Fuel Stop Solenoid (Solenoid With 2 Wire Connector)
The fuel stop solenoid used on the Groundsmaster
3505--D
Thesolenoidismountedtotheinjectionpumpontheen-
gine (Fig. 31).
must be energized for the diesel engine to run.
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 solenoid
housing.
2
Figure 31
1.
Fuel stop solenoid
2.
Harness connector
NOTE: Refer to Chapter 8 -- Electrical Diagrams when
troubleshooting the fuel stop solenoid.
2
1
In Place Testing
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.
3
Figure 32
1.
connectwireharness connector fromfuelstopsolenoid.
Make sure ignition switch is in the OFF position. Dis-
1.
2.
Fuel stop solenoid
Pull coil terminal
3.
Hold coil terminal
2.
Using a digital multimeter, touch one test lead to the
pull coil terminal and the other test lead to the fuel stop
solenoid frame (ground) (Fig. 32). The resistance of the
pull coil should be less than 1 ohm (but not zero).
3.
Using a digital multimeter, touch one test lead to the
hold coil terminal and the other test lead to the fuel stop
solenoid frame (ground) (Fig. 32). The resistance of the
hold coil should be approximately 15 ohms.
4.
Connect solenoid to the wiring harness.
Groundsmaster 3500--D
Page 5 -- 21
Electrical System (Rev. D)
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