Disc Brake Caliper - Inspection

INSPECTION

CAUTION: If the caliper piston is replaced, install the same type of piston in the caliper. Never interchange phenolic resin and steel caliper pistons. The pistons, seals, seal grooves, caliper bore and piston tolerances are different.

Remove deposits on the piston using a soft brass wire brush or a rough shop towel. Do not clean piston with a polishing or emery cloth because this will damage the chrome-plated surface. Replace the piston if the chrome-plated surface is damaged.

Clean anodized aluminum versions (piston and housing bore) with a soft rag only.

If the piston is jammed or if the cylinder bores are scored or rusted, replace the complete fixed brake caliper and with the floating brake caliper, replace the cylinder housing. Remove small, light rust spots in the cylinder bore with a polishing cloth. Remove heavy rust spots in front of the groove for the piston seal using fine-grained emery paper (grain size 380 to 500).