Cummins N14 STC, Celect, Celect Plus – Service Manual Engine Vibration Excessive

Symptom Tree  t075

This is symptom tree
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Section TF in the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084.


Engine is misfiring

Refer to the Engine Runs Rough or Misfires troubleshooting symptom tree in Section TS.


Engine idle speed is set too low (electronically controlled fuel systems)

Verify the correct idle speed setting. Increase the idle speed with INSITE™ electronic service tool.


Engine idle speed is set too low (mechanical fuel systems)

Adjust the fuel pump idle speed. Refer to Procedure 005-029 in Section 5.


Fan is loose, damaged, or not balanced

Check the fan. Refer to Procedure 008-040 in Section 8.


Belt driven accessories are malfunctioning

Inspect and isolate belt driven accessories and check for vibration.


Gear-driven accessories are malfunctioning

Check the hydraulic pump and air compressor. Isolate gear-driven accessories and check for vibration. Refer to Procedure 009-001 in Section 9 and Procedure 012-014 in Section 12.


Engine mounts are worn, damaged, or not correct

Check the engine mounts. Refer to Procedure 016-010 in Section 16.


Vibration damper is damaged

Inspect the vibration damper. Refer to Procedure 001-052 in Section 1.


Drivetrain components are malfunctioning or are not correct

Compare the drivetrain components to the engine and equipment specifications. Isolate the drivetrain components and check for vibrations. Refer to the OEM service manual.


Power take-off (PTO) is damaged

Check the PTO for damage and correct installation. Refer to the OEM service manual.


Flywheel housing is not aligned correctly

Check the flywheel housing alignment. Refer to Procedure 016-006 in Section 16.


Flywheel or flexplate capscrews are loose or broken

Check the flywheel or flexplate and the mounting capscrews. Refer to Procedure 016-005 in Section 16.

Last Modified:  24-Jan-2012