Disc Brake System: Testing and Inspection

NOTE: This procedure applies to components of front and rear disc brakes (if equipped).

1. Raise vehicle on hoist.
2. Remove wheel and tire assemblies from vehicle.





3. Inspect brake shoes and linings for wear. If the lining is worn to within 1.0 mm (0.039 inch) of the rivets or backing plate, replace all four brake shoe and lining assemblies (complete axle set) on front or rear wheels as required.
4. Visually check disc brake caliper. If disc brake caliper housing is leaking, it should be replaced. If a seal is leaking, disc brake caliper must be disassembled and new seals installed. If a caliper piston is seized in bore, a new disc brake caliper is required. Care should be taken not to scratch the caliper piston.
5. Inspect disc brake caliper locating pin to make sure an adequate amount of Disc Brake Caliper Slide Grease D7AZ-19590-A or equivalent meeting Ford specification ESA-M1C172-A exists.
6. Install wheel and tire assembly on vehicle. Tighten lug nuts to 115 - 142 Nm (85 - 104 ft. lbs.) using Rotunda Accutorq Lug Nut Socket 164-R0303 or equivalent, on a 1/2 inch air impact wrench or use a torque wrench.

CAUTION: Failure to tighten lug nuts in a star pattern may result in high rotor runout, which will speed up development of brake roughness, shudder and vibration.

7. Lower vehicle.