[whited44]

Dennis,

First of all thank you for following up and posting what you find. It helps others who may find this thread in the future.

Given the year of your coach, you MAY have a PennTex alternator, and you may have the standard double belt which routes around the AC comp and alternator. Before I go off in the weeds about other potential causes, let’s see what the voltage tests reveal. Could you also post a pic of the back of the engine. It will help us see your alternator setup. Cause Newell made a handful of different setups on the alternator on the Series 60 engine.

Ok so here goes.. 
with it unplugged prior to cranking it up the batteries read 12.5

I fired it up and put it in high idle.  Read the batteries and the alternator they were both around 12.2

The longer I let it run the worse it got until it was around 11.9

At 11.9 I shut it off and plugged it back into shore power and it went to 14.4 and charging quick

I’ve included pics of the alternator. I’d assume that’s what my prob is