Fuel Stop Solenoid - Toro Reelmaster 3100-D Service Manual

Fuel Stop Solenoid

Testing the Fuel Stop Solenoid (In Place)
Electrical System: Component Testing
g346550
1. Fuel pump
2. Fuel hose (discharge)
The fuel stop solenoid used on the Reelmaster must be energized for the diesel
engine to run. The solenoid is mounted to the injection pump on the engine
(Figure 138).
The fuel stop solenoid includes two coils for operation: the pull coil and the hold
coil. When the key switch is turned to START, the fuel stop solenoid is initially
energized and the pull coil retracts the solenoid plunger. Once the plunger
is retracted, the hold coil will keep it retracted for continued engine operation.
When the solenoid is de-energized, the plunger extends to shut off fuel supply
to the engine causing the engine to stop running. The fuel stop solenoid is
grounded through the solenoid housing.
Note: Before taking the small resistance readings with a digital multimeter, short
the multimeter test leads together. The meter will display a small resistance value
(usually 0.5 ohms or less). This resistance is because of the internal resistance
of the multimeter and test leads. Subtract this value from the measured value of
the component you are testing.
1. Park the machine on a level surface, lower the cutting deck, set the parking
brake, shut off the engine, and remove the key from the key switch.
2. Unlatch the hood and raise it.
3. Locate the fuel stop solenoid on the engine and disconnect the wire harness
connector from the solenoid.
Figure 138
3. Fuel filter
4. Fuel stop solenoid
Page 6–38 Reelmaster ® 3100-D/3105-D
20252SL Rev A