Manual 36541
Solenoid Troubleshooting Guide
Woodward
9
Which approach should be followed?
Both approaches are equally valid and it is generally at the technician’s discretion to
determine the best possible approach to use for each specific situation.
In some instances, one approach may be more practical than the other. For
example, if the solenoid is especially difficult to remove and re-install, it may be
better to investigate all possible engine related causes before removing the solenoid
for bench testing.
At other times, especially from the solenoid manufacturer’s perspective, it may make
more sense to bench test the solenoid first and eliminate it as the source of the
problem before investigating other causes.
Getting Started
Before beginning the actual troubleshooting, complete the following:
1. Identify and learn about the type of engine or application on which the solenoid
is installed (consult with the customer).
2. Identify the type of solenoid being used. Refer to Safety Precautions section.
Refer to Chapter 3 to begin step-by-step testing and troubleshooting.
Identifying Solenoid Type
It is important to correctly identify the type of solenoid unit you have. This can help
during troubleshooting and when communicating with the factory about a problem.
The label on the solenoid contains a model number descriptor and a part number
descriptor. The part number descriptor specifies the type of features the solenoid
has.
Figure 5. Woodward Solenoid Label
