Fuel Stop Solenoid
The fuel stop solenoid used on your Groundsmaster
mustbeenergized forthedieselengine torun.Thesole-
noidismountedtotheinjectionpumpontheengine(Fig.
53).
5. Using a digital multimeter (ohms setting), touch one
test lead to the hold coil terminal and the other test lead
to the fuel stop solenoid frame (ground) (Fig. 54). The
resistance of the hold coil should be approximately 15
ohms.
The TEC controller monitors the operation of the fuel
stop solenoid. The solenoid and its circuit wiring should
be tested as a controller output with the Diagnostic Dis-
play (see Special Tools and Troubleshooting in this
chapter).
6. If either coil resistance is incorrect, replace fuel stop
solenoid.
7.
Connect wire harness connector to the fuel stop so-
lenoid.
If the controller detected a fuel stop solenoid problem
during engine operation, the Diagnostic light can be
used to identify the fault (see Diagnostic Light in the
Troubleshooting section of this chapter).
8.
Lower and secure hood.
Testing
1
1.
Park machine on a level surface, lower cutting
decks, stop engine, apply parking brake and remove
key from ignition switch. Open hood to gain access to
engine.
2
2.
Disconnect wire harness connector from fuel stop
solenoid.
NOTE: The fuel stop solenoid may be removed from
the engine or tested in place.
Figure 53
2.
3.
If the solenoid is removed from the engine, make
1.
Injection pump
Fuel stop solenoid
sure that the solenoid plunger moves freely and is free
of dirt, debris and corrosion.
2
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.
1
3
4.
Using a digital multimeter (ohms setting), touch one
test lead to the pull coil terminal and the other test lead
to the fuel stop solenoid frame (ground) (Fig. 54). The
resistance of the pull coil should be less than 1 ohm (but
not zero).
Figure 54
1.
2.
Fuel stop solenoid
Pull coil terminal
3.
Hold coil terminal
Electrical System
Page 5 -- 42
Groundsmaster 4300--D
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