12 Rear drum brake (r and t

models) - removal, inspection ^,

and installation ^

Removal

1. Inspect the rear brake wear indicator (see Chapter 1, Section 3).

2. Remove the rear wheel (see Section 16) and lift out the brake backplate.

3. Unscrew the brake arm pinch bolt and remove the arm from the brake camshaft, noting the alignment punchmark (see illustration).

4. Remove the brake wear Indicator, noting how the wide spline aligns with the wide groove on the shaft, and the felt seal.

5. Mark the brake shoes to aid reassembly; if they are not going to be renewed they must be installed in their original positions. Note the position of the brake springs; the black spring

11.7B Do not allow the fluid to fall below the lower level mark (arrowed) in the front...

11.7C ... Or rear brake fluid reservoir

12.3 Pinch bolt (a), alignment marks (b) and wear indicator (c)

Brakes, wheels and tyres 7*15

12.5 Spring ends (a) and brake cam (b)

fits next to the brake cam, the blue spring fits next to the shoe pivot posts. Note also that the open ends of the springs face away from the backplate. Mark the end of the brake cam to aid reassembly (see illustration).

6. Remove the split pins from the shoe pivot posts, remove the plate, and pull the shoes off the backplate together with the brake cam (see illustration).

7. Fold the shoes towards each other to release the spring tension and separate the shoes (see illustration).

Inspection

8. Check the linings for wear, damage and signs of contamination from road dirt or water. If the linings are visibly defective, renew them.

9. Measure the thickness of the lining material (just the lining material, not the metal backing) and renew the shoes if the linings are worn below the minimum specified at the beginning of this Chapter at any point (see illustration).

10. Check the ends of the shoes where they contact the brake cam and the pivot posts. Renew the shoes if there's visible wear.

11. Check the lugs on the shoes where the springs locate for wear. Also make sure that the springs are not stretched and that the hooked ends are not deformed.

12. Clean all old grease from the pivot posts and the brake cam and check them for wear. Also clean any old grease from the cam pivot hole in the backplate and check that the cam is a good fit in the hole.

13. Check the inside of the brake drum for wear or damage. Measure the inside diameter

12.6a Remove the split pins (A) and plate (B)...

of the drum at several points with a vernier caliper. If the measurements are uneven (indicating that the drum is out-of-round) or if there are scratches deep enough to snag a fingernail, have the drum turned (skimmed) to correct the surface. If the wear or damage cannot be corrected within the service limit specified at the beginning of this Chapter, the wheel must be renewed.