Second in a new generation of wheeled excavators is the EW160B. Weighing 17.5 tons, the machine offers a variety of booms, complete with a wide range of dipper arm lengths and attachments. It has a maximum digging depth of 20 feet 8 inches, digging reach of 31 feet 10 inches, and dump height of 25 feet 3 inches. It is powered by a 138-hp Volvo D6D six-cylinder engine. Volvo says the unit's hydraulic system pumps oil to the functions only when it is needed.