N14 Base Engine Troubleshooting and Repair Manual – Engine Vibration Excessive

Symptom Tree  t075

This is symptom tree t075
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

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


Engine is misfiring

Refer to the Engine Runs Rough or Misfires symptom tree.


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

Verify the correct idle speed setting. Increase the idle speed with INSITE™.


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

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


Fan is loose, damaged, or not balanced

Check the fan. Refer to Procedure 008-040.


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 Procedures 009-001 and 012-014.


Engine mounts are worn, damaged, or not correct

Check the engine mounts. Refer to Procedure 016-010.


Vibration damper is damaged

Inspect the vibration damper. Refer to Procedure 001-052.


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 specifications.


Power take-off (PTO) is damaged

Check the PTO for damage and correct installation. Refer to the manufacturer’s instructions.


Flywheel housing is not aligned correctly

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


Flywheel or flexplate capscrews are loose or broken

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

Last Modified:  05-Jan-2004