A P.T.O. Bush is a very important piece of equipment for your tractor, as transport power from the tractor to the equipment behind the tractor. Whether people are going to be using a bush hog, a tiller, or any other piece of equipment, the PTO shaft needs to be the correct size. PTO is a device for transferring power from a tractors engine to an implement or machine that lacks an engine. The P.T.O. Bush is very effective and useful.