63 Riv AC flush and vacuum

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On 9/22/2018 at 9:34 AM, Jim Cannon said:

Use new green o-rings on every connection every time.  They are cheap.  Lubricate them lightly with a drop or two of mineral oil as you assemble, to not pinch or tear an o-ring.


If you have not done so already, put some UV dye into the mineral oil. It will help you find any leaks more easily in the future, after you charge the system and run it (won't help now).


Connect both hoses from your manifold gauge set to their corresponding high- and low-pressure taps on the A/C system, and the vacuum pump to the center hose..  Do not leave one hose off of the A/C ports.




Jim, thank you. Understood.


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On 9/1/2018 at 12:16 PM, KongaMan said:

Not if you use an adapter. ;)  But the thing is, you can use R12 fittings with R134a (and vice versa).  The different fittings serve as a deterrent, not as a preventative.  If someone wants to mix refrigerants, there's not much to stop them.

Mr Konga Man, I’ve been reading a training manual published by the US Navy. The Navy manual stated never  mix 134a with zR12. The reason is the 134a damages the R12 o rings and causes leaks.


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