General Information; General Information; Clutch System Operation - Toro Multi Pro 1200 Service Manual

General Information

Clutch System Operation

LOW ENGINE SPEED
LIGHT LOAD
3
7
1. Drive clutch
2. Driven clutch
3. Moveable sheave (drive clutch)
Two Clutch System (Fig. 1)
Power is transferred from the engine to the transaxle
and spray pump by a variable clutch system that con-
sists of two clutches connected by a drive belt. The drive
clutch responds to engine speed and is mounted to the
engine driveshaft. The driven clutch responds to
changes in load from the transaxle and spray pump and
is mounted to the pump drive gearbox input shaft.
Multi Pro 1200/1250
FULL ENGINE SPEED
DECREASING LOAD
4
6
5
8
Figure 1
4. Fixed sheave (drive clutch)
5. Moveable sheave (driven clutch)
6. Spring
Page 7 - - 3
1
FULL ENGINE SPEED
INCREASING LOAD
2
7. Fixed sheave (driven clutch)
8. CVT drive belt
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 drive and
driven clutches and allows the engine to operate at opti-
mum efficiency.
v
Drive Train