Four-wheel drive tractor

A four-wheel drive tractor comprising a chassis including a front frame and rear frame, a drawbar for applying a draft load, means pivotally connecting said drawbar to and carrying the draft load on said front frame of said chassis, an engine supported on the front frame of said chassis, an axle pivotally supporting the front frame of said chassis, front steerable drive wheels rotatably supporting said front axle and pivotal relative to said front axle for front-end steering, front wheel steering mechanism for steering the front wheels, a rear axle supporting said rear frame of said chassis, a pair of rear drive wheels rotatably supporting said rear axle, an articulating joint including vertically spaced pivotal bearings pivotally connecting said front frame which said rear frame of said chassis, an articulating steering mechanism for articulation of said front and rear frames, front wheel manual steering control means for steering said front wheels through said front wheel steering mechanism and rear wheel manual steering control means for steering said rear wheels of said tractor through said articulating steering mechanism, said front frame and said rear frame defining lenght ratios of approximately 3 to 1 with lengths from the center line of the articulating joint to the center line of the front axle relative to the center line of the articulating joint to the center line of the rear axle, means defining an operator station on said front frame of said chassis for operating said tractor.