This model Stump Grinder is in the prototype stage.  The Stump Grinder is not available for production at this time.  This Stump Grinder is intended to be powered by existing excavator auxillary hydraulic circuit.  For future planning, insure that the excavator has a minimum of 100 HYDRAULIC HORSEPOWER.

HYD. H.P. = G.P.M. x p.s.i. / 1714