Air Compressor Noise Excessive
Cause Corrections
----------
Carbon Buildup Excessive in the Air
Discharge Line, Check Valve, and/or
Cylinder Head
OK
f
To check carbon buildup, refer to Procedure
4-01. To replace air compressor head, refer to
Procedure 4-06. To replace air discharge
line(s), refer to equipment manufacturer.
Check the turbocharger for oil leakage. Refer
to Procedure 3-02.
----------
Unloader Valve Malfunction. Air
Compressor Intake or Exhaust Valve
Leaks
OK
f
Check unloader valve operation. Refer to
Procedure 4-03. Inspect intake and
exhaust valve assemblies. Refer to
Procedure 4-06.
----------
Accessory Drive is Worn (Axial End
Play Out of Specification)
OK
f
Check accessory drive for wear. Refer
to Procedure 7-31.
----------
Splined Drive Coupling Excessively Worn
OK
f
Check coupling for wear. Refer to
Procedure 4-07.
----------
Air Compressor Excessively Worn or
Damaged Internally
OK
f
Replace air compressor. Refer to
Procedure 7-31.
----------
Air Compressor Drive Gear or Engine
Gear Train Worn or Damaged
Inspect condition of gears and repair as
needed. Refer to Procedure 7-31.
SectionT-Troubleshooting Troubleshooting Symptoms Charts
N14 Page T-5
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