Check for a stuck concentric slave cylinder.

Replace the concentric slave cylinder. Refer to Clutch Concentric Actuator Cylinder Replacement.

Check for improper return of clutch oil.

Perform the air bleeding.

Check for a worn clutch disc or oil contamination.

Replace the necessary clutch components. Refer to Clutch Assembly Replacement.

Check for a warped pressure plate.

Replace the necessary clutch components.

Check for the driver improperly operating the vehicle.

Correct the driver's operation of the vehicle, as necessary.

Check for an oil-soaked clutch disc.

Correct the leak at its source and install a new clutch disc.

Check for a worn facing or a facing torn from the disc.

Replace the worn disc with a new disc.

Check for a warped pressure plate or a warped flywheel.

Replace the warped pressure plate or the warped flywheel.

Check for a weak diaphragm spring.

Replace the pressure plate.