Automotive Air Conditioning Information Forum (Archives)

ugmw177 on Thu August 26, 2010 3:50 PM

Is PAG compatible with both r12 and r134a?

HVargas on Thu August 26, 2010 4:29 PM

No only R134a and even then it should only be used in specified vehicles.

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ugmw177 on Thu August 26, 2010 8:26 PM

ok, thanks...i purchased a new compressor to use with my r12 system but the manufacturer ships it preloaded with PAG46...if i want to run r12, is it ok to drain the compressor [sanden SD507] and fill with either esther or mineral or do i need to clean the compressors' resovoir somehow? I know i cannot flush a compressor

TIA

HECAT on Fri August 27, 2010 5:34 AM

compressor flushing procedure

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FLUSHING TECHNICAL PAPER vs2.pdf 

Cussboy on Fri August 27, 2010 3:40 PM

Quote
Originally posted by: ugmw177
ok, thanks...i purchased a new compressor to use with my r12 system but the manufacturer ships it preloaded with PAG46...if i want to run r12, is it ok to drain the compressor [sanden SD507] and fill with either esther or mineral or do i need to clean the compressors' resovoir somehow? I know i cannot flush a compressor
TIA

I had similar situation. The rebuilt compressor for my '88 B2200 truck (from this board sponsor) came pre-loaded with a PAG oil (I tested it at work, infrared spectrophotometer, FTIR). I drained out the PAG oil, filled it with refrigeration mineral oil, rotated the compressor through several cycles, then drained, repeated, then drained again and added the correct amount of mineral oil. This was approximately 2003, and it's still running great (practically every day, Arizona).