[Latitude 28]

Carthan,
First, my apologies for interjecting non-applicable troubleshooting to your situation and confusing the situation.  Double ditto on what Richard said about those push fittings.  You may already know this but another source for DOT air fittings is NAPA.   If you sign up to AITA (America's Independent Truckers Association) NAPA will give you a discount.

Hope things go well with your fix!

Steve