7-21. REAR DUAL SERVICE/PARKING BRAKE PAD MAINTENANCE (Cont'd)
7-50 Change 2
Apply a light coat of grease on adapter slides.
Ensure that grease and oil are not in contact with rotor and/or
shoe and lining friction surface. Failure to do so will result in
damage to equipment and poor performance.
Replace brake pads in axle sets only.
Replace brake pads if thickness is less than 3/16 in. (4.8 mm)
and operation in wet and muddy conditions is expected.
b. Cleaning and Inspection
Clean mating surfaces of caliper (1) and adapter (7) and lubricate adapter slides (7.1) with grease.
Inspect caliper (1) and caliper piston face (3) for cracks, pitting, or damage. Replace caliper assembly
if cracked, pitted, or damaged (para. 7-22).
Inspect dust boot (2) for tears or deterioration. Replace caliper assembly (1) if dust boot (2) is torn or
deteriorated (para. 7-22).
Inspect caliper cable bracket (4) for looseness, damage, and rotation. If loose, damaged, or
repositioned, replace caliper assembly (1).
Thoroughly clean and inspect rotor (6) for heat cracks, discoloration, pitting, or scoring. Replace
rotor (6) if cracked, pitted, or scored (para. 7-19).
Inspect brake pads (5) 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 (5) and pads on opposite caliper.