Fuel Stop Solenoid (Solenoid With 3 Wire Connector)
The fuel stop solenoid must be energized for the engine
to run. It is mounted on the engine block near the injec-
tion pump.
2
1
The fuel stop solenoid includes two coils for operation:
the pull coil and the hold coil. When the ignition switch
isturnedtoSTART,thefuelstopsolenoidisinitiallyener-
gized and the pull coil retracts the solenoid plunger.
Oncetheplungerisretracted,theholdcoilwillkeepitre-
tracted for continued engine operation. When the sole-
noidisde--energized,theplungerextendstoshutofffuel
supply to the engine causing the engine to stop running.
The fuel stop solenoid is grounded through the common
(black) wire of the solenoid wire connector.
Figure 29
NOTE: Refer to Chapter 8 -- Electrical Diagrams when
troubleshooting the fuel stop solenoid.
1.
Injection pump
2.
Fuel stop solenoid
6
Testing
3
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the test leads together. The me-
ter will display a small resistance value (usually 0.5
ohms or less). This resistance is due to the internal re-
sistance of the meter and test leads. Subtract this value
fromthe measured value ofthecomponent you aretest-
ing.
5
4
2
1
1.
connect the connector from the solenoid.
Make sure ignition switch is in the OFF position. Dis-
Figure 30
1.
2.
3.
Cap screw
Fuel stop solenoid
Gasket
4.
5.
6.
Common (Black wire)
Hold coil (Red wire)
Pull coil (White wire)
2.
Using a digital multimeter, touch one test lead to the
pin of the black wire and the other test lead to the pin of
the white wire (Fig. 30). The resistance of the pull coil
should be about 0.33 ohms.
3.
Using a digital multimeter, touch one test lead to the
pin of the black wire and the other test lead to the pin of
the red wire (Fig. 30). The resistance of the hold coil
should be about 12.2 ohms.
4.
Connect solenoid to the wiring harness.
Electrical System (Rev. D)
Page 5 -- 20
Groundsmaster 3500--D
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