Generator mep-804b voltage problems

[Xcellconstruction]

Hello, I am new to this site but I have had this generator for 3 years. It has always been a great generator for my job sites but I now have a problem. I started it up one day last week, it worked fine for about 10 minutes and suddenly shut down with the over voltage light on. I started it up again and the low voltage light came on and the gauges went to zero. I later found that the Ktk-3 fuse next to the voltage regulator had blown. I figured it must be a bad vr so I replaced it. When I fired it up and again after I installed the vr and a new fuse the engine struggled to run and the over voltage light came back on and once again blew the fuse. I am now scratching my head knowing it’s probably not the voltage regulator. Any help would be appreciated. Thanks

 

[kloppk]

Have you downloaded the TM and performed the VR tests? If so what were the results?

 

[Xcellconstruction]

Have you downloaded the TM and performed the VR tests? If so what were the results?

I downloaded this TM but I can’t find anywhere in there how to test the VR is there another manual I should look for? I kinda ruled out the VR as a problem because the same thing happened with two different ones now. But I guess anything is possible. Thanks for the input.

 

[kloppk]

It's not in that manual.
You'll need to download TM 9-6115-643-24. It's available in the TM section of the forum.
In here Generator TM's

 

[Xcellconstruction]

It's not in that manual.
You'll need to download TM 9-6115-643-24. It's available in the TM section of the forum.
In here Generator TM's

This manual looks like the one I need. I don’t have time to look into today but I will soon. I did notice that this is the manual for mep 804a and I have the mep 804b. Do you think that matters for the problem I’m having?

 

[kloppk]

The VR testing sections "should" be the same.
Major different between the A & B is which engine it has.