What are the fault diagnosis and troubleshooting methods for the clutch?

[LeEmilia]

The fault diagnosis method for the clutch is: when the engine is idling, even if the clutch pedal is fully depressed, shifting gears is difficult, and there is a clashing sound from the transmission gears. If the gear is barely engaged, the car may start moving or stall before the clutch pedal is released. The main troubleshooting methods are: 1. Check if the clutch pedal's free travel is too large and adjust it accordingly. 2. Check if the height of the release levers is uniform and not too low. Under the car, move the release fork so that the front end of the release bearing lightly touches the inner end of the release lever. Rotate the clutch one full turn to inspect. If the inner ends of the release levers do not simultaneously contact the release bearing, it indicates uneven height of the release levers, which should be adjusted. If the release levers are of uniform height but still do not fully disengage, check the lever height. Adjust all release levers to the same height. If full disengagement is achieved, it suggests the previous adjustment was incorrect or excessive wear has occurred. After adjusting the release levers, the clutch pedal's free travel must be readjusted. 3. If the above adjustments are normal but the clutch still does not fully disengage, remove the clutch and check if the driven plate is installed backward, if axial movement is difficult, if the main and driven plates are warped, if the release lever screws are loose, or if the floating pins have fallen off. 4. For a clutch with newly riveted friction plates, check if the driven plate and friction plates are too thick. If they are too thick, add shims between the clutch cover and the flywheel. 5. For hydraulically operated clutches, in addition to the above checks, also check if the brake fluid is insufficient, if the pipes are leaking, and bleed the air from the hydraulic system.