Fuel Stop Solenoid - Toro Groundsmaster 360 Service Manual

Fuel Stop Solenoid

The fuel stop solenoid used on the Groundsmaster 360
must be energized for the diesel engine to run. The sole-
noid is mounted to the injection pump on the engine (Fig.
72).
The fuel stop solenoid includes two (2) coils for opera-
tion: the pull coil and the hold coil. When the ignition
switch is turned to START, the fuel stop solenoid is initial-
ly energized and the pull coil retracts the solenoid plun-
ger. 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.
On 2WD machines, the Standard Control Module run
output LED will be illuminated when the fuel stop sole-
noid hold coil is energized.
NOTE: Refer to electrical drawings in Chapter 9 -- Fol-
dout Drawings when troubleshooting the fuel stop sole-
noid.
In Place Testing
1. Park machine on a level surface, lower cutting deck,
stop engine and engage parking brake. Remove key
from ignition switch. Raise and support hood.
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 solenoid being testing.
1. Make sure ignition switch is in the OFF position. Dis-
connect wire harness connector from fuel stop solenoid.
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. 73). 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. 73). The resistance of the
hold coil should be approximately 15 ohms.
4. If resistance of either coil is incorrect, replace fuel
stop solenoid.
5. Connect wire harness connector to fuel stop sole-
noid.
6. Lower and secure hood.
Groundsmaster 360
1. Fuel stop solenoid
1
1. Fuel stop solenoid
2. Pull coil terminal
Page 5 - - 53
2
1
Figure 72
2. Harness connector
Figure 73
3. Hold coil terminal
Electrical System
2
3