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TM 9-2320-304-14&P
5-3
Direct Support and General Support Maintenance (Cont)
5-6. INTRODUCTION TO TROUBLESHOOTING.
a. How to Begin Troubleshooting.
(1) Determine the symptom or condition that indicates a problem or failure. Troubleshooting is
divided into symptoms peculiar to the LHS or component: for example, hook arm or main frame.
Refer to the Load Handling System Fault Index (Table 5-1).
(2) Go to the referenced page to begin troubleshooting.
(3) Follow the Diagnostic Procedure.
(4) Observe warnings, cautions, and notes. The formatting and symbols used in this manual for
warnings, cautions, and notes are as follows:
WARNING
This is the symbol for a warning statement. WARNINGs describe a situation which could
cause severe injury or death to personnel.
CAUTION
This is the symbol for a caution statement. CAUTIONs describe a situation which could
cause damage to equipment.
NOTE
This is the symbol for a note. Notes are located directly above the test to which they refer.
Notes provide additional information for performing a test.
b. Abbreviations and Commonly Used Terms.
(1) CKT - Circuit.
(2) COM - Common.
(3) Diagnostics - Troubleshooting by following an exact procedure.
(4) Erratic - Intermittent.
(5) System - A collection of devices which all are related to each other because they depend on each
other to do some function or job. For example, the function of the fuel system is to inject fuel
into the cylinders at the correct time in the correct amount and with the correct quantity. The
collection of devices that are required to do this include the fuel pump, fuel lines, lift pump, fuel
filter, and injectors.
(6) Test Chain - A series of tests to be followed in a particular order or sequence (numbered).
(7) Troubleshooting - The process of making measurements and observing the operation of the
truck to find out if and where any problems exist.
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