Master Brake and clutch cylinders

The master cylinder, also known as the master brake cylinder, converts the pressure on the brake pedal to hydraulic pressure by feeding brake fluid into the brake circuit and controlling this according to the mechanical force. Master brake cylinders are used both in disc brakes and drum brakes.

 In manual vehicles, the clutch pedal is connected to the clutch master cylinder, which converts the mechanical movement of the clutch pedal to hydraulic pressure. This makes working the clutch to change gears easier.