Komatsu America Corp. Introduces the HM300-5 Articulated Dump Truck

Komatsu America Corp. has introduced its HM300-5 articulated dump truck. The HM300 Tier 4 Final was exhibited earlier this year at CONEXPO-CON/AGG 2014.

Featuring a net 324HP (242 kW), the HM300-5 is powered by a Komatsu SAA6D125E-7 engine that is EPA Tier 4 Final emissions certified. Komatsu’s Tier 4 Final engines are built on the solid foundation inaugurated in 1996 with the introduction of Komatsu’s Tier 1 engines. This new articulated dump truck leverages Komatsu’s leadership in technology and innovation by delivering a more environmentally friendly engine that provides high levels of performance while reducing fuel consumption and operating costs.

With a 30.9 US ton (28 metric ton) payload and a gross vehicle weight (GVW) of 117,892lbs. (53,475kg), the HM300-5 maintains the productivity and performance of the previous model, and offers improved fuel efficiency to deliver what customers have come to expect from Komatsu articulated dump trucks.

High Productivity

Through body design optimization, the HM300-5 has increased body capacity and payload. The low 9’2” (2820mm) loading height easily matches with 30-ton to 60-ton hydraulic excavators or 5 yd³ to 7.5 yd³ wheel loaders. Additionally, the two single-staged body lift cylinders provide a 70-degee dump angle. Selectable working modes allow the operator to choose between Economy and Power modes to tailor machine performance to the application or work conditions.

The HM300-5 features the Komatsu Traction Control System (K-TCS) that automatically provides optimum traction when operating in soft ground conditions. As ground conditions worsen and tire slippage is detected by the speed sensors located on four wheels, automatic application of the inter-axlelock occurs. If tire slippage continues to be detected, then four independent brakes can be applied to slipping wheels to regain traction.

The HM300-5 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. It automatically selects the ideal gear based on vehicle speed, engine rpm and the shift position chosen. This results in powerful acceleration, smooth down- shifting and synchronized engine speed when climbing slopes. This 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.

An integrated Payload Meter (PLM) is now standard on the HM300-5. The PLM displays the loaded material weight on the 7” high-resolution LCD monitor for the truck operator as well as indicates payload information to the loader operator via external display lamps. PLM data is also transferred via KOMTRAX and can be accessed by web.

Komatsu EPA Tier 4 Final Emission Certified Engine

Komatsu’s EPA Tier 4 Final engines are built on the strength of its proven Tier 4 Interim foundation. By integrating Selective Catalyst Reduction (SCR), the Tier 4 Final engine further reduces NOx emissions using AdBlue / DEF. The Komatsu Tier 4 Final engine uses an advanced electronic control system to manage the airflow rate, fuel injection, combustion parameters, and after treatment functions to optimize performance, reduce emissions, and provide advanced diagnostic capability. The result is lower fuel consumption with no loss of performance. Komatsu continues to use a Komatsu Variable Geometry Turbocharger (KVGT) and an Exhaust Gas Recirculation (EGR) valve for more precise temperature and air management control as well as longer component life.

For product reliability and durability in demanding conditions, Komatsu developed the entire system, including the control software which is critical to the effective operation of the aftertreatment system. This control system is also integrated into the machine’s on-board diagnostics systems and KOMTRAX, Komatsu’s standard telematics system.