The clutch release cylinder (also known as the clutch slave cylinder) is the component that transfers hydraulic pressure, achieved through the clutch master cylinder, into a mechanical force to control the clutch fork. The force from the release cylinder engages and releases engine power to the transmission.
The clutch release cylinder is composed of the piston, cups, spring, and push rod, built within a precision machined body and covered with a boot. The boot provides protection from dirt, dust and debris from contaminating the push rod and piston. When the clutch pedal is pressed and the fluid pressure reaches the release cylinder, the piston moves the push rod out to apply force onto the clutch fork which releases the clutch. When the clutch pedal is released, the hydraulic pressure and the force of the return spring pulls back the push rod and sends back the fluid to the master cylinder, therefore engaging the clutch.
The clutch master cylinder is a device that transforms mechanical force into hydraulic pressure. As the driver presses the clutch pedal, the pedal lever applies force to the clutch master cylinder which transmits hydraulic pressure to the clutch release (slave) cylinder that disconnects engine power to the transmission.
The clutch master cylinder structure consists of the piston, cups, and springs, built within a precision machined body. The primary cup, positioned on the leading side of the body, functions to create hydraulic pressure when fluid is forced inside by the piston. Located on the trailing side is the secondary cup, which guides the piston and prevents fluid from leaking. When the clutch pedal is pressed, the primary cup is blocked away by the piston from the oil spill port leading to the reservoir tank, pressure in the cylinder rises as the fluid is fed through the pipeline. When the clutch pedal is released, the hydraulic pressure and the force of the return spring pulls back the piston to relieve fluid back into the reservoir. The clutch master cylinder is what provides the necessary force to control the application of drivetrain power.