Komatsu America Corp.’s new HM400-5 articulated dump truckKomatsu America Corp.’s new HM400-5 articulated dump truck has a 44.1-ton (40 metric ton) payload and a gross vehicle weight of 165,633 lb (75,130 kg). It is powered by a Komatsu SAA6D140E-7 Environmental Protection Agency (EPA) Tier 4 Final-compliant diesel rated at 469 hp (350 kW). The new model’s 10-ft 5-in. (3,164-mm) loading height matches well with 40- to 60-ton hydraulic excavators or 5.5- to 7.5-yd3 wheel loaders. Selectable working modes allow the operator to choose between Economy and Power modes to tailor machine performance to the application or work conditions.

The HM400-5 features the Komatsu Traction Control System (K-TCS), which automatically provides optimum traction when operating in soft ground conditions, and K-ATOMiCS—Komatsu Advanced Transmission with Optimum Modulation Control System. K-ATOMiCS offers a six-speed, fully automatic transmission that uses an advanced electronic system to eliminate shift shock and torque cutoff to improve operator and engine efficiency. 

An integrated Payload Meter (PLM) is now standard on the HM400-5. The PLM displays the loaded material weight on a high-resolution, in-cab LCD monitor for the truck operator and shows payload information to the loader operator via external display lamps. PLM data is also transferred via KOMTRAX and can be accessed online. The ROPS/FOPS Level-2 certified cab has a newly designed rounded front dash panel with easily reachable switches. An auxiliary input has been added to connect a smart phone or other device along with two 12-volt ports. A 7-in. LCD monitor offers enhanced capabilities and displays information in 25 languages. Through the monitor, the operator can easily modify settings for items such as the Auto Idle Shutdown or the auto-reversing fan, check operational records, monitor DPF or check how much time is required before the next maintenance interval. A rearview monitor system with a separate LCD monitor is standard.

The new truck has a lightweight fiberglass engine hood for easy access, increased cooling capacity, and two standard hydraulically driven, reversible fans to help keep the radiator and charge air cooler clean. The cab tilts rearward for easy access to the transmission and an electrically powered tilt function is now standard on the HM400-5.

The HM400-5 is equipped with the exclusive Komatsu EMMS (Equipment Management Monitoring System) and the KOMTRAX remote monitoring technology.