Re: No AC belt, stress on the main pulley?
It's probably related to RPM.
Figure out which one is squeeling and replace it. Or just find the one that is glazed and replace that one. If it has an air pump then that's probably the culprit.
As far as AC goes, as long as the clutch doesn't engage it shouldn't be a problem. However, just buy a belt (or belts) designed to not have AC. It doesn't stress anything any more than before, otherwise what about all those vehicles that don't have AC and still have the same basic belt system? It's actually less stress since there is no rotating mass nor any belt being stuck in a groove and pulled back out.