Drive Train Operation; Drive Train Operation; Clutch System Operation - Toro Workman GTX Service Manual

Drive Train Operation

Clutch System Operation

LOW ENGINE SPEED
LIGHT LOAD
7
A
3
1. Primary clutch
2. Secondary clutch
3. Moveable sheave (primary 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 primary clutch responds
to engine speed, and is mounted to the engine crank-
shaft. The secondary clutch responds to changes in
load to the rear axle, and is mounted to the transaxle in-
put shaft.
Drive Train
FULL ENGINE SPEED
DECREASING LOAD
5
6
B
8
4
4. Stationary sheave (primary clutch)
5. Moveable sheave (driven clutch)
6. Spring
Page 4 − 4
Figure 1
The two 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 primary
and secondary clutches and allows the engine to oper-
ate at optimum efficiency.
FULL ENGINE SPEED
INCREASING LOAD
2
C
1
7. Stationary sheave (secondary clutch)
8. CVT drive belt
Workman GTX Gasoline
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