Contamination of Friction Surfaces

Indicator:

Slipping clutch/Judder.

Cause:

1. Excessive grease used upon installation (Bearing Slide and/or shaft splines)

2. Incorrect lubricant

3. Rear main seal leak

4. Front gearbox seal leak

5. Poor practice of cleaning the clutch components prior to installation.

Effect:

Oil/Grease or other contaminants on the friction surfaces.

Action:

1. Replace Clutch kit
2. Lightly grease spline, wipe off excessive grease after tentative installation and ensure there is smooth sliding of clutch disc on main drive shaft.
3. Remove any excessive grease from the bearing slide after tentative installation.
4. Clean pressure plate surface and flywheel surface with a non-oil based solvent (Mentholated Spirits, Thinners or Brake Clean)
5. Inspect all engine and gearbox seals and if necessary replace.

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Trouble Shooting

Clutch Cover
- Engagement & disengagement(9)
- Loss of Drive(1)
- No Pedal (pressure)(1)
- Noise & Vibration(1)
- shudder (judder)(2)
- slip(6)
Clutch Disc
- Difficult Disengagement(10)
- Loss of Drive(5)
- Noise & Vibration(3)
- Other(2)
- Shudder (judder)(3)
- Slipping(6)
Clutch Master Cylinder(1)
Clutch Slave Cylinder(1)
Clutch Spigot Bearing, bush (pilot bearing)
- Difficult Engagement& Disengagement(1)
CSC (concentric slave cylinder)
- CSC Leaking(1)
- Loss of Fluid(5)
- Other(1)
Flywheel
- Other(1)
- Slipping(2)
- Vibration(1)
Thrust Bearing
- Noise & Vibration(6)
Vehicle Diagnostics(6)