Between me and my Son(Ps2cho), we have 9 Vehicles that are or were R12 charged!
After we did the whole A/C system on Ps2cho's 260, and recharged it with virgin R12, I decided that I needed a way to recover it, if we needed to replace a compressor or something.

Last week, I found a Snap-On ACT 3120 locally, and bought it!
It seems well looked after, and the PO assured me that he always serviced it, and tested the Refridgerant before he evacuated.
He also says he always had the "Recycleguard" external filter in place to protect it from Sealants.
He gave me 2 Manchester recovery tanks(50lb?) with it, one he says has maybe 5lb of recovered R12, and one that is empty.

Here she is!






I am going to change the compressor oil, and service it anyway. I have just ordered a 2 replacement RecycleGuard filter elements, and 2 filter/dryer filters for the unit.

Questions:
1/ I want to use the empty tank for "pure R12"..
How do I "clean it" inside... I know I must pull 25" of Vacuum on it, but what if there is oil or gunk inside?

2/ I am told this unit will do r12 or R134a.... I was wondering if its just to much work to swap between them, even if I have seperate tanks etc?

Any advice of comment is welcome!

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2009 Mercedes ML320 Bluetec