TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/TASK 1
front surface to prevent interference with other parts.
8.
Mechanical Systems Troubleshooting Procedures
Now that we have an understanding of the various mechanical systems
and their components, let's move on to the troubleshooting procedures
for these systems.
In the following paragraphs, we will cover ten
different
malfunctions
that
may
occur
in
the
vehicle;
two
malfunctions for each of the five major systems will be discussed.
The first system discussed will be the engine.
Throughout the
troubleshooting procedures covered in the following paragraphs, the
reference "the TM" will indicate TM 9-2320-280-20, unless otherwise
stated.
However, before beginning the troubleshooting procedures for the
HMMWV mechanical systems, there are rules and general procedures that
should be covered.
Rule 1.
Question the operator to obtain any information that might
help you determine the cause of the malfunction.
Rule 2.
Never overlook the chance that the problem could be of
simple origin.
The problem could be corrected with a minor
adjustment.
Rule 3.
Use all senses to observe and locate any troubles.
Rule 4.
Use test instruments or gages to help you determine and
isolate the problem.
Rule 5.
Always isolate the system where the malfunction occurs and
then locate the defective component(s).
Rule 6.
Use standard automotive theories and
principles
when
troubleshooting the vehicle(s) and/or system(s)
covered by
this
subcourse.
Rule 7.
After completing the troubleshooting and making the
necessary corrections, verify that the malfunction has been corrected
and that no additional malfunctions exist.
a.
Engine.
In the paragraphs that
follow,
we
will
cover
the
malfunction: ENGINE WILL NOT CRANK.
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