Good deal, that means you don't have to deal with removing a load of metal trash from the system. On an AC repair site I use, the "Experts" who make their living repairing AC systems, said that on a R12 to R134a conversion, you may under some conditions be better off if you do not flush the system.
The thinking at that time was, that if a compressor has failed and loaded the system with metal trash, you have no choice but to flush the system. The other side of it was that if the compressor is in good shape, the system will be relativly clean. In that case, the interior of the old non barrier hoses are pretty well sealed by years of mineral oil flowing through them, making it much easier to keep R134a in the system, as that old oil impregnated rubber makes a pretty good stopleak. Flushing the system removes some of that old mineral oil from the hoses and can make them more "leaky" when R134a refrigerant is used.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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