Brake Drum: Service and Repair

Drum - Rear

Service Repair No - 70.12.03

Remove
1. Raise rear of vehicle.

WARNING: Do not work on or under a vehicle supported only by a jack. Always support the vehicle on safety stands.

2. Remove road wheel.
3. Release handbrake.





4. Remove 2 screws securing brake drum and remove brake drum.

NOTE: If brake drum cannot be removed, release brake shoe adjustment as follows:





5. Remove rubber grommet from rear of backplate.
6. Using 2 flat bladed screwdrivers, release ratchet and turn the adjuster to increase the shoe to drum clearance.





7. Remove brake drum.

WARNING: Do not use compressed air to clean brake components. Dust from friction materials can be harmful if inhaled.

Refit
1. Renew brake drum if scored, grooved or cracked.
2. Check wheel cylinder pistons for freedom of movement.
3. Clean backplate and brake disc with brake cleaning fluid.

WARNING: Do not use petroleum based fluid as damage will occur to rubber components





4. Measure inside diameter of drum at 2 points. Drum internal diameter: New = 254 mm. Service limit: = 255.49 mm. Drum ovality limit: = 0.012 mm. Renew drum if outside limits.
5. Examine wheel cylinder dust seals for signs of brake fluid leakage, a certain amount of dampness is usual. However, if excessive fluid is apparent, lift dust seals and check for leakage. Renew wheel cylinders and brake shoes if linings are contaminated.
6. Apply molykote 111 grease to brake shoe and spring contact points.

WARNING: Ensure grease does not contact brake shoe linings or wheel cylinder dust covers.

7. Fit brake drum and tighten screws.
8. If necessary, fit backplate grommet.
9. Apply brake pedal a min. of 30 times to ensure full adjustment of rear brake shoes after refitting.
10. Check handbrake operation, adjust if necessary.
11. Fit road wheel(s) and tighten nuts.
12. Remove stands and lower vehicle.