2. Remove the expansion tank.
3. Remove the sealing ring from the master cylinder.
Caution: When removing the retaining ring, be careful not to damage the piston or cylinder walls.
4. Remove the retaining ring from the master cylinder body. When installing the retaining ring, replace the retaining ring with a new one. If necessary, a rod of suitable diameter can be used to secure the second piston (see picture).
5. Remove the piston of the first brake circuit. Then remove the piston of the second brake circuit.
6. Assembly is carried out in the reverse order. Before installing the first and first pistons, lubricate the cylinder surface with clean brake fluid.