A crop merging machine includes a trailer frame, a drawbar assembly coupled to an axle, and a header assembly including a frame and a wheel. The merging machine further includes a pick-up assembly coupled to the header frame and a cross-conveyor assembly coupled to the header frame adjacent to the pick-up assembly. The pick-up and cross-conveyor assemblies are configured to cooperate to lift crop materials off the field surface and move the crop materials laterally to discharge onto the field surface to form a windrow. The merging machine includes a suspension assembly disposed between the trailer frame and header assembly, the suspension assembly being coupled to the header assembly and trailer frame and configured to allow the header assembly to pivot, relative to the trailer frame, about a first axis of rotation and to pivot about a second, distinct axis of rotation to follow a contour of the field surface.
