Abstract: A circuit for controlling pitch and tilt of a dozer blade in which two cylinders are connected between the dozer blade and the dozer push arms. One cylinder only is extended and retracted to achieve tilt, and both cylinders are operated in unison to achieve pitch with divider valves assuring that equal volumes of hydraulic fluid reach each cylinder and are expelled from each cylinder. Extension and retraction is selectively determined by a directional control valve, while a selector valve determines whether both cylinders or only one cylinder is connected with the directional control valve.

Abstract: An earth moving machine having an improved mounting for a scraping blade attached thereto. The scraping blade of the machine herein disclosed is capable of undergoing independent or simultaneous rotational movement about three perpendicular axes and applying high forces to material to be moved. Movement about two of these axes is controlled by two separate pairs of hydraulic cylinders. A hydraulic actuator effects movement of the blade about a third axis and acts to transmit a part of the force applied to the blade during operation to the frame of the machine.