Komatsu Launches New Articulated Truck

Komatsu America Corp. introduces the HM400-3 articulated truck. The HM400-3 is powered by a Komatsu SAA6D140E-6 engine with a net horsepower of 469 hp (350 kW) 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 a more environmentally friendly engine that increases power while decreasing fuel consumption.

With the introduction of the Komatsu CARE Program, every Komatsu Tier 4 Interim construction machine comes standard with complimentary factory scheduled maintenance for 2,000 hours or the first three years (whichever occurs first), and includes two complimentary Komatsu Diesel Particulate Filter (KDPF) exchanges within the first 5years. 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 increased 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 enhance 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 KDPF filter and regeneration system are integrated so as to not interfere with daily operation but 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 Komatsu Advanced Transmission with Optimum Modulation Control System (K-ATOMiCS). K-ATOMiCS offers a six-speed, fully automatic transmission that uses an advanced electronic system to eliminate shift shock and torque cutoff to aid operator in operating the engine in the most efficient range. The electronic system automatically selects the gear based on vehicle speed, engine speed and the shift position selected, resulting in powerful acceleration, smooth down shifting and synchronized engine speed when climbing slopes. K-ATOMiCS works to minimize operator fatigue and load spillage from the body, thus increasing productivity.

A large automatic retarder allows the operator to select the optimum operating speed on downhill travel and fully loaded hauls, thus eliminating effects by inertial acceleration.