INSPECTING DISC BRAKES.- Areas to check when inspecting disc brakes are the pads, the disc, and the caliper. You should check the thickness of the brake pad linings. Pads should be replaced when the thinnest (most worn) part of the lining is approximately 1/ 8 inch thick.

Check the caliper for fluid leakage at the piston seal and missing or damaged clips/ springs. The disc should be checked for damage, such as heat cracks, heat checks (overheating causes small hardened and cracked areas), and scoring. Wheel bearings should be checked and adjusted if necessary. To check for rattles, strike the caliper with a soft-faced rubber mallet. To repair any of these problems, consult the manufacturer's service manual.

INSPECTING DRUM BRAKES.- Areas to check when inspecting drum brakes are the brake shoes, the brake drums, the wheel cylinders, and other related parts. Once the wheel is removed, you must remove the brake drum that will expose all parts requiring inspection.

The brake shoe linings must NOT be worn thinner than 1/ 16 inch. They also should NOT be glazed or coated with grease, brake fluid, or differential fluid. Any of these conditions require lining replacement.

Check the brake drum for cracks, heat cracks. heat checks, hard spots, scoring, or worn beyond specifications. Damaged drums may be machined (turned) as long as they still meet the manufacturer's specifications. Badly damaged or worn drums must be replaced.

To check the wheel cylinder for leakage, pull back the cylinder boots. If the boot is full of fluid, the wheel cylinder should be rebuilt or replaced. Also, check the return springs and the automatic adjusting mechanism.