Which component is responsible for applying force to the clutch disc?

The pressure plate is the component responsible for applying force to the clutch disc. When the clutch pedal is engaged, the release bearing pushes against the pressure plate, which, in turn, releases the pressure holding the clutch disc against the flywheel. When the pedal is released, the pressure plate springs back into position, pressing the clutch disc firmly against the flywheel. This action allows the engine power to be transferred through the transmission.

In contrast, the flywheel serves as a mounting surface for the clutch assembly and helps in the smooth engagement and disengagement of the clutch but does not apply force itself. The clutch switch is an electrical component that indicates the position of the clutch pedal, and the input shaft transmits power from the engine to the transmission but does not engage the clutch.