Abstract: A motorized vehicle carries a telescoping boom, pivotally mounted thereon by its proximal end portion for rotation about a vertical axis and for pivoting about a horizontal axis from a horizontal position to a vertical position. The distal end portion carries a limb engaging and cutting assembly having opposed outwardly diverging guide bars which converge toward a hydraulically driven rotary saw which is movable, along the longitudinal axis of the boom, outwardly to cut the limb as it is held in the throat between the guide bars. A pair of hydraulically operated pivoted grappling hooks confine a limb in the throat for severing action by the saw. The assembly is rotatable about the longitudinal axis by a hydraulic motor. Remote controls in the cab of the vehicle permit selective actuation of the components.