The clutch master cylinder refers to the part connected to the clutch pedal and connected with the clutch booster through the oil pipe. It is used to collect the pedal travel information and separate the clutch through the action of the booster.
There is a radial long round through hole in the middle of the piston of the clutch master cylinder. The direction limiting screw passes through the long round hole of the piston to prevent the piston from rotating. The oil inlet valve is installed into the axial hole at the left end of the piston, and the oil inlet valve seat is inserted into the piston hole through the straight hole on the piston surface.