Disc Brake System: Testing and Inspection

1. Inspect the disc brake caliper and mounting for loose or damaged parts.

NOTE: For service, install a new disc brake caliper bracket bolt or reuse the old bolt with thread locking compound such as Ford Threadlock and Sealer EOAZ-19554-AA or equivalent meeting Ford specification WSK-M2G315-A5 (Type II). Tighten to 100-130 Nm (74-96 ft. lbs.).

2. Check the front brake hose and front disc brake caliper fitting for leaks or damage.

3. Check the disc brake caliper closely for wet areas that might indicate a leaking seal.

4. Measure front disc brake rotor thickness, parallelism and runout carefully.

5. Resurface, recondition or replace the front disc brake hub and rotor. A visual inspection will not determine the required service unless the damage is obvious.

6. Check for brake fluid contamination when inspecting the brake shoes and linings. This may indicate a leaking piston seal assembly. If a seal is leaking, the disc brake caliper must be disassembled and inspected.

7. Check for even wear from side to side. If the set of brake shoes and linings on one side of the vehicle is excessively worn, the caliper piston may be seized in the bore on the opposite side of the vehicle. If a seized caliper piston is suspected, the disc brake caliper must be disassembled and inspected.