I've had the machine several years - 3-4, maybe. It was noisy at first, but has sewn well for all that time - it is an excellent piecer. I can't remember if I put that belt on - I don't think so. I think the only belt I replaced was on the Admiral. The MW sewed Tuesday, but not today. It is not a machine that has been out of use. I doubt if I can get it apart - aging hands, but if it doesn't sew tomorrow, I'll put it aside and use my back up 301. My regular 301 is FMQ right now. The Elna, which can't piece, is sewing leather trim on a wool coat. Busy machines. I will try a few things you've suggested, but if I can't do anything, my son will be here in a month or so. I will order a bigger belt so it's here for him.