| Function check for clutch master cylinder and slave cylinder |
| Before you renew the clutch master cylinder or slave cylinder you must - in the case of the following faults - first carry out the appropriate checks. |
| Noises when operating the clutch: |
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| First check the over-centre spring / clutch pedal switch for noise. |
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| If you hear a noise, remove over-centre spring and repeat check. |
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| Renew relevant component. |
| After releasing clutch pedal it still remains depressed / does not return to its initial position. |
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| Check whether the clutch pedal returns all the way to its initial position, thereby uncovering the vent opening in the master cylinder. |
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| Check that footwell trim and/or floor mats are not trapped. |
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| Make the customer aware that the driver must NOT rest his/her foot on the clutch pedal for long periods of time. |
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| This could impair the self-bleeding function of the clutch system as the vent opening in the clutch master cylinder can no longer function. |
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| The vent opening must be uncovered, otherwise the permanent self-bleeding function for the hydraulic clutch system will no longer be effective. |
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| The vent opening is integrated in the clutch master cylinder. It is not visible from the outside. |
| Check the complete hydraulic system for leaks. |
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| Check brake fluid level in brake fluid reservoir. |
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| Check clutch master cylinder and slave cylinder as well as the pipe/hose assembly including connections for external leaks (visual inspection). |
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| If you identify any leaks you must renew the leaking component. |
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| - approx. 140 N for complete service life of the clutch |
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| - approx. 125 N for complete service life of the clutch |
| Clutch does not disengage or does not disengage fully: |
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| Air in hydraulic system: bleed clutch system → Chapter and check hydraulic system for external and internal leaks. |
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| Clutch plate does not move smoothly on input shaft splines. |
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| Foreign body in clutch system. |
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| Wrong components used or components forgotten when carrying out repair work (e.g. intermediate plate). |
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