An offshoot of the dependable TK track trencher, the 30SG stump grinder features a variant of the same time-tested track drive platform used by the TK series. The 30SG has a hydraulically-driven cutter wheel that is raised and lowered into the stump and then moved from side to side to cut down. The 30SG power options consist of a 31 HP Briggs & Stratton vanguard v-twin or a 26.5 HP Kohler EFI engine. The engine is coupled to two gear pumps: the larger gear pump drives the cutter wheel and the smaller pump works the tilt and swing cylinders. The tracks are driven by independent hydrostatic pumps mounted on the rear of the engine for easy access and simple linkage control. Counterbalance valves on each track drive prevent the track motors from slipping while the cutter wheel is engaged in the cutting process, even while operating on a slope. This unit is designed specifically for the purpose of grinding stumps, it's not a "one-tool-fits-all" piece of equipment..... it is designed for the individual serious about stump removal, professional grade equipment. Barreto Mfg 30SGB 31 HP Tracked Stump Grinder...... This unit can be seen at ACME EQUIPMENT, 3401 Gateway Drive, Grand Forks, ND 58203 Call 701-335-5022 for more information. CONTACT FOR PRICING