Drum Brake System: Service and Repair
Removal1. Raise and suitably support rear of vehicle.
2. Remove rear wheels and release parking brake.
3. Using an impact driver, remove two mounting screws holding the drum and remove the brake drum.
Notice: If brake drum is difficult to remove, thread two 8 mm jacking bolts into two threaded holes provided on drum face and tighten evenly.
4. Remove top return spring.
5. Remove front and rear shoe spring clip and hold down pins.
6. Remove anti-rattle spring and adjuster spring.
7. Note position of operating lever while holding front shoe, then remove bottom return spring.
8. Disconnect parking brake cable from rear shoe by removing clip and washer.
9. Remove front and rear brake shoes.
10. Clean parts with a brake vacuum or solvent and inspect all parts for wear or damage. Replace as necessary.
Inspection
1. Raise and suitably support rear of vehicle.
2. Remove rear wheels and release parking brake.
3. Using an impact driver, remove two mounting screws holding brake drum. Remove drum.
Notice: If brake drum is difficult to remove, thread two 8 mm jacking bolts into two threaded holes provided on drum face and tighten evenly.
4. Inspect wheel cylinders for brake fluid leaks.
5. Measure lining thickness. Replace both linings if either is less than specification.
Minimum lining thickness: 0.04 inch (1.0 mm)
6. Inspect lining for cracks, uneven wear or oil contamination. Repair or replace as necessary.
7. Measure drum inside diameter. Replace drum if diameter is greater than specification.
Maximum diameter: 7.87 inch (200 mm)
8. Inspect drums for cracks, grooves or uneven wear. Resurface or replace as necessary.
9. Verify new or repaired drum-to-shoe contact.
Replacement
1. Using white brake grease, sparingly lubricate all brake shoe contact points:
a Shoe-to-wheel cylinder contact points
b Anchor sliding points
c Backing plate-to-shoe contact points
2. Rest operating lever behind and on hub in approximate position as noted above in Removal.
3. Place rear brake shoe in position and connect parking brake cable to rear shoe with washer and clip.
4. Position front brake shoe in place and connect front and rear shoes together with bottom return spring.
5. Hold brake shoe assembly on backing plate, with operating lever between front and rear shoes, and insert hold-down pins through rear of backing plate and into each shoe.
6. Secure front and rear hold-down pins with spring clips.
7. Make sure operating lever is in place and install top return spring.
8. Install anti-rattle spring and adjuster spring.
9. Mount drum and install two mounting retaining screws.
10. Adjust brakes as required.
11. Install rear wheels, and tighten four nuts.
Tightening torque: 65 - 87 ft. lbs. (88 - 118 Nm, 9 - 12 kg-m)