Drum Brake System: Service and Repair

REMOVAL





1. Inspect shoe lining thickness.
Remove the inspection hole plug, and check the shoe lining thickness through the hole.
If less than minimum, replace the shoes.
Minimum thickness: 1.0 mm (0.039 inch)

2. Remove rear wheel.




3. Remove brake drum.

HINT: If the brake drum cannot be removed easily, do the following steps.
a. Insert a screwdriver through the hole in the brake drum, and hold the automatic adjusting lever away from the adjuster.
b. Using another screwdriver, reduce the brake shoe adjuster by turning the adjuster.

4. Remove front shoe.



a. Using pliers, remove the return spring from the automatic adjusting lever.
b. Remove the return spring from the rear shoe.
c. Remove the automatic adjusting lever.



d. Using Special Service Tool (SST) 09718-00010 or equivalent, remove the shoe hold-down spring, cup and pin.



e. Using SST 09703-30010, disconnect the anchor spring from the front shoe and remove the front shoe.
f. Remove the adjuster.
g. Remove the anchor spring from the rear shoe.

5. Remove rear shoe.
a. Using SST 09718-00010, remove the shoe hold-down spring, cup arm pin.
b. Using pliers, disconnect the parking brake cable from the parking brake lever and remove the rear shoe.
c. Using pliers, disconnect the parking brake cable from the parking brake lever and remove the rear shoe.

6. Remove parking brake lever.
a. Remove the C-washer and shim.
b. Remove the parking brake lever.




7. Remove wheel cylinder.
a. Using SST 09023-00100, disconnect the brake line. Use a container to catch the brake fluid.
Torque: 15 Nm (11 ft. lbs.)
b. Remove the 2 bolts and the wheel cylinder.
Torque: 15 Nm (11 ft. lbs.)

8. Disassemble wheel cylinder.
Remove these parts from the wheel cylinder.
- 2 boots.
- 2 pistons.
- 2 piston cups.
- Spring.

INSTALLATION
Installation is in the reverse order of removal.




NOTICE: Apply lithium soap base glycol grease and high temperature grease to the parts indicated by the arrows.




1. Check clearance between brake shoes and drum.
a. Remove the brake drum.
b. Measure the brake drum inside diameter and diameter of the brake shoes. Check that the difference between the diameters is the correct shoe clearance.
Shoe clearance: 0.5 mm (0.020 inch)
If incorrect, check the parking brake system.

2. Fill brake reservoir with brake fluid.
3. Bleed brake system.
4. Check for leaks.