Komatsu Launches New HM400-3 Articulated Truck

Komatsu America Corp. introduces the HM400-3 articulated truck. With a net horsepower of 469 hp (350 kW), the HM400-3 is powered by a Komatsu SAA6D140E-6 engine and is EPA Tier 4 Interim and EU Stage 3B emissions certified. Komatsu leveraged its leadership in technology and innovation—building on its proven Tier 3 engine platform—to design an environmentally friendly engine that increases power while decreasing fuel consumption.
Every Komatsu Tier 4 Interim construction machine comes standard with Komatsu CARE™ complimentary factory scheduled maintenance for 2,000 hours or the first three years, and includes two complimentary KDPF exchanges within the first 5 years. The Komatsu CARE program covers all new Komatsu Tier 4 Interim equipment, whether rented, leased or purchased.
The HM400-3 features a maximum gross vehicle weight (GVW) of 162,569 lbs. (73,740 kg), hauling up to a 44.1 US ton (40 metric ton) payload at its maximum ground speed of 34.7 mph (55.9 kph). Improved operating performance, lower fuel consumption, improved operator comfort and enhanced serviceability are features of the HM400-3 that provide maximum productivity and lower operating costs.
The HM400-3 is equipped with the latest KOMTRAX® technology, which sends machine operating information to a secure website utilizing 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 KOMTRAX fleet monitoring system increases machine availability, reduces the risk of machine theft, allows for remote diagnosis by the distributor, and provides a wealth of other information to drive business efficiency and productivity.
Special features of the new HM400-3 include:
• EPA Tier 4 Interim and EU Stage 3B Emissions Certified Engine
Built upon proven Tier 3 technology, the SAA6D140E-6 engine provides increased horsepower while lowering fuel consumption. The Komatsu Tier 4 Interim engine uses an advanced electronic control system to manage airflow rate, fuel injection, combustion parameters, and after-treatment functions to optimize performance, reduce emissions, and provide advanced diagnostic capability.
As a leader in hydraulic technology, Komatsu has also developed a hydraulically actuated Variable Geometry Turbocharger (KVGT) and Exhaust Gas Recirculation (EGR) valve, resulting in better precision and air management as well as longer component life. The Komatsu Diesel Particulate Filter (KDPF) has an integrated design that will not interfere with daily operation but will keep the operator aware of its status.
• Improved Operation
The HM400-3 features the new Komatsu Traction Control System (K-TCS). The K-TCS system automatically provides optimum traction when operating in soft ground conditions. As ground conditions worsen, speed sensors located on four wheels detect tire slippage, and automatic application of the inter-axle differential lock occurs. If tire slippage continues to be detected, four independent brakes can be applied to slipping wheels to regain traction.
The HM400-3 is enhanced with 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. The electronic system automatically selects the ideal gear based on vehicle speed, engine rpm and the shift position chosen, resulting in powerful acceleration, smooth down shifting and synchronized engine speed when climbing slopes. K-ATOMiCS ultimately minimizes operator fatigue, keeps the load in the body and increases productivity.
A large automatic retarder allows the operator to select the optimum operating speed on downhill travel and fully loaded hauls, eliminating acceleration generated by the grade of the slope.
• Increased Payloads
Through body design optimization the HM400-3 features increased body capacity and payload. The low 10’5”” (3164 mm) loading height easily matches with 40 ton to 60 ton hydraulic excavators or 5.5 yd³ to 7.5 yd³ wheel loaders. In addition, the two single-staged body lift cylinders provide a 70-degree dump angle.
• Enhanced Operator Environment
The new cab design provides a comfortable and quiet work environment for maximum operator can maximize productivity. The ROPS/FOPS Level 2 certified cab features a new designed rounded front dash panel with easy-to-reach switches. The dashboard has been redesigned and the high back, heated air ride seat with 3-point seat belt has been relocated to improve visibility. An auxiliary input has also been added to connect an MP3 player or other device along with two 12-volt ports that have been incorporated into the cab.
A new high resolution 7” LCD monitor features enhanced capabilities and displays information in 25 languages for global support. Using the monitor, the operator can easily modify settings for items such as the Auto Idle Shutdown or the auto-reversing fan; check operational records, such as driving history or fuel consumption; monitor the KDPF or check for when the next maintenance interval is required.
The monitor also offers the operator the option of using the ECO guidance function, which provides operational tips to reduce fuel consumption. A rear view monitor system with a separate 7” LCD monitor is standard with every machine and is mounted on the right hand side of the console for operator convenience.
• Convenient Maintenance and Serviceability
To reduce costly downtime, the HM400-3 provides easy service access. The new model features a newly designed engine hood for easy access, increased cooling capacity, and two standard hydraulically driven auto-reversing fans to help keep the radiator and charge air cooler clean.
The truck is equipped with the exclusive Komatsu EMMS (Equipment Management Monitoring System) that has enhanced diagnostic features that give the operator and technicians greater monitoring and troubleshooting capabilities. EMMS also continuously monitors all critical systems, preventative maintenance, and provides troubleshooting assistance to minimize diagnosis and repair time.

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