Master brake cylinder: 1 - gasket, 2 - rubber bushings, 3 - reservoir set screw, 4 - cover, 5 - strainer, 6 - reservoir, 7 - boot, 8 - retaining ring, 9 - piston #1 and spring, 10 - piston #2 and spring, 11 - cylinder body, 12 - locking bolt
1. Using a screwdriver, remove the boot from the brake master cylinder
2. Remove the tank.
- A) Loosen the set screw and remove the tank.
- b) Remove the cap and remove the strainer from the tank.
3. Remove the two rubber bushings.
4. Place the cylinder in a vise.
5. Using a screwdriver, push the pistons all the way through and remove the retaining bolt with gasket.
Note: Wrap the screwdriver with electrical tape before use.
6. Removal of pistons with springs.
- A) Press the piston with a screwdriver and use the special tool to remove the circlip.
- b) Remove piston No. 1 with a spring, pulling it strictly along the axis without distortions.
Attention: if the piston is removed at an angle, the cylinder bore may be damaged.
- V) Lay a rag on two wooden blocks and lightly strike the cylinder flange against the blocks until the number 2 piston comes out.
Note: make sure the distance (A), indicated in the figure, from the rag to the top of the bars at least 100 mm.
Checking the Master Cylinder
Note: Blow out the disassembled parts of the brake cylinder with compressed air.
1. Check the cylinder bore for rust and nicks.
2. Check the cylinder for wear and damage. If necessary, replace the cylinder.