Thanks to Frank Folkman for this handout from a GMCMI rally showing an improved valve for the Dana Air Compressor.

Date: Fri, 02 Mar 2001 15:44:43 -0500
From: Wayne Newland <>
Subject: Re: GMC: Compressor head mod

I was at the Marion, NC GMCI Convention. I had an extra Dana pump, and it was the one that was modified and used as the bench comparisson. I think that the tech session to repair the Dana was on the program. The modification, per se might not have been in print, but it was announced. A lot of people took their compressors out of their coaches to do the test. The converted pump is a lot noisier than before, but it works a lot faster.

Wayne Newland F9300 75 Palm Beach Columbia, Md.