I am thinking aloud. What if he wrap a heater wire around the bottom of the compressor (the kind we normally use on WI freezer drain line), Heat the compressor for an hour, then evacuate would that get rid of moister in P.O. E. oil?
Decide what you want, decide what you are willing to exchange for it. Establish your priorities and go to work." H.L. Hunt
"In order that people may be happy in their work, these three things are needed: They must be fit for it. They must not do too much of it. And they must have a sense of success in it." John uskin