First he wanted me to let it run for a while because he said it sounded like something was rubbing and maybe it was a chipmunk nest which would rub away with time. So I went back to packing up orders with a loud whine in the background. A few minutes later I heard a loud noise. Jim was hitting on the side of the thing. Really banging it. The whine did lessen a bit. Then he hits it again and again and again. With each hit the sound got less until finally it was a regular AC noise.
OK- here is his reasoning. He knew the noise was from rubbing, not lack of oil. He can tell things like that. People call and he listens to the noise of their spinning wheel on the phone and can tell them what to do to make the noise go away.
Then he remembered that in the winter, when all those heavy branches fell, that one 'rested' on the AC unit. That meant that something inside had gotten skewed so he decided that hitting it from the other direction would unskew it. And it did!!!!!!!