"Dave M." wrote: > > In case anyone wants to read the full official R-134a > conversion/retrofit procedure from Mercedes, here's a link to the > factory document (200kb PDF file): > > http://www.w124performance.com/docs/mb/other/134a_retrofit.pdf >
I'm reading the factory procedure for the old York and Harrison compressors you listed above and thinking "what a crock". They attempt to remove the mineral oil by flushing it with your old R12 and pulling a vacuum, put the R134 adapters on, fill with R134+PAG, and that's it. No barrier hoses, no mention of what happens to PAG when you run it through chlorine coated condensor&evaporator. They get points for saying to replace the receiver/dryer, where most of the mineral oil is probably sitting.
