A clutch actuator for transmitting a disengaging force to a disengaging device of a clutch includes an actuating element to which the disengaging force can be applied and includes a piston rod for transmitting the disengaging force from the actuating element to the disengaging device. The piston rod is mounted against a connection region of the actuating element such that the piston rod can be moved towards the connection region by the clutch reaction force of the clutch, and the positioning of the connection region and the piston rod relative to each other as a result of the movement can be fixed by applying the disengaging force to the actuating element. The actuating element is designed to at least partly deflect the disengaging force so as to produce a normal force and/or a radial force which acts between the connection region and the piston rod, and the normal force and/or the radial force fixes the position of the connection region and the piston rod relative to each other.

An apparatus for adjusting a clearance of a clutch cable for a vehicle is arranged to rotate a clutch pedal forward using an elastic force of a reverse return spring to allow a back surface of the clutch pedal be spaced apart from a pedal member, control a length of the clutch cable using a mechanical clearance adjusting mechanism, and secure a uniform gap between the pedal member and a back surface of the clutch pedal by adjusting the length of the clutch cable.