Re: Air Cab AC System Rebuild... Need help!
You are right terry, but I don't have a nitrogen tank so I do something else that I am not supposed to do. I purge the system with the refrigerant to push the air out before I close it up to start pulling the vacuum. It all depends on where the service ports are located as to how I do it. I make every effort to expell a minimum amount into the atmosphere.
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'67 GMC 2500, 292, 4spd, AC
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