Cleaning your Gusmer D-Gun Part 4 the Brass Felt Assembly. Announcements / Foam Insulation News Posted by Admin on Sep 04, 2006 - 11:54 AM Changing the Gusmer D-Gun Felt occurs after you have removed the valving rod from the D-Gun Body.  You can see the valving rod laying on the table and the nut that holds the brass and the felt in the hand.  Replace the felt and install a new brass washer. This article comes from Canada Foam Insulation   http://www.foam-insulation.ca/ The URL for this story is:   http://www.foam-insulation.ca/modules.php?op=modload&name=News&file=article&sid=21