The clutch control system transfers the force from the clutch pedal to the release bearing. Two types of control systems are most commonly used: mechanical and hydraulic.
In mechanical clutch control systems, the movement of the clutch pedal and the force applied to it are transferred to the release bearing via a set of levers and tie rods. In hydraulic control systems, the pump connected to the clutch pedal is wired to the actuator. The actuator is coupled to the lever that controls the position of the release bearing. The system is filled with liquid. Depressing the clutch pedal moves the piston in the pump. The fluid is forced into the actuator, in which it presses on the plunger, causing it to shift. The actuator piston uses a lever to move the release bearing, disengaging the clutch.