New Holland WorkMaster 50 Service Manual page 99

Clutch - Clutch and components
Clutch - Dynamic description
The clutch system is double clutch mechanical type. It includes two dry clutch discs with non-asbestos, organic ma-
terial pads. One clutch disc is to connect transmission to engine and another for connecting PTO directly to engine,
independent of transmission.
The clutch is located in front of the transmission. The transmission (main) clutch is operated by means of foot pedal
and PTO clutch is operated by hand lever located on right side below rear hood panel. The clutch system is composed
of the clutch housing, clutch pressure plate, disc ring, clutch release fingers, clutch release bearings and clutch discs.
OPERATION
When both the clutches are engaged, the PTO clutch pressure plate pushes the PTO clutch disc against engine
flywheel and transmission pressure plate pushes the clutch housing by the spring action of dish ring.
The friction between the clutch disc, flywheel and clutch housing transmits the engine power to the transmission drive
shaft and PTO drive shaft independently.
The clutch pedal is connected to the main clutch release bearing by means of mechanical linkage components.
When the clutch pedal is pressed, the clutch release bearing moves forward and discharges the main clutch fingers.
Consequently, the clutch pressure plate backs off and releases the clutch disc from the clutch housing. The transfer
of engine power to the transmission is stopped.
When the clutch pedal is released, the main clutch release bearing disengages the main clutch finger which acts on the
clutch pressure plate and causes the clutch housing, main clutch discs and pressure plates to come in contact. The
flow of power from the engine and transmission is re-established. Similarly PTO clutch is engaged and disengaged
independent of transmission clutch by operating PTO clutch control lever.
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