Rear wheel cylinder (page 2 of 2)

10. Disconnect pipe union from wheel cylinder.

CAUTION: Plug the connections.

11. Remove 2 bolts securing wheel cylinder to backplate.

12. Remove wheel cylinder.
13. Remove and discard sealing ring.
14. Clean backplate and drum with brake cleaning fluid. Use a wire brush to remove any corrosion.

WARNING: Do not use an air line to blow dust from brake assembly. Do not use petroleum based fluid as damage will occur to rubber components.

Inspect

1. Examine wheel cylinder dust seals for signs of brake fluid leakage, a certain amount of dampness is usual. However, if free fluid is apparent, lift dust seal and check for excessive leakage.
2. Renew wheel cylinder if brake linings have become contaminated.
3. Check wheel cylinder pistons for freedom of movement.

Refit

1. Fit NEW sealing ring to wheel cylinder.
2. Fit wheel cylinder to backplate and tighten bolts to 8 Nm.
3. Connect brake pipe to wheel cylinder and tighten union to 19 Nm.
4. Smear shoe contact points with Molykote 111 grease, ensure grease does not contact linings or dust covers.
5. Manoeuvre shoe assembly into position between hub and wheel cylinder and connect hand brake cable to brake shoe lever.
6. Fit lower return spring to trailing shoe and connect spring to leading shoe.
7. Engage leading shoe in wheel cylinder slot followed by trailing shoe and align.

NOTE: During this operation the adjuster may become extended, this is not important but it must be reset prior to fitting brake drum.

8. Fit trailing shoe into abutment bracket followed by leading shoe.