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Old 07-16-2003, 05:55 PM   #10
a71CustomDeluxe
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Join Date: May 2003
Posts: 8
Re: 134a a/c conversion

I would change all of the hoses. You need to flush the condenser and evaporator. The oil in the compressor needs to be changed to POE. I'd use blue (neoprene) o-rings. You will need a new receiver/drier. If the compressor pulley has been without a belt they sometimes have corrosion which chews up belts. With this setup you can charge with R134a but are still able to go back to R12 if you're unhappy with the R134a performance. For R134a you might also need to adjust the POA/STV. On my truck I use R12.

Richard
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