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Chapter 1. GENERAL INFORMATION - TM-9-2815-214-34-10005
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TM-9-2815-214-34-1 Engine Assembly NSN 2815-00-050-8681 Detroit Diesel Model GM3-53 Manual
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Chapter 3. TROUBLESHOOTING INDEX - TM-9-2815-214-34-10007
TM 9-2815-214-34-1
CHAPTER 2
TROUBLESHOOTING APPROACH
2-1. GENERAL APPROACH. This chapter gives you instructions on how to use the troubleshooting material to help you
find and fix the trouble. In every system of the engine there can be faults or problems which will cause certain symptoms.
Symptoms can be such things as unusual noise, vibration, or even complete failure of a system. This volume gives
information for each system on which you can do troubleshooting to find faults and fix them. Before you troubleshoot a
system, you should look at the troubleshooting indexes which will lead you to the information you need to help make your
troubleshooting faster and easier. If you follow the instructions the right way, you will find those troubles you can fix. But,
If you fix something and the trouble is still there, it mean's there is more than one trouble. If this happens, start all over
again to find the other trouble.
2-2. TROUBLESHOOTING INDEX. The troubleshooting index, and instructions on how to use it are in chapter 3. Go to
this index first because it tells you where to find troubleshooting roadmaps, fault symptom indexes, summary
troubleshooting charts and support diagrams for each system.
2-3. TEST EQUIPMENT PROCEDURES INDEX. The test equipment procedures index, and instructions on how to use it
are in chapter 4. This index tells you where to find mechanical tests which you can use to do your troubleshooting. It also
tells you what equipment you will need to do the tests.  If you have a STE/ICE (Simplified Test Equipment/Internal
Combustion Engine) Set (NSN 4910-00-124-2554), you may use it, where applicable, to do your troubleshooting. Refer to
TM 9-4910-571-34&P.
2-4. TROUBLESHOOTING ROADMAPS. Troubleshooting roadmaps for each system are in chapter 5. If the system is
made up of subsystems, these subsystems are also on the roadmap. Under the subsystem is a list of things which are
the most likely causes of a fault symptom in that subsystem. If you have enough skill, you can troubleshoot these things
on the engine without using the detailed troubleshooting procedures. So if you know enough about the engine to work on
your own, use the roadmap for the system with the problem before you check the fault symptom index.
2-5. FAULT SYMPTOM INDEX. Fault symptom indexes and instructions on how to use them are in chapter 6. For each
system of the engine, there is an index which gives you a list of the fault symptoms for that system. The index also tells
you where to find the detailed troubleshooting procedures and what resources (tools/people) you need to do each
procedure.
2-6. SAMPLE TROUBLESHOOTING PROCEDURE. A sample troubleshooting procedure is in chapter 7. This sample
procedure will help you see the way detailed troubleshooting procedures are to be used.
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