Abstract: A motor grader has an ordinary direction of travel, has a forward end and a rearward end as defined by the ordinary direction of travel, and has two opposed sides. At least one set of front wheels is steerably mounted on the opposed sides of the motor grader adjacent the forward end, with one front wheel in each set mounted on each opposed side of the motor grader. At least one front wheel in each set of front wheels is movably mounted to the motor grader and can be selectively positioned such that each front wheel on one side of the motor grader is further away from the rearward end than the other front wheel in that set.

Abstract: A grader attachment is a forward extending triangular truss structure, which extends from a point of pivotal attachment to a tractor to a tandem front wheel support. A blade frame pivotally hangs from the peak of the truss, supporting a cutter blade immediately beneath the truss. The blade frame is capable of both lateral rotation an tilt. Blade positioning provides lateral forces for sliding the blade from side to side, and a rotational force for turning the blade so as to provide for a left or right leading edge cut. The blade describes, as it is moved, a cutting line tangent to a circle of large radius. The blade is supported through a long lever arm, increasing the stability of the blade position. The tractor raises and lowers the blade by tilting the entire truss. The apparatus is steered by the steering wheels of the tractor.