By Katie Weiler, Managing Editor | September 28, 2010

Sennebogen 821 Series material-handler excavator821 Series is available as a wheeled model (821M) or a crawler model (821R). Operating weights are 54,000 and 51,600 pounds, respectively. According to Sennebogen, the models are "equipped with one large hydraulic axial-piston pump and a 'computer-free,' load-sensing hydraulic system."