Have a 145 with about 95 hours on it, started breaking belts. I have replaced all the spindels. Still breaken them. I have the 5inch idler pully closest to the left spindel. Spins free, small idler in the very back of the deck spins nice and free..The one on the tensioner has been replaced but still doesnt seem right. Seems to tight. it was not a JD replacment part. Would this be my calpret ? Or do i have other issues ? Please help,thanks !