (22) and (23). 4. Install boot (19) and pushrod (18) on master cylinder (3). 5. Install yoke (16) on pushrod (18) to measured distance or scribed mark, ensure yoke (16) forked end aligns with brake pedal lever (12). 6. Tighten jamnut (17) on pushrod (18). 7. Align brake pedal lever (12) with yoke (16) holes and install with clevis pin (11) and new cotter pin (15). 8. Install spring (14) on clevis pin (11) and bracket (13).