Clutch is a kind of mechanical transmission device, which is mainly used to connect or disconnect the transmission system between the engine and the transmission to realize the operation of starting, shifting and stopping. The function of the clutch is to transfer the engine power to the wheels through the transmission system, and to separate the engine from the transmission when necessary, so as to avoid the engine running all the time while the vehicle is running, wasting fuel and damaging the engine. The structure of clutch is mainly composed of clutch disc, clutch pressure plate, clutch shell, clutch bearing and clutch separator. Among them, the clutch disc is a component that connects the engine and the transmission through a friction surface, and the clutch pressure plate is a component that connects the clutch disc with the engine through pressure. As an important transmission component, the clutch needs regular maintenance to ensure its normal operation and prolong its service life
