This is a highly detailed 3D model of a PTO (Power Total Output) used to give power from a heavy diesel engine to a vehicle attached machine. Examples of use may vary among water pumps for firefighter vehicles, hydraulic arms over a truck chassis, trash compactors, etcetera. It is mounted between the engine and the gearbox in a heavy-duty vehicle. This model is a Parker Chelsea type with eight holes mounting. This particular model contains 39 parts.