Clutch Construction
The clutch is a diaphragm spring clutch of a dry single disc type. The diaphragm spring is of a tapering-finger type, which is a solid ring in the outer diameter part, with a series of tapered fingers pointing inward.
The disc, carrying four torsional coil springs, is slidably mounted on the transmission input shaft with a serration fit.
The clutch cover is secured to the flywheel, and carries the diaphragm spring in such a way that the peripheral edge of the spring pushes on the pressure plate against the flywheel with the disc in between, when the clutch release bearing is held back. This is the engaged condition of the clutch.
Depressing the clutch pedal causes the release bearing to advance and pushes on the tips of the tapering fingers of the diaphragm spring. When this happens, the diaphragm spring pulls the pressure plate away from the flywheel, thereby interrupting the flow of drive from flywheel through clutch disc to transmission input shaft.
1. Crankshaft 6. Diaphragm spring 11. Clutch release fork clip
2. Flywheel 7. Release bearing 12. Release fork
3. Clutch disc 8. Input shaft bearing 13. Clutch release fork support
4. Pressure plate 9. Input shaft      
5. Clutch cover 10. Clutch operating cylinder