2. Take out a sealant of a brake hose from an arm on a rack.
3. Loosen the hose fitting on the brake cylinder.
4. Bend the tabs of the lock washers with a screwdriver and unscrew the two caliper mounting bolts, holding the guide pins by the hexagons with the second key.
5. Take out bolts and remove a support in gathering with the cylinder.
6. Holding the hose fitting by the hex wrench, unscrew the cylinder from the tip.
Be careful - brake fluid will flow from the hose. Please note that the fitting has a copper sealing ring. Replace heavily compressed ring.
7. Clamp the caliper in a vise and remove the two hexagon bolts securing the cylinder to the caliper. Remove the cylinder from the caliper.
8. Carefully, so as not to tear the protective cover, remove the retaining ring.
9. Remove the protective cover from the cylinder.
10. After supplying compressed air through the holes for supplying brake fluid, remove the piston from the cylinder.
11. Carefully, so as not to damage the cylinder mirror, remove the sealing ring.
12. If it is necessary to replace the cylinder or the valve itself, unscrew the air release valve.
13. Carefully inspect the cylinder mirror and piston working surface. If they show signs of wear, damage or severe corrosion, replace the cylinder and piston.
14. Replace damaged, swollen, or loose O-ring. It is recommended to replace the ring every time the cylinder is disassembled, regardless of its condition.
15. Install a new sealing ring in the cylinder groove, having previously lubricated it with brake fluid.
16. Insert the edge of the protective cap into the groove of the piston.
17. Grease a cylinder mirror and a piston working surface with a fresh brake liquid. Insert the piston into the cylinder and install the outer edge of the protective cap into the groove of the cylinder body. Install retaining ring.
18. Install the brake cylinder in the reverse order of removal. Before installing the guide pins, lubricate them with Uniol-1 grease.
19. Remove air from the brake hydraulic system (see «How to bleed the brakes»).