Alternator removed and all brackets carefully inspected. Observation is that the way the Interav set up is designed leads to inherent flexibility. To clarify, the original generator U-Channel remains and the Inverav brackets are mounted to that, then the big anodized bar bolts to that. The installation also does not use a lower support bracket as depicted in the Cessna alternator install as well as the original generator install. The Interav pulley is also clearly too big for the TCM belt. They make a 3/8 pulley but it is speced for a Lycoming install so I fear offset may be wrong. I have a Gates belt that fits the alternator pulley nicely but is a bit to tall for the engine pulley. Cessna belt coming today. With alternator in hand, the pulley spins freely with no noise or grinding. Also held pulley and spun body. I have to imagine that if bearings were heating and siezing there would have to be some noticeable noise or roughness. That said, I did try to get bearings from QAA (took over Interav line) but they won't sell them. What happened to Auto Electric shops anyway? So best of three belts is going on...if it happens again, I am going to replace the Interav set up with a Plane Power conversion. Their mount replaces the generator mount (instead of piggybacking on it), uses an upper and lower support backet and uses a 3/8 inch pulley. Not to mention a simplified electrical set up. Interesting side note, after speaking with TCM rep, found out that many of the original installs have what is called a "KISS" pin. A horizontal pin attached to the tensioner bracket that sits just above the belt to prevent the belt from oscillating. I don't have that pin.
