Abstract: The support framework for supported mounting of a mounting arm of a wing plow blade includes two mirror image sections, one mounted on each side wall of a forward plow frame. Each section includes a substantially squared peripheral lip within which a first and second plate are contiguously seated in side by side manner, each securing the position of the other within the lip. The first plate is rotatable about a hinge to a position outside the lip, allowing the second plate, which is attached to the side wall of the forward plow frame by a pivot, to pivot forwardly and rearwardly within the confines of the lip, allowing for tiltability of a vertical mounting post of the wing plow which is engaged to the second plate by means of the wing plow mounting are extending therethrough.