A pair of inner plates which are mounted to a coulter wheel by a hub bolted to the two inner plates in one end, and a bearing on an opposing end. A pair of outer plates retains the inner plates and coulter wheel while provide attachment means for a hydraulic cylinder. A hydraulic cylinder is mounted between two tabs located on outer plates and between the inner plates adjacent to the pivot bearing and opposite the coulter wheel. The hydraulic cylinder is connected to a accumulator which provides for a static down pressure. Upon impact with an obstacle, the force pushing up on the coulter wheel overcomes that of the downward static pressure and the hydraulic cylinder retracts allowing the coulter wheel to move in response to the impact force. Trash wheels are bolted to the outer plates parallel to the coulter wheel or at any desired angle.
