I have a Sanden 508 that I want to use on my truck with R12. I think they put PAG oil in them from the factory. Do I just simply let the oil oil drain and put mineral oil in through the drain plug on top, and do I need to drain and refill with mineral multiple times to make sure I got it all? I know R12 and PAG will destroy the system.
Best to drain and fill a couple times. I would also flush the rest of the system and replace the drier.
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Drain, refill sump with mineral oil. Inject 20 to 50 cc's of mineral oil into the suction port. Spin the shaft several revolutions. Drain and refill. Repeat.
Compressor flushing procedure
Usually twice is enough, especially on a new compressor.
B.
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~ Mahatma Gandhi, Gandhi, An Autobiography, M. K. Gandhi, page 446.
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