Clutch System Operation - Toro Workman MDX-D Service Manual

Drive Train Operation

Clutch System Operation

LOW ENGINE SPEED
LIGHT LOAD
3
7
1. Drive clutch
2. Driven clutch
3. Moveable sheave (drive clutch)
Power is transferred from the engine to the transaxle by
a variable clutch system that consists of two (2) clutches
connected by a drive belt. The drive clutch responds to
engine speed and is mounted to the engine crankshaft.
The driven clutch responds to changes in load to the rear
axle and is mounted to the transaxle input shaft.
Drive Train
FULL ENGINE SPEED
DECREASING LOAD
4
6
5
8
4. Fixed sheave (drive clutch)
5. Moveable sheave (driven clutch)
6. Spring
1
Figure 1
The two (2) clutches work together to automatically up--
shift and back--shift as changes in load and speed occur.
This shifting changes the turning ratio between the drive
and driven clutches and allows the engine to operate at
optimum efficiency.
Page 4 - - 4
FULL ENGINE SPEED
INCREASING LOAD
2
7. Fixed sheave (driven clutch)
8. CVT drive belt
Workman MDX--D
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