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).
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.
Caterpillar 770G and 772G off-highway trucks have nominal rated payload capacities of 40 and 52 tons, respectively, and use Cat C15 (770G) and C18 (772G) engines, with net power ratings of 477 (770G) and 550 (772G) horsepower.
The new D-Series Unit Rig model integrates a Cat 3516C HD engine and the Cat 240T AC electric drive system with the existing Unit Rig MT4400 to create the MT4400D AC.
With a 55-horsepower engine, the PC78US-10 is able to attain Tier 4-Final emissions standards without a DPF.
Komatsu’s 264-horsepower D85-18 crawler dozer, aimed at large construction operations and small mining customers, features a Komatsu SAA6D125E-7 variable geometry, turbocharged and aftercooled Tier 4-Final-certified engine that the company says burns up to 5 percent less fuel.