TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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7-3. SERVICE BRAKE PAD MAINTENANCE (Cont’d) TM 9-2320-387-24-1 7-8 Change 1 c. Installation WARNING Ensure brake pads are installed with linings facing rotor. Failure to do this may cause injury to personnel or damage to equipment. NOTE Perform steps 1 and 2 for right side. Perform steps 3, 4, and 5 for left side. 1. Position two brake pads (4) on adapter (6). NOTE When installing yoke and caliper, use a C-clamp and a block of wood to bottom out piston in caliper. If piston will not bottom out, replace caliper (para. 7-4). 2. Apply sealing compound to tapped holes of adapter (6). Using crowfoot, install yoke (7) and caliper (1) on adapter (6) with clamp (8.1), two washers (8), and capscrews (9). Tighten capscrews (9) to 30-40 lb-ft (41-54 N • m). 3. Install two brake pads (4) on adapter (6). 4. Remove two capscrews (12) from rotor (5). NOTE • Ensure all six capscrews holes in the rotor align with holes in output flange. • New capscrews come with preapplied thread-locking compound, however, still apply sealing compound to threads of new capscrews. If old capscrews are to be used, mating threads must be cleaned and sealing compound applied to threads of capscrews. • Two-piece lockwashers must be installed in sets of two with serrated sawtooth threads facing each other. 5. Apply sealing compound to six capscrews (12), and install halfshaft (10) on rotor (5) with six two- piece lockwashers (11) and capscrews (12). Tighten capscrews (12) to 58 lb-ft (79 N•m). b. Cleaning and Inspection 1. Clean mating surfaces of caliper (1) and adapter (6) and lubricate with grease. 2. Inspect caliper (1) and caliper piston (2) for cracks, pitting, or damage. Replace caliper (1) if cracked, pitted, or damaged (para. 7-4). 3. Inspect dust boot (3) for tears or deterioration. Replace caliper (1) if dust boot (3) is torn or deteriorated (para. 7-4). 4. Inspect rotor (5) for heat cracks, discoloration, pitting, scoring, or wear. Replace rotor (5) if thickness of rotor (5) is less then 13/16 in. (20.7 mm), cracked, pitted, or scored (para. 7-12). NOTE • To ensure proper brake function, replace brake pads in pairs on both sides of differential. • Replace brake pads if thickness is less than 3/16 in. (4.8 mm) and operation in wet and muddy conditions is expected. 5. Inspect brake pads (4) for glazing, oil saturation, or wear. If glazed, oil saturated, or if brake pad thickness is less than 1/8 in. (3.2 mm), replace both pads (4) and pads on opposite caliper. 6. Clean output flange threaded holes (5.1) behind rotor (5) with a 10-mm tap to remove old sealing compound.