1. Screw; 2. Air removal valve; 3. Guide pin; 4. Anther; 5. Screw; 6. Washer; 7. Caliper bracket; 8. Brake caliper; 9. Oil seal; 10. Piston; 11. Piston boot; 12. Brake shoe; 13. Retainer; 14. Anti-friction lining
Withdrawal
1. Remove the front wheel. Nut tightening torque: 90-110 Nm.
2. Remove the guide pin screws (1) and lift the brake caliper (2) up. Check for damage to the anthers and brake hose.
Note: If you need to remove the brake caliper, disconnect the brake hose.
3. Remove the anti-friction lining (3), clamps (4) and brake pads (5).
4. Remove the screws and remove the caliper bracket.
5. Remove the brake disc from the hub. If the disk «grabbed» to the hub due to overheating or corrosion, to remove it, screw into the hole (6) screw M8.
Note: When removing the disc, do not use a hammer to avoid damaging the hub or disc.
Examination
Brake Disc 4
6. Clean the surface of the brake disc and measure its thickness at 4 equidistant points. Nominal value: 22.0 mm. Minimum allowable value: 20.0 mm. The difference between all measured values must not exceed 0.05 mm. If the measured value is less than the limit, replace the brake disc.
Note: brake disc and pads are replaced as a set on both sides.
7. Install a dial gauge approximately 5 mm from the edge of the disc and check for runout. Rated value: less than 0.03mm.
8. If runout is greater than rated, replace disc hub and recheck runout.
Note: Before removing the disc, mark the stud on the side of the most runout with chalk.
9. If runout is within specification, rotate brake disc 180°from mark, install disc and recheck runout.
10. If the amount of runout cannot be corrected by changing the position of the disc, replace the brake disc.
Brake pads
11. Check friction lining wear. Nominal value: 11.0 mm. Minimum allowable value: 2.0 mm. If the measured value is less than the limit, replace the brake pads.
12. Check up absence of traces of oil and greasing on surfaces of brake pads.
Installation
13. Install the brake disc and caliper bracket. Screw tightening torque: 78-96 Nm
14. Install the retainers, anti-friction lining and brake pads in the caliper bracket.
15. Use a suitable tool to push down the piston (7) into the caliper to install the pad.
16. Lower the caliper down. Be careful not to damage the anthers of your fingers. Install and tighten the guide pin screws. Tightening torque: 22-32 Nm.
Note: if the caliper was removed, connect the brake hose.
17. Bleed the brake hydraulics and check for leaks.