A clutch slave master cylinder is essential in the operation of the clutch. The clutch is responsible for disconnecting the engine when you bring the vehicle to a stop. The clutch slave master cylinder is connected to a reservoir that stores hydraulic fluid. When the driver presses the clutch pedal the pressure from this act pushes an adjoining rod which is connected to the clutch slave master cylinder. The clutch slave master cylinder converts this mechanical pressure into hydraulic pressure by transferring the hydraulic fluid to the slave cylinder. This pressure is then applied to an attached pressure plate and finally to the clutch release bearing which brings the clutch into operation.

If you have an issue with the master cylinder you may first notice that you have trouble switching gears. You may also notice brake fluid by the pedals, suggesting a fluid leak. A loud noise may also be noticed when holding down the clutch pedal with the brake down. Lastly, you may notice less resistance when depressing the clutch pedal or a clutch pedal that is stuck to the floor. In this case the master cylinder needs replacing immediately.