One thing that works on some of the older machines with the flat belts, if your belt goes south, you can find a later car or pickup "serpentine" belt that's the right length and it will work fine on the flat pulleys, at least on the smaller machines- I haven't seen one big enough for my 16x60, but there's probably some that size too, a lot of the bigger trucks, tractors and construction equipment are coming with serpentines