Fuel Stop Solenoid (Groundsmaster 3280−D)
The fuel stop solenoid used on the Groundsmaster
3280−D
engine to run. The solenoid is mounted to the injection
pump on the engine (Fig. 30).
(diesel engine) must be energized for the diesel
2
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
from the measured value of the component you are test-
ing.
1
Figure 30
1.
Injection pump
2.
Fuel stop solenoid
1.
2.
pull coil terminal and the other test lead to the fuel stop
solenoid frame (ground) (Fig. 31). The resistance of the
pull coil should be less than 1 ohm (but not zero).
Disconnect wire harness connector from solenoid.
Using a digital multimeter, touch one test lead to the
2
1
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. 31). The resistance of the
hold coil should be approximately 15 ohms.
3
4.
Connect solenoid to the wiring harness.
Figure 31
1.
2.
Fuel stop solenoid
Pull coil terminal
3.
Hold coil terminal
Live testing
1.
Disconnect wire harness connector from solenoid.
NOTE: The solenoid may be removed from the engine
or tested in place.
2.
If the solenoid is removed from the engine, make
sure that the solenoid plunger moves freely and is free
of dirt, debris and corrosion.
NOTE: When testing run solenoid, use test leads with
at least 14 gauge wire.
3.
Connect a positive (+) test lead from a 12 VDC
source to the pull coil and hold coil terminals.
4.
Touch a negative (−) test lead from the 12 VDC
source to the fuel stop solenoid frame (ground) (Fig. 31).
The solenoid should engage, making an audible “click,”
and the plunger should retract.
5.
Remove positive (+) voltage from the pull coil termi-
nal. The solenoid should stay engaged.
6.
Remove positive (+) voltage from the hold coil termi-
nal. The solenoid should release.
7.
Reconnect the wires to the solenoid.
Electrical System
Page 6 − 22
Groundsmaster 3280−D/3320
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