Komatsu America’s new HM300-3 articulated truck is rated at 325 hp (242 kW) from a Komatsu SAA6D125E-6 diesel that is EPA Tier 4 Interim and EU Stage 3B emission certified.   The HM300-3 features a maximum gross vehicle weight of 115,147 lb (52,230 kg) and can haul up to a 31-ton (28.1-metric ton) payload at maximum speed of 36.4 mph (58.6 kph).  The HM300-3 is equipped with KOMTRAX technology, which sends machine operating information to a secure website via wireless technology. Data such as daily fuel consumption, machine utilization, operating hours, location, cautions and maintenance alerts are relayed to the Web application for analysis.

The HM300-3 features Komatsu’s Traction Control System (K-TCS) which automatically provides optimum traction when operating in soft ground conditions. Komatsu’s Advanced Transmission with Optimum Modulation Control System (K-ATOMiCS) includes a six-speed, fully automatic transmission with advanced electronics to eliminate shift shock and torque cutoff. It automatically selects the right gear based on vehicle speed, engine rpm and the shift position chosen. According to Komatsu, body design optimization enables the HM300-3 to provide increased capacity and payload.  Its 9 ft 2 in. (2,820 mm) loading height matches with 30- to 60-ton hydraulic excavators or 5- to 7.5-yd3 wheel loaders. Two single-staged body lift cylinders provide a 70° dump angle. The truck features a newly designed engine hood for easy access and increased cooling capacity, and is equipped with a hydraulically driven, auto-reversing fan to help keep the radiator and charge air cooler clean.  The HM300-3 also has Komatsu’s EMMS (Equipment Management Monitoring System) with enhanced diagnostic features.