CUMMINS N14 - Engine Noise Excessive*

Engine Noise Excessive* (Continued)
Cause Corrections
----------
Drive Train Noise Excessive
OK
f
Disconnect drive train to isolate.
----------
Gear Train Backlash Excessive or Gear
Teeth Damaged
OK
f
Check gear backlash and gear teeth.
Refer to Procedure 7-39.
----------
Main or Connecting Rod Bearing Problem
OK
f
Refer to ‘‘Engine Noise Excessive -
Connecting Rod or Main Bearing’’
Symptom Chart.
----------
Flywheel/Flexplate Capscrews Loose or
Broken
OK
f
Check flywheel and flywheel mounting
capscrews. Refer to Procedure 7-42.
----------
Piston, Piston Rings, Cylinder Liner
Damaged or Excessively Worn
OK
f
Refer to ‘‘Engine Noise Excessive -
Piston’’ Symptom Chart.
----------
Internal Engine Damaged
OK
f
Use oil analysis and inspect oil filters
for probable cause. Refer to Procedure
2-02.
----------
(REPTO) Rear Engine Power Take-Off
Noise Excessive
Disassemble and repair as necessary.
Refer to the rebuild manual.
* Note: When troubleshooting engine noise problems, make sure the engine accessories (air compressor, fan
clutch, or hydraulic pump) are not the cause of the noise. Refer to Engine Noise Diagnostic Procedures - General
Information symptom chart before using this chart.
Troubleshooting Symptoms Charts SectionT-Troubleshooting
N14Page T-38