TM 5-4310-372-14
Section IV. TROUBLESHOOTING
4-10. INTRODUCTION. The following troubleshooting procedures are to be performed by organizational personnel.
4-11. GENERAL. To aid in troubleshooting, the following general information is listed.
a.
Dirt and water are the major enemies of the fuel system. If you regularly clean the strainer at the outlet of the
fuel line you can stop the dirt and water from getting into the engine’s carburetor where they can do harm.
b. The compressor drive is a fairly simple system. The main problems are improper belt tension, misalignment
and loose parts.
c.
The intake and exhaust valves are the most sensitive and critical parts of the compressor. Loss of pumping
efficiency can most often be traced back to the valves. However, problems with getting enough air are not al-
ways caused by the compressor. Leaky fittings or an improperly adjusted unloader valve may also beat fault.
d. The engine provides the power to rotate the compressor. Poor engine performance will result in reduced air
output. Troubleshooting for internal engine problems is covered in TM 9-2805-262-14. Improper engine
speed control (governor) will directly affect the capacity of the air compressor.
e.
The most common problem with the air receiver and discharge system is air leakage. You can find leaks by
applying soapy water in the area of the suspected leak. If the leak can not be stopped by tightening fittings
replace the part. Use sealing tape on pipe fittings to get a good seal. Do not use sealing tape on hose fittings
which are self–sealing.
4-12. TROUBLESHOOTING CHART
l
Malfunction. Malfunctions listed are the ones most likely to happen. Not all possible malfunctions can be foreseen
and listed.
l
Test or Inspection. Tests or inspections are listed to help you find the cause of the malfunction. The tests are
grouped by what system they belong to (e.g., the fuel system tests are with the fuel system). Within each group
the tests are arranged so that the easier tests come before the harder tests.
Change 3 4-7
