Abstract: A snow plow assembly has a frame with a rear portion adapted for attachment to a motor vehicle and a blade assembly adapted for rotation about a vertical axis with respect to the front portion of the frame. Two ends of a chain are attached to the blade assembly on either side of the vertical axis. The middle section of the chain can slide in a track (e.g. an arcuate tube) attached to the frame. The yaw angle of the blade is adjustably controlled by sliding the chain with respect to the track. Means are also provided for adjustably securing the chain to the track after the desired angle for the blade has been obtained. In addition, the blade assembly can include means for permitting rotation of said blade about a horizontal axis. In this embodiment, two lever arms extend upward from the blade assembly on opposite sides of the vertical axis. The upper end of each lever arm is attached to one end of the chain.