[Panelman55]

If it is a steel pulley you can do the old heat and beat method. Take a true flat surface, other than concrete, warm the pulley a little in the bent spot, not enough to cherry the steel and form it back into the proper shape with the hammer. Try to stay away from the holes and edges, if you can. Let the part cool, don't try to cool the part, let it cool on its own so not to change the temper. Check for straightness. I,m a machinist and have formed metal with this method many times with very good results. I also use a flat steel table. It helps.