Attention! Cylinders are changed only in pairs per axle, it is forbidden to change them individually. Repair kits for wheel cylinders are supplied as spare parts.
1. Remove drums and pads.
2. Turn away the union of a tube of a hydrodrive and disconnect a tube.
3. Turn away two bolts of fastening of the wheel cylinder to a brake board.
4. Remove the cylinder.
5. Plug the brake line pipe and cylinder bore to prevent loss of brake fluid and entry of dirt.
6. Remove the rubber dust covers from the cylinder and remove both pistons, piston seals and spring (see photo).
8. Check the condition of the cylinder surface. When severe damage is found (scratches, corrosion and/or scratches) replace the cylinder. If the damage is minor, then the cylinder can be honed, although the manufacturer recommends that the cylinder be replaced for any damage.
9. If the cylinder is in satisfactory condition, then wash the parts with alcohol or brake fluid. Turn out the union for removal of air, dry and blow out channels of the cylinder. Lubricate new cuffs with brake fluid.
10. Establish cuffs on pistons so that edges of cuffs were turned in the cylinder. Assemble the cylinder.
11. Install the cylinder in the reverse order of removal, tighten the bolts by hand. Screw the fitting and finally tighten the mounting bolts. Tighten the fitting and install the shoes and drum.
12. Remove air from the hydraulic actuator.
13. Before leaving, check the operation of the brakes.