Service Manual

Pump Drive Electric Clutch

An electric clutch is used to engage and drive the spray-

er pump on the Multi Pro. Clutch operation is controlled

y the pump control switch located on the spray console.

The electric clutch is mounted on the pump drive gear-

box output shaft and is coupled to the spray pump. The

clutch engages when current is applied to the clutch.

Testing

1. Locate clutch on pump drive gearbox shaft. Unplug

clutch connector from machine wire harness (Fig. 21).

NOTE: Prior to taking small resistance readings with a

digital multimeter

, short the meter test leads together.

The meter will display a small resistance value (usually

0.5 ohms or less). This resistance is due to the internal

resistance

of the meter and test leads. Subtract this val-

ue from from the measured value of the component you

are testing.

2. Using a multimeter (ohms setting), verify clutch coil

resistance between the two terminals of the connector

Resistance should be 2.45 ohms.

3. If clutch does not engage when voltage is applied or

coil resistance is incorrect, replace clutch.

4. See Pump Drive Electric Clutch in the Service and

Repairs section of Chapter 6 – Spray System if clutch re-

moval is necessary.

Figure 21

1. Electric clutch 2. Clutch connector

Electrical System

Page 5 – 14

Multi Pro 1200/1250