The function of the clutch system is to ensure smooth and reliable engagement between the engine and the transmission system, as well as temporary yet complete disengagement. Engagement refers to the generation of friction torque, while disengagement refers to the removal of friction torque. Clutches operate frequently, and during vehicle operation, various components are prone to wear, deformation, or cracking due to sliding friction, which in turn reduces the friction torque and leads to clutch system malfunctions. Therefore, to maximize the service life of the clutch, it is crucial to know how to effectively maintain the clutch system properly. Common faults that occur during the use of the clutch include heavy pedal feel, slipping, incomplete disengagement (difficulty in shifting gears), shaking, and abnormal noise.

1. Fault phenomenon of heavy clutch pedal

The clutch pedal feels heavy underfoot, and the foot tends to get fatigued. There is a noticeable difference in pedal force compared to other vehicles. Fault cause:

(1) Separating the master cylinder assembly: Improper adjustment, pedal too high, and no free play

(2) Driven disc (friction plate) assembly: The friction plate has suffered significant wear, reaching the rivet of the friction plate

(3) The clutch master cylinder, slave cylinder, release fork, release bearing, etc. are stuck and not moving flexibly

(4) The working surfaces of the flywheel and the pressure plate are severely worn (with wear exceeding 0.5mm)

(5) Excessive wear of the release finger (indicating that the end arc has been worn flat) and excessive wear of the release bearing (indicating that the thrust plane has been worn into a concave arc)