I’ve already removed the LPRL (Low Pressure Return Line) and the Low Pressure Switch. I have not removed the line that leads into the cabin, for a very good reason. See all those wires up there? The fuse box has to be removed in order to properly access the final securing fitting, and the battery MUST BE DISCONNECTED!!!!
There are vital wires up there that go to the emissions control systems, starter, computer, etc, and if you accidently short one, you’ll feel it ,as will the vehicle.
After BOTH battery terminals have been disconnected, remove the final fitting, loosen the bolt that is keeping pressure on the black ring surrounding the lower half of the Accumulator, and Remove.
I decided to run water through the old Accumulator (it’s no good anyway) to prove something. My A/C system has been SEALED, but inoperative for the past 8+ years.
Upon running water through the accumulator, the clear water turned BROWN briefly, and little dust and sand particles went down my sink drain. If I had just "Let it be" the damage would have been catastrophic.
Tagged: , 1993 GMC Sierra 2500 , A/C , System , Conversion , Restoration , Accumulator , Drier , Receiver