Abstract: A rotary harrow blade assembly for a cultivator of the type including a drawbar for attachment to a towing vehicle, a pair of swing booms pivotally connected to the outer ends of the drawbar, and a plurality of skeletal frames extending rearwardly from the drawbar and booms for carrying packers, the assembly including tracks mounted on the packer frames, an elongated wheel frame suspended from the tracks and being movable therealong for changing the angle of inclination of the wheel frame with respect to the longitudinal axes of the drawbar and booms, and a plurality of toothed wheels mounted in the frame.

Abstract: In general, the remote control of a caster wheel assembly on a farm implement such as a crop sprayer of the type including a boom rotatable between a transport position and a field position is a complicated operation. In the transport position, the wheel assembly should be fixed, i.e. non-castering and in the field position the wheel assembly should caster freely. A relatively simple apparatus for effecting caster wheel assembly control includes a frame mounted on the boom, a hydraulic cylinder on the frame, and a linkage connected to the piston rod of the cylinder and releasably connected to an arm on the shaft carrying the wheel assembly, whereby initial extension of the piston rod moves the wheel assembly to a turning position, full piston rod extension causes release and thus free castering of the wheel assembly in the field position, and retraction of the piston rod causes re-engagement of the wheel assembly by the linkage to lock the wheel assembly in the transport position.