A clutch master cylinder is a component found on vehicles equipped with manual transmission, and serves as the pump for the hydraulically operated clutch system.

As they are hydraulic in nature, clutch master cylinders are often prone to issues with leaks that will interfere with its ability to displace fluid.

Internal damage may occur, resulting in fluid leakage and improper hydraulic pressure. Do not allow dust, dirt, and debris to enter the cylinder or reservoir tank.