Komatsu 860E-1K electric drive, rigid-frame dump truck

A new size for Komatsu’s mining-truck line, the 860E-1K electric drive, rigid-frame dump truck features a nominal payload of 254 metric tons (280 short tons). It is powered by a 2,700-horsepower Komatsu 16-cylinder, two-stage turbocharged diesel. The truck can be equipped with a factory-installed trolley-capable option to be used on either 1,600 or 1,800 volt lines. According to the company, this allows the 860E to propel uphill faster while the engine rpm decreases, thereby saving fuel and extending engine life compared to non-trolley. In both applications, the drive system provides a maximum speed of 40 mph with a 35.52:1 final gear ratio powered by a new Siemens control package. In addition, its dynamic retarding system, capable of 4,650 horsepower, is assisted by four-wheel wet-disc brakes.