1. Support pin pads; 2. Clearance adjuster; 3. Top return spring; 4. Adjusting lever; 5. Brake shoe; 6. Compression spring; 7. Lower return spring
Withdrawal
1. Remove the rear wheel. Nut tightening torque: 90-110 Nm.
2. Remove the brake drum.
3. Remove the preload spring and support pins (1) pads. Remove the top return spring (2).
4. Lower the brake pads (3) and remove the lower return spring (4). Remove the gap adjuster being careful not to damage the wheel cylinder boots.
5. Disconnect the parking brake cable from the brake lever.
6. Remove the brake pads.
7. Disconnect the brake pipe (5) from the working cylinder (6). Loosen the screws (7) and remove the wheel cylinder (6) from the brake shield (8).
Examination
Brake pads
8. Check for leaks from the wheel cylinder (9). Check friction linings (10) pads for cracks, nicks, excessive wear and traces of oil or brake fluid.
9. Check the thickness of the friction linings (WITH) (excluding pad thickness). Rated value: 3.9-4.5 mm. Minimum allowable value: 1.0 mm. If the measured value is less than the minimum value, replace the brake pads as a set.
Brake drum
10. Use a caliper to measure the inside diameter of the brake drum. Rated value: 203.2 mm. Maximum ovality: 0.06 mm. If the measured value is less than the nominal value, replace the brake drum.
11. Check the drum for mechanical damage and oil traces.
12. Check the fit of the brake shoe to the inner surface of the drum.
Installation
13. Apply sealant (11) on the contact surface of the wheel cylinder (12) to the brake pad (13). Install wheel cylinder (13) and connect the brake pipe (14).
14. Connect the parking brake cable to the lever.
15. Clean the threaded (15) and working (16) clearance adjuster parts. Apply lubricant to the threads of the regulator.
Note: to bring the pads together or apart, turn the adjusting screw (17).
16. Hook the adjusting lever and install it on the brake shoe.
17. Install lash adjuster and upper return spring (18) in the right direction. Install lower return spring (19).
18. Apply wheel cylinder grease to the sliding surfaces at the indicated locations. Do not apply grease to friction pads.
19. Apply wheel cylinder grease to the ends and back of the pads at the locations shown (points of contact between pads and brake shield). Do not apply grease to friction pads.
20. Install pads (20) on the brake pad. Install the pad pins (21) and retaining spring.
21. Install the brake drum.
22. Bleed the brakes and adjust the parking brake.