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The Caterpillar H55Ds hydraulic hammer features a simplified design that reduces the number of parts by almost half when compared to the previous model, the H50s. Additionally, the hammer features a higher blow rate and 25 percent more power for superior production from a 436-pound work tool. The energy class for the H55Ds is 500 foot-pound (678 J). The H55Ds is sized for use with all Cat skid steer and multi-terrain loaders, as well as the 302.5, 303.5 and 303 CR compact hydraulic excavators. Recommended carrier weight is 5,500 to 9,900 pounds. The new hammer is compatible with the Caterpillar pin grabber quick coupler system. For expanded versatility, the H55Ds can be equipped with a chisel, moil, spade or compacting plate.