Engine Run Solenoid - Toro Workman MDX-D Service Manual

Engine Run Solenoid

The engine run solenoid used on Workman MDX--D
vehicles must be energized for the diesel engine to run.
The run solenoid is mounted to the injection pump on the
engine (Fig. 23). The run solenoid is energized when the
ignition switch is in either the ON or START position.
1
The engine run 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 solenoid pull coil is
energized and the solenoid plunger retracts. Once the
plunger is retracted, the hold coil will keep it retracted for
2
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.
NOTE: A fusible link in the engine wire harness protects
the engine run solenoid pull coil circuit. If this link should
fail, the run solenoid will not function and the engine will
not run. Refer to electrical drawings in Chapter 7 -- Elec-
trical Drawings when troubleshooting the run solenoid.
Figure 23
1. Engine assembly 2. Engine run solenoid
NOTE: See Kubota Workshop Manual, Diesel Engine,
SM--E3B Series for information regarding engine run
solenoid testing procedure.
Workman MDX--D Page 5 - - 17 Electrical System