2141Clutch pedal with overcentre spring

With this clutch pedal arrangement, the over-centre spring supplements the foot pressure applied when disengaging the clutch, right up until the diaphragm spring clutch is fully disengaged (Fig. 2.21). It also holds the clutch pedal in the 'off position. When the clutch pedal is pressed, the master cylinder piston forces the brake fluid into the slave cylinder. The slave piston moves the push rod, which in turn disengages the clutch. After the pedal has been depressed approximately 25 mm of its travel, the over-centre spring change over point has been passed. The over-centre spring tension is then applied as an assistance to the foot pressure.

Adjustment of the clutch is carried out by adjusting the pedal position on the master cylinder push rod.

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