Caliper, Disc Brake, Front: Disassembly
Before disassembling the brake caliper, remove it from the vehicle. Refer to CALIPER, DISC BRAKE, REAR, REMOVAL .
Before disassembling the brake caliper, clean and inspect it. Refer to CALIPER, DISC BRAKE, REAR, INSPECTION and CALIPER, DISC BRAKE, REAR, CLEANING .
Under no condition should high pressure air ever be used to remove a piston from a caliper bore. Personal injury could result from such a practice.
Do not use excessive force when clamping caliper in vise. Excessive vise pressure will cause bore distortion.
- Mount the caliper in a vise equipped with protective jaws.WARNING:
Do not place face or hands near caliper and piston if using compressed air pressure to remove piston. Do not use high pressure.
- Place a wooden block in the caliper.
- If necessary, apply low pressure compressed air to the caliper fluid inlet in short spurts to force the piston out.
- Remove the pistons (2) from the caliper.
- Remove the dust boot (1) from the piston and discard it.CAUTION:
Do not use a screwdriver or other metal tool for seal removal. Using such tools can scratch the bore or leave burrs on the seal groove edges.
- Using a soft tool such as a plastic trim stick, work the piston seal (3) out of its groove in caliper piston bore (5). Discard the used seal.
- Clean the piston bore and drilled passage ways with alcohol or a suitable solvent. Wipe it dry using only a lint-free cloth.
- Inspect both the piston and bore for scoring or pitting. Bores that show light scratches or corrosion can usually be cleared of the light scratches or corrosion using crocus cloth.