Work machine with a grading blade attachment having a knock down blade assembly

A work machine with a grading blade attachment, comprising:

• a frame supported by a plurality of ground-engaging units, the ground-engaging units configured to support the frame on a surface;
• a boom assembly coupled to the frame, the boom assembly having a pair of boom arms pivotally coupled to the frame and movable relative to the frame by a pair of boom hydraulic actuators;
• an attachment coupler coupled to a distal portion of the pair of boom arms, the attachment coupler movable relative to the frame by a pair of attachment pitch hydraulic actuators;
• and
• an attachment including
• an upper attachment frame portion and a rear attachment frame portion, the upper attachment frame portion having a frame length extending forward from the rear attachment frame portion;
• a coupler bracket including an attachment interface for coupling the grading blade attachment to the work machine;
• a pivot beam extending transversely to the frame length and coupled to the upper attachment frame portion;
• a left wheel assembly and a right wheel assembly coupled to the pivot beam on opposite sides of the upper attachment frame portion;
• a grading blade extending transversely to the frame length, the grading blade aft of the wheel assemblies and coupled to the rear attachment portion;
• and
• a knock down blade assembly movable coupled to the upper attachment frame portion between an operative position and an inoperative position, the knock down blade assembly including a knock down blade connected to the upper attachment frame portion and positioned fore of the wheel assemblies when in the operative position.