Abstract: In a combine header having a rotatable crop reel, a hydraulic cylinder is carried on each of the reel support arms for adjusting the fore and aft position of the reel. The cylinders are serially connected and comprise a phasing circuit wherein the cylinders have paired fluid inlets and flow-restricting orifices, and the piston is positionable between the inlet and orifice of a pair in either full-strode position. A check valve is operationally associated with each orifice to prevent loss of fluid acting on the piston when being moved from either full-stroke position.