CLUTCH_DIESEL 13 5. LOSS OF DRIVE Loss of drive The friction material has come off from both sides (centrifuged). The shattered linings are lodged into the cover assembly or are loose in the clutch housing. Some part of driven plate could be broken Error by driver - e.g. accidentally changing from 4th to 2nd gear at higher road speeds like 60kmph. Allow the vehicle speed to reduce before shifting to a lower gear. Clutch ineffective or not operating Vehicle cannot be shifted in any gear Clutch does not get disengaged Hydraulic system malfunctioning. Replace the faulty component. Check for leakages and rectify them. Bleed the system if required Check the clamps and replace if necessary. 6. VIBRATIONS THROUGH THE PEDAL WHEN STARTING TO DE-CLUTCH Pedal vibration when starting to De-clutch. The fingers of the diaphragm are out of alignment and show signs of damage. The gearbox input shaft has struck the fingers of the diaphragm on fitting. Carefully guide in the gearbox to avoid the input shaft hitting the cover on fitting. 7. HARSH NOISE ON DECLUTCHING A harsh whistling noise can be heard either on declutching or all the time. It varies according to the pressure applied to the pedal. The movement of the CSC assembled throw-out bearing is hard when rotated by hand. The bearing has seized or was noisy from the start. OR the bearing has overheated, burning of the grease caused by incorrect pre-load. Replace concentric slave cylinder assembly. 8. SLIPPING AND JUDDERING. The clutch slips and eventually judders. The pressure plate burn marks. Driver resting foot on pedals. Incorrect master cylinder fitment. Always refer to the vehicle workshop manual for correct fitment of CSC, conventional clutch and CMC. Educate the driver, to use clutch pedal only while changing gears & avoid resting feet on it.
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