Clutch Pedal Return

Your picture may not be good enough to show the OC spring.
Anyway, I believe it works such as this.......
The over center spring is what returns the pedal to the stock up stop once the pedal is past the over center position. It also assists your leg when pushing the pedal to the floor with a B&B 3 finger pressure plate.
It works in both directions.
If your over center spring has been removed intentionally, you likely have a diaphragm type pressure plate installed as opposed to a B&B 3 finger pressure plate.
Most diaphragm pressure plates require the spring to be removed as they do not return the pedal back to the over center position of the pedal as the spring is too strong. Leaving it in can cause undue pressure on the diaphragm pressure plate fingers, possibly causing clutch slippage.
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