Disc Brake System: Service and Repair

1. Grease or any other foreign material must be kept off lining surfaces and braking surfaces of the front disc brake hub and rotor, and brake drum, and external surfaces of hub during service operation. In handling the front disc brake hub and rotor and brake drum, and disc brake caliper assemblies, avoid deformation of the front disc brake hub and rotor, and brake drum, and nicking or scratching of brake linings.

2. If a front disc brake caliper piston is removed for any reason, the piston seal must be replaced. Exercise care not to damage the front disc brake caliper piston by protecting it from contact with any metal or sharp objects.

CAUTION: Do not pry on the front disc brake caliper piston with a screwdriver or other tools, as this will cause chipping, nicks and gouges.

3. During removal and installation of a wheel assembly, exercise care not to interfere with and damage the front disc brake rotor shield and the brake backing plate and bleeder screw fitting.

4. Before servicing any front end components, ensure the vehicle is centered on the hoist to avoid bending or damaging the front disc brake rotor shield and the brake backing plate on full right or left wheel turns.

5. Do not attempt to clean or restore oil or grease-soaked brake shoes and linings. When contaminated brake shoes and linings are found, they must be replaced in complete axle sets and the disc brake rotor and brake drum braking surfaces wiped clean.

6. Disc brake calipers must be installed with the bleeder screws in upward position for proper bleeding of air from the brake system.