TIAGO TIGOR CNG - SERVICE MANUAL

CLUTCH_CNG 9 6. Vibrations through the Pedal When Starting to De-clutch Pedal vibration when starting to De-clutch. The fingers of diaphragm are out of line and show sign of damage. The gearbox input shaft has struck the fingers of the diaphragm on fitting. Carefully guide in the gearbox to avoid any knocks on fitting. 7. Metallic Sound with Pedal Fully Depressed Metallic sounding noise affected by engine speed with pedal fully depressed. Signs of rubbing on the diaphragm fingers, in the area of contact with the release bearing. Incorrect clutch adjustment excess travel. Systematically check the condition of cable linkage and automatic adjuster. Always refer to vehicle workshop manual for correct adjustment. 8. Excessively Heavy Pedal The pedal is hard to depress. This stiffness increases overtime. The tips of the diaphragm fingers are worn away by the release bearing. The bearing can appear to be in good condition. The pre-load on the release bearing is too low or not existent. The pre- load spring is unhooked. During clutch installation thoroughly inspect all linkages and joints. Ensure that the clutch cable is smooth and free throughout its movement. Always refer to vehicle workshop manual for correct adjustment. The pre-load should be minimum of 50 N to a maximum of 80 N. 9. Noisy Clutch The clutch is noisy and the pedal cab be slack. A location lug on the release bearing has broken. A lug has broken. Another fault in the mechanical operation of the lug to break. For example, the fork is out of shape or wrongly positioned at the time of assembly. Check the fork and guide sleeve and replace if signs wear are present. Ensure components are lubricated. Carefully check at the clutch cable. 10. Excessively Heavy Pedal 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 release bearing is hard when rotated by hand. The bearing has seized or was noisy from the start. Or the bearing has overheated, burning off the grease caused by incorrect pre-load. Systematically check the clutch cable, linkages; joints fork bearing, pre-load spring.