[ccjohnson]

I was thinking engine compressor.  On the 2 times we have had a problem with the 110 compressor having long & often,  the leak that was causing most of the problem was the air shift module in the transmission.  Not a real major issue to fix.  Newell rebuilt it once & then Stewart & Stevenson put in a new on for us while they were resolving some issues I had with the engine repair job they did.  You could here air "bubbling" when you had your head in the engine compartment when it was very quiet with the coach inside the garage.  The S&S guy did the replacement at our home  in less than half an hr once he had the part in hand.  Both times the repair had the 110 compressor go from running 8-10 minutes every 20-30 minutes to only 2-3 minutes every 3-4 hrs.  Sorry I did not think about this on my first post.