C 3500 HD Truck 2WD V8-8.1L VIN G (2002)
Brake Caliper: Adjustments
Brake Caliper/Mounting Plate Wear Adjustment
Brake calipers have wear shims available to compensate for wear at the caliper to mounting bracket contact points. A rattling sound or clunking noise
may be heard from the brake area when the caliper and/or mounting bracket contact points become excessively worn. Use the following procedure to
measure and correct this condition.
Notice: Support the brake caliper with heavy mechanic's wire, or equivalent, whenever it is separated from it's mount and the hydraulic flexible brake
hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may
cause damage to the brake hose and in turn may cause a brake fluid leak.
1. Remove the caliper from the mounting bracket and support the caliper with heavy mechanic's wire or equivalent. DO NOT disconnect the
hydraulic brake hose from the caliper.
2. Clean surfaces (1-4) with a wire brush.
3. Smooth any deep nicks or gouges with a file.
4. Measure the caliper contact surface for wear by performing the following steps:
4.1. Lay a straight edge (1) across the caliper surfaces.
4.2. Measure the maximum depth of any wear on the surfaces using feeler gage (2).
4.3. Replace any calipers worn to a depth of 1.25 mm (0.050 inch) or more.
5. Install a new support key (1) without the spring (3).
6. Install the caliper lock mounting bolt (2).