Rear wheel drum brake
- 1 - cup;
- 2 - clamping spring;
- 3 - drive lever;
- 4 - brake shoe;
- 5 - upper coupling spring;
- 6 - spacer bar;
- 7 - adjusting wedge;
- 8 - wheel brake cylinder;
- 9 - brake shield;
- 10 - bolt;
- 11 - rod;
- 12 - eccentric;
- 13 - pressure spring;
- 14 - lower coupling spring;
- 15 - clamping spring of the spacer bar
Replacement of brake pads
The thickness of the friction linings of the brake pads must be at least 2 mm. Brake pads must be replaced as a set on both rear brakes.
1. Install support blocks under the front wheels.
2. Loosen the rear wheel bolts.
3. Raise and support the rear of the vehicle.
4. Remove wheel.
5. Check the position of the parking brake lever, which should be in the lowest position.
6. Remove brake drum (cm. subsection 8.2.3).
7. Click on the cup (see fig. Rear wheel drum brake) clamping spring and, turning it by 90°, remove it together with the clamping spring, while holding the cup rod on the back of the brake shield. Remove the spring and cups from the other pad in the same way.
8. Disconnect the lower return spring from the shoes.
9. Remove the lower socks of the pads from the lower stop and remove the brake pads, removing their upper socks from the grooves of the wheel cylinder pistons.
10. Disconnect the parking brake cable end from the actuating lever.
11. Clamp the lower ends of the blocks in a vise.
12. Disconnect the adjusting wedge pressure spring.
13. Disconnect the upper return spring.
14. Detach the clamping spring of the spacer bar and remove the spacer bar.
15. Clean all parts of the brake mechanism.
16. Connect the pressure spring to the new front shoe and spacer bar. Then, overcoming the force of the spring, insert the end of the spacer bar into the groove of the rear shoe and install the adjusting wedge, orienting it with the protrusion towards the brake shield.
17. Insert the other end of the spacer bar into the groove of the front shoe and install the upper return spring.
18. Connect the end of the parking brake cable to the actuating lever.
19. Insert the upper socks of the shoes into the grooves of the pistons of the wheel cylinder.
20. Install the lower return spring and insert the lower shoe toes into the lower support.
21. Install the adjusting wedge pressure spring.
22. Place cups with clamping springs on the rods and fix by turning them by 90°while holding the rods on the inside of the brake shield.
23. Install the brake drum.
24. Install the wheel.
25. After finishing work, vigorously press the brake pedal several times to set the required clearances between the pads and the working surface of the drums.
Warning: If lubricant is found on the brake parts, the axle bearing seal must be replaced.
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