I am working on my wife's 1989 Audi 100Q (gas engine 5 cyl) and attempting to remove the a/c clutch from the a/c compressor. I removed the nut that is in the center of the clutch and used a a/c compressor clutch puller but it's noy budging. Any suggestions? I don't want to replace the entire a/c compressor because it has no leaks and the R-12 is still in the system. It will cost way too much to convert to 134A and why replace something if I can just replace the clutch. Any help would be appreciated.