Withdrawal
1. Remove the front wheel.
2. Turn out a hollow bolt and disconnect a brake hose from a support.
Attention!
- Brake fluid dissolves paint, plastic, and wire insulation, so if fluid accidentally comes into contact with paintwork or components, wash them with plenty of water.
- To prevent leakage of brake fluid, wrap the hose connections with rags or napkins.
3. Turn away a bolt of fastening of the cylinder of a support.
4. Remove the caliper and brake pads.
5. Turn away bolts of fastening directing blocks to a rotary fist.
6. Remove the shoe guide.
Examination
1. Check the caliper for wear, damage, cracks and rust.
2. Check the piston for rust, damage, cracks and wear on the outer surface.
3. Check bushing and guide pin for damage and rust.
4. Check springs and protective covers for damage.
5. Check the shoe guide for wear, damage, cracks and rust.
Attention!
- 1. Do not use sandpaper to clean the surface of the piston.
- 2. All rubber parts must be replaced with new ones.
6. Measure the brake disc thickness. Using a dial gauge, measure the runout of the brake disc a short distance from the outer edge.
Brake Disc Thickness:
- Rated: 19 mm
- Minimum allowable: 17 mm
- Maximum allowable runout: 0.04 mm
- Maximum permissible difference in brake disc thickness: 0.01 mm
Notes
1. Using a micrometer, measure the thickness of the disc in eight places, approximately every 45°at a distance of 10 mm from the outer edge of the disc.
2. Use a dial indicator to check the runout of the brake disc. Fix the dial indicator in any convenient place and, turning the brake disc, determine its runout at a distance of 5 mm from the outer edge.
7. Determine the value of the axial runout of the working surface of the disk as the difference between the largest and the smallest value of the runout.
Disassembly
1. Remove the piston dust cover.
2. Press the piston out of the caliper cylinder with compressed air.
Note.
- 1. When pushing the piston out with compressed air, do not place your fingers in front of the piston.
- 2. Be careful, as brake fluid is blown out of the channel with compressed air along with the piston.
3. Assemble the piston and piston boots in the following order.
- 1) Apply special grease to the walls of the caliper cylinder, the outer surface of the piston and the piston boot;
- 2) Install the piston cover as shown in the figure;
- 3) Insert the piston boot into the inner groove of the caliper and slide the piston into the caliper.
5. Install the brake pads.
Note. Never apply grease to the brake disc and brake pads.
Installation
Installation is carried out in the reverse order of removal, taking into account the following.
1. Install the brake pads and caliper. Never apply grease to the brake disc and brake pads.
2. Screw in and tighten the caliper mounting bolt to the required torque.
3. Screw and tighten a hollow bolt of fastening of a brake hose by the demanded moment of an inhaling.