Re: a/c compressor problem?? - Saab 900 Bulletin Board - Saabnet.com
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Re: a/c compressor problem??
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Posted by MS (more from MS) on Mon, 12 Aug 2002 18:04:51 Share Post by Email
In Reply to: a/c compressor problem??, walter, Sun, 11 Aug 2002 22:25:04
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I've successfully converted my previous R12 to R134a some months ago. I followed the recommended proceedure of flushing the entire system of the old oil and drying the system out prior to drawing a vacuum. The R12 oil is not compatible with R134a. I removed and flushed each component (accept the reciever/drier) with mineral spirits, then blew compressed air through each component. Then when assembled, I rigged a shop-vac hose to an open hose and drew warm dry air through the system for a good 30 minutes, removing both moisture as well as the remnant mineral spirits fumes. Then the vacuum and final installation of R134 oil and refrigerant. I also put in a used compressor, it too flushed of the old oil. The system has worked fine since. Nice and cool, despite the 100+ temps we've had of late.

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