The Groundsmaster 4000-D/4010-D is the strongest most productive 335 cm mower available today. With its Kubota turbo-charged, 58 hp (43 kW), diesel engine you can quickly mow through a variety of cutting conditions. The 4000-D has the rare ability to mow a 0 degree uncut circle without the use of wheel brakes. The 4010-D has all the features of the 4000-D plus a climate-controlled, all-season safety cab.