Removing
1. Loosen the parking brake adjusting nut.
2. Drain the brake fluid.
3. Remove the brake drum (pic. 15.46).
Pic. 15.46. Rear drum brake: 1 - brake drum; 2 - upper return spring; 3 - spring of the automatic regulator; 4 - lower return spring; 5 - automatic gap adjuster assembly; 6 - brake shoe holder cap; 7 - brake shoe holder spring; 8 - brake shoe; 9 - brake shoe holder; 10 - brake shoe and parking brake lever assembly; 11 - brake pipe connection, 15 Nm; 12-working brake cylinder; 13 - retaining ring; 14 - hub cap; 15 - hub flange nut, 180 Nm; 16 - rear wheel hub assembly; 17 - drum brake support shield
4. Remove the upper brake shoe return spring.
5. Remove the auto adjuster spring.
6. Remove the automatic governor lever.
7. Remove the automatic regulator assembly.
8. Remove the lower brake shoe return spring.
9. Remove the brake shoe holder cap.
10. Remove the brake shoe holder spring.
11. Remove the brake shoe with lining assembly. Do not press the brake pedal before installing the brake pads. To prevent the pistons from falling out of the working brake cylinder, secure the pistons with an appropriate rubber band or wire.
12. Remove the brake shoe and parking brake lever assembly.
13. Move the parking brake lever from the removed brake shoe to the new brake shoe. Use a flat screwdriver to release the retainer and remove it from the removed brake pad (pic. 15.47).
Pic. 15.47. Using a screwdriver to remove the latch
14. Remove the bulge washer.
15. Remove the parking brake lever.
16. Turn away a nut and disconnect a brake tube st of the working brake cylinder. Turn out bolts and remove the working brake cylinder.
17. Remove the retaining ring.
18. Remove the hub cap.
19. Turn away a flange nut of a nave.
20. Remove the rear wheel hub assembly.
21. Remove the drum brake support shield.
Installation
1. Installation is carried out in the reverse order of removal, taking into account the following.
2. Install the parking brake lever on the brake shoe, while installing the spherical washer in the position shown in Figure 15.48.
Pic. 15.48. Mounting position of spherical washer
3. Install the latch and compress it with pliers (pic. 15.49).
Pic. 15.49. Installation of a clamp of fastening of the lever of a drive of a parking brake
4. Clean the rear brake elements. Apply SAE J310, NLGI No. 1 High Temperature Lubricant to the pad contact areas of the drum brake backing plate, brake cylinder, and brake pad support (pic. 15.50). Avoid getting lubricant on the friction linings of the brake pads.
Pic. 15.50. High Temperature Lubricant SAE J310, NLGI No. 1
5. Remove air from the hydraulic drive of the brake system.
6. Adjust the travel of the parking brake lever.