Intermittent Squealing Sound, 9200i, 2005 Cummins ISX Engine

Hello Everyone,
I am a new member. Thanks for the opportunity to post a question.
My brother has a 9200i, 2005 Cummins ISX Engine ( International ). It has an intermittent squealing sound. When the problem starts to occur, a faint "bearing like" metallic shrill squeal begins during normal cruise. At this point, acceleration will result in an increasingly loud intensity of the noise. The problem ceases when releasing the throttle. Every time, without fail, when this problem occurs, the voltmeter ceases to indicate it's typical 13.5 V, immediately dropping to 12V. He has changed the main belt , which also drives the alternator as well as the associated belt tensioner. There was no change. His diesel tech changed the charged air cooler. Still, there was no change. Any ideas, suggestions or comments are much appreciated.

Thanks for any help ! My brother & I appreciate your thoughts.

Franklin Thomas

Savannah, Georgia

thomastv@bellsouth.net

912-354-7003

 

Thanks for your reply.

When we solve the problem or have more information accordingly, we will gladly post our findings.

Thanks Again,

Franklin Thomas

 

Thanks for the info

 

Hello Again Fellow Members !

My brother & I very much appreciate your responses as you share your valuable knowledge & experiences. We will keep records as we continue through the troubleshooting process. When we find worthy information, we will share the details accordingly.

Thanks Again,
Franklin Thomas
Savannah, Ga.