Parking Brake Shoe: Testing and Inspection

1. MEASURE BRAKE SHOE LINING THICKNESS
Using a scale, measure the thickness of the shoe lining.
Standard thickness: 2.5 mm (0.098 in.)
Minimum thickness: 1.0 mm (0.039 in.)
If the lining thickness is at the minimum thickness or less, or if there is extremely uneven wear, replace the brake shoe.






3. MEASURE BRAKE DISC INSIDE DIAMETER
Using a vernier caliper, measure the inside diameter of the rotor disc.

Standard inside diameter: 190 mm (7.48 in.)
Maximum inside diameter: 191 mm (7.52 in.)
Replace the rotor disc if the inside diameter is at the maximum value or more. Replace the rotor disc or grind it with a lathe if the rotor disc is scored or is worn unevenly.






4. INSPECT PARKING BRAKE LINING AND DISC FOR PROPER CONTACT
Apply chalk to the inside surface of the rotor, then grind down the brake shoe lining to fit. If the contact between the rotor disc and the brake shoe lining is improper, repair it using a brake shoe grinder or replace the brake shoe assembly.











5. MEASURE CLEARANCE BETWEEN PARKING BRAKE SHOE AND LEVER
Using a feeler gauge, measure the clearance.
Standard clearance: Less than 0.35 mm (0.0138 in.) If the clearance is not within the specification, replace the shim with one of the correct size.
6. IF NECESSARY, REPLACE SHIM
(a) Remove the parking brake lever, and install the correct size shim.
(b) Install the parking brake shoe lever with a new C-washer.
(c) Remeasure the clearence.