Fault Diagnosis in Clutches

Difficulty In Changing Gear:

• Poor alignment of shaft on spline, causing damage to spline teeth
• Dropping of cover assembly, resulting in damage to straps
• Poor fitment over location pins bending cover pressing
• Insufficient release travel
• Wear on cable or release mechanism

Loss Of Drive:

• Hanging on gearbox causing angular misalignment
• Excessive driving conditions resulting in damage to friction material

Judder:

• Copper based lubrication used causing glazing of friction material
• Driver resting foot on pedal causing a reduction of load between the pressure plate and flywheel
• Scored flywheel causing uneven take-up of clutch plate

Stiffness Of Pedal:

• Worn release shaft or bent fork
• Insufficient lubrication of release pivots
• Worn parts in release mechanism

Noisy Clutch:

• Broken or bent bearing carrier
• Seizes release bearing due to oil contamination or excessive pre-load

Slipping:

• Overheating of clutch unit due to resting of foot on pedal
• Jamming of automatic release mechanism

Slipping And Loss Of Drive:

• Cracked pressure plate due to excessive clutch slip/overheating
• Oil contamination causing glazing of non-asbestos friction material

Noise When In Neutral:

• Damage to drive plate causing damage to damper spring
• Excessive oil contamination into drive plate damper mechanism

Metallic Noise At Bottom Of Travel:

• Excessive release travel causing bearing carrier to touch diaphragm spring
• Excessive travel causing underneath of diaphragm spring to touch drive plate