When the driver depresses the clutch pedal, the push rod pushes the piston of the master cylinder to increase the oil pressure and enters the wheel pump through the hose, forcing the wheel pump rod to push the release fork and push the release bearing forward; when the driver releases the clutch pedal, The hydraulic pressure is released, the release fork gradually returns to its original position under the action of the return spring, and the clutch is in the engaged state again.
There is a radial oblong through hole in the middle of the piston of the clutch master cylinder.
The limit screw passes through the oblong 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.