The spring which is part of the wheel drive assembly broke and I need to remove the wheel drive pulley in order to access it and replace it. There is one nut at the center of the pulley. How do I go about removing it? I was told that an impact wrench is needed, but after "opening up" the front half from the back half, there is nowhere near the room needed to get an impact wrench(even if I had one which I don't) on that nut.