Removing
WARNING: If fluid is leaking from the master cylinder, disassemble it and check the piston cups for deformation or scoring. Replace defective parts.
1. Place vinyl tubes over the bleed valves and drain the brake fluid from the system by depressing the brake pedal until the master cylinder is empty.
2. Turn away cap nuts of brake tubes.
3. Turn away nuts of fastening of the main cylinder.
Disassembly
1. Bend the lock cover tabs outward.
2. Loosen the locking screw by pushing the pistons into the cylinder with a screwdriver (only models with ABS).
3. Remove the pistons from the cylinder. If the second circuit piston cannot be removed, supply compressed air to the cylinder through the fluid outlet.
Examination
Inspect the inside of the cylinder. It should be free of pitting and scratches. Replace cylinder if damaged.
Assembly
1. Insert the piston of the second circuit into the cylinder, then the piston of the first circuit.
Pay attention to the orientation of the piston cups, as shown in the figure. Insert the pistons straight to avoid scratching the cylinder walls.
Align the slots in the secondary piston with the hole for the set screw (only for models with ABS).
2. Install the lock cover.
Make sure the tabs are folded inward before installing the cover.
3. Press the tank connectors into the cylinder body.
4. Insert the tank into the bushings.
5. Tighten the locking screw while pushing the pistons into the cylinder with a screwdriver (only for models with ABS).
Installation
1. Put the master cylinder on the brake booster studs and lightly tighten the nuts.
2. Finally tighten nuts of fastening of the main cylinder.
- Tightening torque - 11.7-14.7 Nm
3. Fill the reservoir with new brake fluid.
4. Close all openings of the master cylinder with your fingers to prevent air being sucked in when the brake pedal is released.
5. Have an assistant depress the brake pedal several times until air stops coming out of the master cylinder.
6. Attach brake pipes to the main cylinder.
7. Tighten the union nuts.
- Tightening torque - 15-18 Nm
8. Remove air from the system (see section «Bleeding the hydraulic drive»).