Front

DISASSEMBLY

NOTE: Before disassembling the brake caliper, clean and inspect it. Disc Brake Caliper - Inspection

WARNING: Under no condition should high pressure air ever be used to remove a piston from a caliper bore. Personal injury could result from such practice.

1. Drain brake fluid from caliper.

CAUTION: Do not use excessive force when clamping caliper in vise. Excessive vise pressure will cause bore distortion.

2. Mount caliper in vise equipped with protective jaws.




3. C-clamp (2) a block of wood (1) over one piston.




4. Take another block of wood and pad it with one-inch thickness of shop towels (2). Place this piece in outboard shoe side of caliper (1) in front of other piston. This will cushion and protect caliper piston during removal.

WARNING: Do not place face or hands near caliper and piston if using compressed air to remove piston. Do not use high pressure.

WARNING: Never attempt to catch piston as it leaves bore. This could result in personal injury.

CAUTION: Do not blow piston out of bore with sustained air pressure. This could result in a cracked piston. Use only short spurts of air.

5. Apply short spurts of low pressure air with a rubber tipped blow gun through caliper brake hose port. Use only enough air pressure to ease piston out.
6. Remove C-clamp and block of wood from caliper and clamp it over dust boot of first piston removed. This will seal empty piston bore.
7. Move padded piece of wood in front of piston yet to be removed.
8. Remove second piston using same procedure with short spurts of low pressure air.
9. Remove C-clamp and block of wood from caliper.




10. Remove piston dust boots (2) with an appropriate pry tool.




CAUTION: Use an appropriate tool to remove piston seals to avoid scratching piston bore. Do not use a screwdriver or other metal tool to remove seals.

11. Remove piston seals (3) from caliper (1).
12. Remove caliper bleeder screw.
13. Clean piston bore and drilled passage ways with alcohol or a suitable solvent. Wipe it dry using only a lint-free cloth.
14. Inspect both piston and bore for scoring or pitting. Bores that show light scratches or corrosion can usually be cleared of light scratches or corrosion using crocus cloth.