Brake Shoe: Testing and Inspection
INSPECTION AND REPAIR OF REAR BRAKE COMPONENTSInspect the disassembled parts for wear, rust or damage.
Measure brake shoe lining thickness
Standard thickness: 5.0 mm (0.197 in.)
Minimum thickness: 1.0 mm (0.039 in.)
If the shoe lining is less than minimum or shows signs of uneven wear, replace the brake shoes.
NOTE: If any of the brake shoes have to be replaced, replace all of the rear shoes in order to maintain even braking.
Fig. 3 Measuring Brake Drum Inside Diameter:
Measure brake drum inside diameter
SPECIFICATION -
If the drum is scored or worn, the brake drum may be lathed to the maximum inside diameter.
Inspect rear brake lining and drum for proper contact. If the contact between the brake lining and drum is improper, repair the lining with a brake shoe grinder, or replace the brake shoe assembly.
Measure clearance between 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 specification, replace the shim with one of the correct size.
Thickness in mm (in.)
---------------------------------
0.2 (0.008) 0.5 (0.020)
0.3 (0.012) 0.6 (0.024)
0.4 (0.016) 0.9 (0.035)
If necessary, replace shim
- Remove the parking brake lever, and install the correct size shim.
- Install the parking brake lever with a new C-washer.
- Remeasure the clearance.