Clutch Slipping

Indicator:

Clutch Slipping

Cause:

1. The clutch hydraulics may have a failure
2. Incorrect clutch free travel setting
3. Vehicle is constantly overloaded
4. Incorrect clutch for the application
5. Poor driving practices (the driver resting their foot on the clutch pedal when driving)
6. The clutch is worn beyond its service life

Effect:

The vehicle is unable to drive correctly and has a burning smell coming from the gearbox area.

Action:

1. Assess the vehicle loads and conditions the vehicle is being used for.
2. Driver training and education if necessary
3. Check the vehicle hydraulics. This can be done by either undoing the bled nipple on the slave cylinder or pushing the slave cylinder pushrod back by hand. If there is residual line pressure the fluid will “shoot” out when cracking the bleeder. If trying to push the pushrod back again holding line pressure will prevent the pushrod from moving in the slave bore. In both cases it would identify a master cylinder problem or a clutch pedal over adjustment.
4. Check the clutch free travel settings. The clutch pedal should have some “free” movement at the top of the pedal.
5. If the clutch is worn beyond its service life it will need replacing.