Removal
WARNING: If fluid leaks from the master cylinder, disassemble it and check the piston seals for deformation or scoring. Replace defective parts.
1. Place vinyl tubes over the bleeder valves and drain the brake fluid from the system by depressing the brake pedal until the master cylinder is empty.
2. Unscrew the union nuts of the brake pipes.
3. Loosen the master cylinder mounting nuts.
Disassembly
1. Bend the tabs of the locking cover outward.
(The source of the article is on the website: «nissanbook.ru»)
2. Loosen the lock screw by pressing the pistons into the cylinder with a screwdriver (only in 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 inner surface of the cylinder. There should be no pits or scratches. If there is any damage, replace the cylinder.
Assembly
1. Insert the second circuit piston into the cylinder, then the first circuit piston.
Pay attention to the orientation of the piston seals as shown in the picture. Insert the pistons straight to avoid scratching the cylinder walls.
Align the slots in the second circuit piston with the hole for the locking screw (only for models with ABS).
2. Install the locking cap.
Before installing the lid, make sure the tabs are folded inward.
3. Press the tank connecting bushings into the cylinder body.
4. Insert the tank into the bushings.
5. Tighten the locking screw while simultaneously pressing the pistons into the cylinder using a screwdriver (only for models with ABS).
Installation
1. Place the master cylinder onto the brake booster studs and lightly tighten the nuts.
2. Finally tighten the master cylinder mounting nuts.
- Tightening torque: 11.7-14.7 Nm
3. Fill the reservoir with new brake fluid.
4. Cover all openings of the master cylinder with your fingers to prevent air from being sucked in when the brake pedal is released.
5. Have an assistant press the brake pedal several times until no more air comes out of the master cylinder.
6. Connect the brake pipes to the master cylinder.
7. Tighten the union nuts.
- Tightening torque: 15-18 Nm
8. Remove air from the system (see section "Removal air from the hydraulic drive").