I've got a few used hydro pumps I have accumulated over the years. These pumps both came off the same mower, and have the same hours on them. The same goes for the wheel motors. The wheel motors are still bolted to the hub, and the frame bracket. The hubs are also the same size as alot of w/b's. They are all in working order and will bolt right up to a lot of Scag, Exmark, and Toro walk behinds.