Fuel Stop (Etr) Solenoid - Toro Workman 3000 Series Service Manual

Fuel Stop (ETR) Solenoid

The Workman 3300-D/4300-D has an energize-to-run
(ETR) fuel stop solenoid. The solenoid will stop injector
pump fuel delivery with any electrical failure in the RUN
circuit.
1. Disconnect the wire connector and remove the fuel
stop solenoid from the engine.
2. Connect a 12 volt battery so the positive (+) battery
terminal is connected to terminals A (hold) and B (pull)
(Fig. 22). Connect the negative (–) battery terminal to
solenoid terminal C (common). The plunger should
retract to the dimension shown.
IMPORTANT: Do not connect Voltage to terminal B
(pull) for more than 30 seconds or damage to the
solenoid coil could result.
3. With the battery connected the same as step 2,
disconnect the battery from solenoid terminal B (pull).
The plunger should remain pulled in.
4. Disconnect the battery from terminal A (hold). The
plunger should return to the extended position.
5. Check the solenoid internal spring tension. The spring
must have 9.2 lbs (4.2 kg) minimum force with the
plunger in the extended position.
Replace the fuel stop solenoid if it fails any of the above
tests (See Replacing and/or Adjusting Stop Solenoid).
To Test While Connected to Wire Harness
1. Remove the governor tie rod cover so you can
observe the solenoid plunger.
2. Hold the manual fuel stop lever back to prevent fuel
delivery. Turn the key switch to the START position and
quickly return it to the ON position. The solenoid plunger
should be retracted.
3. Turn the key switch to the OFF position. The solenoid
plunger should extend.
NOTE: You can also test operation without removing the
governor tie rod cover. Listen for an audible "click" as
the solenoid extends and retracts while doing steps 2
and 3 of the above procedure. This will not show if the
solenoid is adjusted correctly or if it is fully extending
and retracting. (See Replacing and/or Adjusting the
Stop Solenoid in the External Engine Component Re­
pair section.)
Workman 3300-D/4300-D
1
+
12 V.D.C
Page 4 - 25 Rev. B
3
2
Figure 24
1. Fuel stop (ETR) solenoid
2. Wire connector
3. Governor tie rod cover
Energized
0.12 in.
(3 mm)
A
B
C
0.65 in.
(16.5 mm)
De-energized
—
Figure 25
A. Hold
B. Pull
C. Common (ground)
Liquid Cooled Diesel Engine