Other Areas of Problem Noise and Vibration

Excessive wear on diaphragm tips and a highly glazed pressure plate casting.

  • CAUSE
    • Lack of free travel/bearing riding on diaphragm.
    • Driver resting foot on clutch pedal.
    • Quill shaft worn/bearing stuck on a worn spot and not returning to original position.
    • Clutch slave cylinder corroded or worn and piston not returning to allow free travel.
    • Stretched or sticky cable.
  • SOLUTION
    • Adjust free play in clutch to specification.
    • Driver education.
    • Replace quill shaft (gear box main drive nose cone).
    • Replace clutch slave cylinder and check pressure build up in clutch master cylinder.
    • Replace cable. (Do not re-oil old cable).

Damaged clutch thrust bearing. Diaphragm spring excessively worn.

  • CAUSE

    • The clutch has not been adjusted correctly since installation or the clutch has never been adjusted during any routine service. The clutch thrust bearing and the diaphragm of the clutch cover pressure plate assembly have worn indentations into each other.

  • SOLUTION
    • All care should be taken when replacing bearing carrier on the clutch fork. Also ensure the retaining spring clip has sufficient tension.
    • Always work clutch thrust bearing carrier both forward and backward to ensure that the fork is retained firmly on the carrier saddle.