Service Manual

General Information

Clutch System Operation

LOW ENGINE SPEED

LIGHT LOAD

DECREASING LOAD

INCREASING LOAD

FULL ENGINE SPEED

Figure 3

1. Drive clutch 4. Fixed sheave (drive clutch) 7. Ramp (fixed cam)

2. Driven clutch 5.

Moveable sheave (driven clutch) 8. Spring

3. Moveable sheave (drive clutch) 6. Button 9.

Fixed sheave (driven clutch)

Two Clutch System (Fig. 3)

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 gearbox input shaft.

Both clutches work together as a matched unit. The

units automatically up–shift and back–shift with

changes in load and speed. This shifting changes the

turning ratio between the drive and driven clutches and

allows

the engine to operate at optimum efficiency.

Multi Pro 1200/1250 Page 7 – 3 Drive T

rain

Drive Train