Komatsu HM400-5 Articulated Dump Truck

January 14, 2015

The 469-horsepower HM400-5 ADT is Tier 4-Final certified with a Komatsu SAA6D140E-7 engine. Payload is 44.1 tons, and gross vehicle weight is 165,633 pounds. Loading height of 10 feet 5 inches matches the truck to 5.5- to 7.5-cubic-yard wheel loaders. Two single-staged body lift cylinders provide a 70-degree dump angle. The company’s traction control system (K-TCS) detects soft ground conditions with speed sensors located on the transmission output shafts, then automatically applies the inter-axle lock that provides power to all three axles. The company’s advanced transmission with optimum modulation control (K-ATOMiCS) is a six-speed automatic that uses an electronic system to eliminate shift shock and torque cutoff. It automatically selects the ideal gear based on vehicle speed, engine rpm, and the chosen shift position, the company says. An integrated payload meter (PLM) displays the loaded material weight on the cab monitor for the truck operator, and indicates payload information to the loader operator via external display lamps.