B5.9G, B5.9LPG, B Gas Plus, B LPG Plus – Engine Vibration Excessive

Symptom Tree  

Engine is misfiring

Refer to the Engine Runs Rough or Misfires symptom tree.


Engine mounts are worn, damaged, or not correct

Check the engine mounts. Refer to the OEM service manual.


Fan is loose, damaged, or not balanced

Check the fan. Refer to Procedure 008-040 (Fan, Cooling) in Section 3.


Alternator is malfunctioning

Temporarily disconnect the alternator and run the engine. Replace the alternator if necessary. Refer to the OEM service manual.


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.

Contact a Cummins Authorized Repair Facility

Last Modified:  15-Feb-2005