My 280S's both have York's that I sourced abroad. Found the viscos as well, new in the box, but my mechanic tells me that the airco-refurbishing companies here will not have the parts required for an overhaul.
I tried everything and everywhere, but have been unable to find a source for these, at least none that bothered to mail me back.
I can't believe there are no repair kits for these USA-made compressors.
Hard data would be greatly appreciated!