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Best Compressor For R12 In Diesel Pusher

Posted: Fri Jan 04, 2019 9:39 am
by philipswanson
I have a 95 Wanderlodge that I am setting up for R12 from scratch. I am looking for a modern day compressor recommendation that will hold up well under stress with R12 and ester oil.

Re: Best Compressor For R12 In Diesel Pusher

Posted: Sat Jan 05, 2019 1:54 pm
by Dougflas
Sanden SD 507

Re: Best Compressor For R12 In Diesel Pusher

Posted: Sat Jan 12, 2019 8:50 am
by philipswanson
Most 507s are set up for R134. Will one of these work if I just swap out the oil or are there other differences?

Re: Best Compressor For R12 In Diesel Pusher

Posted: Sun Jan 13, 2019 7:45 am
by Cusser
philipswanson wrote:Most 507s are set up for R134. Will one of these work if I just swap out the oil or are there other differences?


The replacement Sanden in my 1988 Mazda truck came with PAG oil in it, I needed R-12 mineral type oil. So I drained out the PAG oil, added about 4 oz. R-12 mineral type oil, turned the compressor at least 10 revolutions, then drained out the R-12 mineral type oil. Then I repeated the R-12 mineral type oil flush and drain.

Then I added the correct amount of R-12 mineral type oil and completed my install.

Re: Best Compressor For R12 In Diesel Pusher

Posted: Mon Jan 14, 2019 5:30 pm
by bohica2xo
Why would you "start from scratch" with R12?

Properly sized components work great with 134a. The cost of the components for a system is really no different for either refrigerant. The cost of R12 vs 134a is significant however.

Re: Best Compressor For R12 In Diesel Pusher

Posted: Tue Jan 15, 2019 6:34 am
by Cusser
Good question bohica, as a 1995 would've been factory R134a, I didn't catch that.