P42.20-2331-04
1 Brake drum
2 Brake shoes
a Dimension
b Dimension
Modification notes
| Removing | ||
1 | Remove brake drum (1) | ||
| Remove/install brake drum | ||
| Cleaning | ||
2 | Clean brake | Use a commercially available brake cleaner. | |
| Checking | ||
3 | Check boots of wheel brake cylinders for damage and wheel brake cylinders for leaks | Carry out visual inspection. If the boots and/or wheel brake cylinders are faulty, the wheel brake cylinder must be replaced. See: | |
| Remove/install wheel brake cylinder | ||
| Measure | ||
4 | Measure inside diameter of brake drum (1) and outside diameter of brake shoes (2) diagonally | Deduct dimension (a) and dimension (b). The difference (the "air gap") between dimension (a) and dimension (b) should be 0.6 mm. | |
Brake drum caliper gauge | |||
If the difference (the "air gap") is greater than 0.6 mm, the brake adjuster must be readjusted or, if necessary, replaced if it is faulty. See: | |||
| Install, remove automatic brake adjuster | ||
5 | Grind off brake drum (1) and brake shoes (2) with emery cloth | Remove any dirt from the surfaces. | |
| Install | ||
6 | Install brake drum (1) | ||
| Remove/install brake drum |
Workshop equipment
WE58.40-Z-1005-19A | Brake drum caliper gauge |