Master Cylinder, Brakes

1. Wash brake master cylinder body, especially bore, along with primary and secondary piston assemblies in clean brake fluid. Denatured or isopropyl alcohol can also be used.

2. CAUTION: Blistering or swelling indicates contamination of brake fluid by petroleum-based solvent or oil. In that case, all rubber components in brake hydraulic system must be inspected and replaced and entire system must be flushed with clean brake fluid to prevent recontamination.

The components that must be replaced are:
^ front brake caliper seals.
^ rubber front brake hoses.
^ rear wheel cylinder seals.
^ rubber rear brake hoses.
^ brake pressure control valves.
^ primary and secondary piston assemblies.
^ reservoir grommets.
^ cap assemblies.

3. CAUTION: Honing of the bore on aluminum master cylinders is not permitted because the anodic coating and hardness could be removed.

Inspect seals on primary and secondary piston assemblies for cuts, nicks, scratches or signs of wear and for presence of any blistering or swelling.

4. NOTE: The aluminum body of the brake master cylinder is anodized - Some signs of bore wear, as evidenced by lighter areas of the anodized surface, are normal and not detrimental.

Inspect master cylinder bore for pitting, corrosion or heavy wear. Heavy wear is characterized by scoring or galling of metal.