Rear Cleaning and Inspection

The operation and diagnostic procedures for a rear disc brake are very similar to those for a front disc brake. When inspecting rear disc brakes:

1. Check for leakage at the hose fittings.
2. Inspect the brake hose for:
^ Cuts
^ Abrasions
^ Cracking
^ Leakage

3. Inspect the brake shoes and linings for:
^ General wear
^ Gouges
^ Scoring
^ Cracking
^ Contamination

4. If there is uneven brake shoes and linings wear at the same rear disc brake caliper, check that the rear disc brake caliper moves easily back and forth on the brake caliper bolts. Check the condition of the brake caliper bolts. Be sure they are properly lubricated.

5. Check for a frozen piston. Jack up the rear of the car and apply the brakes with a force of 588.4 N (132.2 lbs) and then release the brakes. Each wheel must then turn easily by hand. If a wheel does not turn easily, the piston is probably frozen.

^ Before rebuilding the rear disc brake caliper be sure the problem is not simply due to the rear disc brake caliper not moving freely on the brake caliper bolts.

Rear Disc Brake Parallelism Check:

6. Check for disc brake rotor parallelism or thickness variation. The minimum thickness is 8 mm (0.315 inch). Disc brake rotor thickness must not vary more than 0.025mm (0.001 inch).

7. Use Dial Indicator with Bracketry TOOL-4201-C or equivalent, to check for rotor runout. Runout must not be greater than 0.1 mm (0.004 inch).