Multiquip HHXG5 operation manual How It Works Figure, Springs High Engine RPM Driven Pulley

mAINTENANCE (old style clutch)

			MOVEABLE FACE
			IS CONTROLLED
	CENTRIFUGAL FORCE		BY A SPRING
			AND BELT TENSION
DISTANCE	DRIVE	LOW OUTPUT
			SPEED
MOVEABLE	PULLEY
FACE
TRAVELS
	LOW ENGINE RPM
		DRIVEN PULLEY
MOVABLE FACE IS			HIGH OUTPUT
CONTROLLED BY		DRIVE	SPEED
ROLLER WEIGHT ARMS		PULLEY

AND SPRINGS

HIGH ENGINE RPM

DRIVEN PULLEY

Figure 24. Pulley Interaction

The "Variable Pitch Pulleys" have one fixed face, and one moveable face.The drive pulley moveable face is controlled by roller weight arms and springs, which change position according to engine speed. The driven pulley moveable face is controlled by a spring and belt tension. (Figure 25)

DRIVE PULLEY

RAMP

PLATE

BUSHING

SPRING

ROLLER ARM

WEIGHT

Figure 25. Variable Pitch Pulley

How It Works (Figure 25)

„„Condition A:

•Engine Idling

•Drive Pulley: Small

•Driven Pulley: Large

•Belt: Loose and Stationary

„„Condition B:

•Engine Accelerating

•Drive Pulley: Small But Increasing

•Driven Pulley: Large But Decreasing

•Belt: Approaching Tightness

„„Condition C:

•Engine At High Speed

•Drive Pulley: Large

•Driven Pulley: Small

•Belt: Tight

A B C

1

2

3 4 5

Figure 26. Pulley Conditions

page 32 — HHXg5 RIDE-ON TROWEL • operation manual — rev. #1 (10/25/10)