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Home > Ordnance Documents and other related manuals > > Troubleshooting Approach - OD166280046
Task 2. Describe the Troubleshooting Procedures for Malfunctions Occuring Within the VArious Systems
Troubleshooting and Repair

Maintenance of the Heavy Expanded Mobility Tactical Truck (HEMTT)
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MAINTENANCE OF THE HEMTT - OD1662 - LESSON 1/TASK 2
2.
Troubleshooting Approach
a.
General.
Troubleshooting is a step-by-step process of finding
the cause of maintenance problems with the M977 series FOL.
It is not possible to cover all troubles and deficiencies that may
occur in a system under the many conditions of operation.
If a
specific malfunction, test or inspection, and corrective action can
not be found, you should proceed to isolate the system in which the
trouble occurs and locate the defective component.  Before taking any
action to troubleshoot or correct a possible malfunction, the rules
cited in paragraph 2b, below, should be followed.
b.
General  Rules  of  Troubleshooting.
The  following  five  rules
should  be  followed  whenever  troubleshooting,  regardless  of  the
equipment.  In other words, follow these rules whether troubleshooting
a tank, truck, weapon, radio, etc.  These rules apply equally to any
and all troubleshooting.
(1) Read the Equipment Inspection and Maintenance Worksheet, DA Form
2404, and question the vehicle operator to obtain any information that
may assist in determining the cause of the maintenance problem.
(2) Never overlook the chance that the maintenance problem could be
of  simple  origin.
The  problem  could  be  corrected  with  minor
adjustment.
(3) Use all senses to observe and locate troubles.
(4) Use  test  instruments
or
gages
to
help
determine
and
isolate
maintenance problems.
(5) Always isolate the system where the malfunction occurs and then
locate the defective component.
c.
Preliminary Troubleshooting Procedures.  The first step-performed
in any troubleshooting operation is to read DA Form 2404 and talk to
the operator.
Once this has been accomplished, the mechanic reads
through  the  troubleshooting  procedures  to  determine  the  necessary
tools and equipment that will be needed to troubleshoot the
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