F 250 2WD Pickup V8-351 5.8L VIN H 4-bbl HP (1985)
Clutch Disc: Description and Operation
DESCRIPTION AND OPERATION
The purpose of the clutch is to connect and disconnect a manually operated transmission and the remainder of the power-transmission system from
the engine. This permits starting and stopping the vehicle, shifting and changing speeds that correspond to the engine speed through gear
reductions for both forward and reverse directions.
The clutch consists of a driven plate (clutch disc) splined for the input shaft of the transmission and the clutch housing (pressure plate).
This forms a continuous system by which rotation of the engine is connected to the transmission by solid member when engaged (clutch assembly).
For power at the output shaft of the transmission or rear wheel rotation (forward or reverse), the driven plate is a metal disc, faced on both sides
with woven friction materials. The pressure plate is a metal member bolted on the flywheel which houses the driven plate held in position by the
transmission input shaft. A clutch sleeve mounted over the input shaft of the transmission carries a release bearing that is pressed against the
fingers of the clutch that pushes it away from the driven plate causing disengagement-breaking the connection between the engine (flywheel) and
the clutch. Reverse action or the release of the bearing engages the clutch. The release lever is actuated by a hydraulic system.
Other internal clutch parts are a pilot bearing mounted in the crankshaft which supports the end of the input shaft. Bearings are designed for long
life and require no lubrication.
