Rear Brake Caliper Overhaul (With Dual Rear Wheel)
Rear Brake Caliper Overhaul (With Dual Rear Wheel)
Special Tools
* J-8092 - Driver Handle
* J-45515 - Piston Seal Installer
Disassembly Procedure
Warning: Refer to Brake Dust Warning (Brake Dust Warning).
Warning: Refer to Brake Fluid Irritant Warning (Brake Fluid Irritant Warning).
Note: Replace all the components included in the repair kits used to overhaul the brake caliper.
1. Remove the brake caliper. Refer to Rear Brake Caliper Replacement (With Single Rear Wheel) (Rear Brake Caliper Replacement (With Single Rear Wheel))Rear Brake Caliper Replacement (Dual Rear Wheel) (Rear Brake Caliper Replacement (Dual Rear Wheel)).
2. Place a wood block between the brake caliper pistons and the brake caliper housing bridge.
Warning
Do not place fingers in front of the caliper piston(s) in an attempt to catch or protect it when applying compressed air. The piston(s) can fly out with force and could result in serious bodily injury.
3. Place a clean shop towel between the brake caliper pistons and the block of wood.
4. Apply compressed air through the brake hose fitting inlet port and remove the brake caliper pistons (1).
5. Remove the brake caliper bleeder screw.
6. Using a blunt wooden or plastic tool, remove the brake caliper piston dust seals (1).
7. Using a blunt wooden or plastic tool, remove the brake caliper piston seals (1).
8. Inspect the brake caliper bores for corrosion, grooves, and scoring.
* Inspect the caliper piston bores
* Inspect the caliper piston seal grooves
If excessive corrosion, grooving, or scoring is found, replace the brake caliper.
9. Clean the brake caliper housing and any parts to be reused with denatured alcohol.
10. Dry all components with dry, filtered, non-lubricated compressed air.
Assembly Procedure
1. Apply a light coating of GM approved brake fluid from a clean, sealed brake fluid container to the brake caliper components:
* Brake caliper piston bores
* Brake caliper pistons
* Brake caliper piston seals
2. Install the brake caliper piston seals (1) to the brake caliper piston bores.
Ensure the brake caliper piston seals are fully seated in the groove of the caliper piston bores and are not distorted.
3. Using the J-45515 - Piston Seal Installer with the J-8092 - Driver Handle , install the brake caliper piston dust seals (1).
4. Install the brake caliper pistons (1) into the brake caliper housing.
Use firm, downward hand pressure to press the brake caliper pistons squarely into the caliper bores.
5. Seat the edge of the brake caliper dust seals in the groove in the brake caliper piston.
6. If necessary, carefully lift the edge of the brake caliper dust seals at the brake caliper piston to release any trapped air.
7. Install the brake caliper. Refer to Rear Brake Caliper Replacement (With Single Rear Wheel) (Rear Brake Caliper Replacement (With Single Rear Wheel))Rear Brake Caliper Replacement (Dual Rear Wheel) (Rear Brake Caliper Replacement (Dual Rear Wheel)).