Section III. TROUBLESHOOTING
Information in this section is for use of support maintenance personnel in conjunction with, and as a
supplement to, troubleshooting procedures in TM 9-2320-280-20 and TM 9-2320-280-34.
2-7. ENGINE TROUBLESHOOTING
Operation of a deadlined engine without preliminary inspection
will cause further damage.
Information to be used for troubleshooting the engine is contained in TM 9-2320-280-20 and
a. Excessive oil consumption is generally caused by leaky gaskets or loose line connections.
b. Always check the easiest and most obvious things first. This simple rule saves time and trouble.
c. Double check before disassembly. The source of most engine problems can be traced to more than one
part in a system. For example:
(1) Excessive fuel consumption may not be caused by the fuel pump alone. Instead, the trouble could
be a clogged air cleaner, or a restricted exhaust passage causing severe back pressure.
(2) Engines very often are disassembled in search of a complaint and the real evidence of the problem
is destroyed. Check again to be sure an easier solution to the problem has not been overlooked.
d. Before correcting a problem, diagnose the cause of the problem. Do not allow the same failure to