Throw Out Bearings
The throw out bearing is what makes the clutch work. When the clutch is engaged by stepping on the clutch pedal, the throw out bearing moves toward the flywheel, pushing in the pressure plate's release fingers, and moving the pressure plate fingers or levers, against pressure plate spring force. This action moves the pressure plate away from the clutch disc, which stops the transmission of power to the gearbox.
The throw out bearing slides on a shaft at the front of the transmission housing. The clutch fork and connecting linkage convert the movement of the clutch pedal, to the back and forth movement of the clutch throw out bearing. In order to engage the clutch, the throw out bearing is moved toward the flywheel, by the clutch fork. As the bearing contacts the pressure plate's release fingers, it begins to rotate with the pressure plate assembly. The throw out bearing continues to move forward, and pressure on the release levers or fingers causes the force of the pressure plate's spring, to move away from the clutch disc. To disengage the clutch, the clutch pedal is released and the throw out bearing moves away from the pressure plate. This action allows the pressure plate's springs to force against the clutch disc, disengaging the clutch to the flywheel. Once the clutch is fully disengaged, the throw out bearing is normally stationary and does not rotate with the pressure plate.
Who Makes This
Where to Buy