The clutch pressure plate has friction discs, just like the brake pads on the wheels, made of durable asbestos and copper wires. The friction discs on the pressure plate also have a minimum allowable thickness, and they need to be replaced after a long mileage. Previously, the replacement of friction discs could be bought as spare parts and replaced by oneself, with the purchase of a total assembly of the pressure plate with the friction discs already installed, without the need to replace the discs oneself, just replace the clutch pressure plate. In order to reduce the wear of clutch discs, there is a correct method of using the clutch pedal. Do not half-press the clutch pedal. This puts the clutch disc in a semi-clutch state, meaning that the flywheel and the pressure plate are in a state of friction. If the clutch pedal is fully depressed, the flywheel and clutch pressure plate are completely separated, with no friction between them. If the clutch pedal is fully released, the flywheel and clutch pressure plate are fully engaged, and although there is also friction, there is basically no friction. Therefore, the clutch pedal cannot be pressed halfway.
If the clutch disc is cracked, the clutch disc cannot be tightly engaged, and the vehicle's power will deteriorate. The clutch is located between the engine and the gearbox, and can connect or disconnect the engine and gearbox. The clutch plate pressure plate is fixed on the flywheel of the engine, and there is a clutch disc between the pressure plate and the flywheel. There is a splined shaft in the center of the clutch disc, which fixes a transmission shaft, and the transmission shaft is the power input shaft of the gearbox.
There is a diaphragm spring on the pressure plate, which is responsible for pressing the clutch disc. If the diaphragm spring is damaged, the clutch disc cannot be pressed properly, and the clutch disc will slip when the engine is running. If the clutch disc wears severely and the thickness of the clutch disc is insufficient, the diaphragm spring cannot press the clutch disc, and the clutch disc may slip. If the free play of the clutch pedal is inappropriate, the clutch disc cannot be depressed, which may cause slipping.
If the clutch disc is damaged, the clutch disc cannot be fully engaged during driving, and most of the engine power cannot be transmitted to the gearbox, and the car will not be able to accelerate. If the clutch disc keeps slipping, there may be a burning smell in the cabin. If the clutch disc is damaged, it needs to be repaired in a timely manner. The replacement of the clutch disc is very troublesome. When replacing the clutch disc, the connection between the engine and the gearbox needs to be disassembled, and the gearbox needs to be lifted up to replace the clutch disc.
The clutch plate pressure plate, clutch disc, and release bearing are the clutch three-piece suit, and there is no clear provision for the service life of the pressure plate. However, as an important part of the transmission system, the clutch can generally be used for the same lifespan as the car under normal conditions. Therefore, regular maintenance is the most important thing to prevent problems before they happen.