Greaseable hinge for a snow wing

A coupling system for rotatably coupling a moldboard of a snow wing assembly, comprising:

• the moldboard having a curved surface and a first plate disposed on a backside of the curved surface;
• a linkage assembly for attaching the snow wing assembly to a motor grader, the linkage assembly configured to raise or lower the moldboard;
• a hinge for rotatably coupling the moldboard to the linkage assembly to enable the moldboard to rotate in a first rotational direction, the hinge including a second plate having a first face and a second face, wherein the second plate is configured to mate with the first plate of the moldboard;
• and wherein the second plate includes a first passageway extending between the first face and the second face to facilitate lubricant being supplied to a first interface between the first plate and the second plate;
• and
• a pin extending through the moldboard, the first plate, and the second plate at a distance away from the first passageway to rotatably couple the moldboard with the hinge, wherein the pin enables the moldboard to rotate in a second rotational direction about a rotational axis defined by a body of the pin, and wherein the body of the pin includes a second passageway extending from a bottom portion of the pin to an outer surface of the pin.

A motor grader, comprising:

• a snow wing assembly including a moldboard, the moldboard including a curved surface, a first plate disposed proximate to a backside of the curved surface, and an aperture;
• a linkage assembly configured to link the snow wing assembly to an undercarriage assembly of the motor grader;
• a hinge for rotatably coupling the moldboard to the linkage assembly, the hinge including a second plate having a first face and a second face, wherein the second face of the second plate is configured to mate with a surface of the first plate of the moldboard, and wherein the second plate includes a first grease passageway extending between the first face and the second face of the second plate to facilitate grease being supplied to a first interface between the first plate and the second plate;
• and
• a pin extending through the aperture of the moldboard, the first plate, and the second plate at a distance away from the first grease passageway to rotatably couple the moldboard with the hinge, wherein the pin enables the moldboard to rotate in a first rotational direction about a rotational axis defined by a cylindrical body of the pin.