Komatsu America Corp. introduces the PC390LC-11 hydraulic excavator.  With a net horsepower of 257 hp. (192 kW), the PC390LC-11 is powered by a Komatsu SAA6D114E-6 engine, which is EPA Tier 4 Final emissions certified. Komatsu’s Tier 4 Final engines are built on the solid foundation that started in 1996 with the introduction of Komatsu’s first Tier 1 engine. The culmination is today’s Tier 4 Final engine that is productive, dependable and efficient. This new excavator leverages Komatsu’s leadership in technology and innovation by delivering an environmentally friendly engine that provides high levels of performance while reducing operating costs and improving fuel efficiency.

With an operating weight between 87,388 lbs. (39,638 kg) and 89,248 lbs. (40,579 kg), the PC390LC-11 has upgraded cab features and an enhanced power mode for greater productivity and lower cost per ton. In addition to improved productivity and upgraded cab features, the PC390LC-11 maintains the same powerful lifting performance and stability of the previous model.  The PC390LC-11 continues to feature one size class larger PC450 class heavy duty undercarriage components to maintain the same high lift capacity and lateral stability as the former model.  The larger undercarriage has a 6% wider track gauge and offers up to 18% greater over-the-side lift capacity than the PC360LC-11.

The excavator is equipped with the latest KOMTRAX® technology, which relays data such as fuel levels, Diesel Exhaust Fluid (DEF) levels, operating hours, location, cautions and maintenance alerts. A new Operator Identification System reports key operating information for multiple operators, and the new Auto Idle Shutdown function helps reduce idle time as well as operating costs.

Komatsu EPA Tier 4 Final Emission Certified Engine Productive, Dependable, Efficient

Komatsu’s proven Tier 4 Interim foundation integrates a Selective Catalyst Reduction (SCR) system using DEF to meet EPA Tier 4 Final emission regulations for NOx emissions. The engine uses an advanced electronic control system to manage the air-flow rate, fuel injection, combustion parameters, and after treatment functions to optimize performance, reduce emissions, and provide advanced diagnostic capability. Komatsu continues to use its Komatsu Variable Geometry Turbocharger (KVGT) and an Exhaust Gas Recirculation (EGR) valve for precise temperature and air management control as well as longer component life.

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

Highly Efficient Hydraulic System

All major components on the new PC390LC-11 including the engine, hydraulic pumps, motors, and valves are exclusively designed and produced by Komatsu. This integrated design uses an efficient closed center load sensing hydraulic system and features a new enhanced power mode for improved performance and reduced cycle times.

Operator Environment

The PC390LC-11 cab provides a comfortable and quiet work environment. The ISO 12117-2 ROPS certified cab, specifically designed for hydraulic excavators, gains strength from a reinforced box structure framework. The cab is mounted on viscous isolation dampers that provide low vibration levels. A standard heated air suspension high back seat with new fully adjustable armrests provides improved comfort.  In addition to the standard AM/FM stereo radio, a remote located auxiliary input for connecting external devices is provided to play music through the cab speakers.  Additionally there are two 12-volt power ports incorporated into the cab, and optional joysticks are available with proportional controls for attachment operation.

For global support, the high-resolution 7” LCD color monitor features enhanced capabilities and displays information in 33 languages. The operator can easily select up to six working modes to match machine performance to the application. The monitor panel provides information on DEF fluid level, Eco guidance, operational records, fuel consumption history, and utilization information.  A new display interface combines vehicle information with a wide landscape view from the standard rearview camera so the operator can easily view the working area directly behind the machine.

Convenient Maintenance and Serviceability

The PC390LC-11 has handrails on both sides of the upper structure for easy accessibility and service access. A large 10.3-gallon (39 liter) refill capacity DEF tank is located in a lockable compartment directly behind the right side toolbox, and is sized to provide a 2:1 diesel to DEF refill ratio.   Side-by-side radiator and hydraulic oil coolers make it easy to maintain and service the machine.

The new excavator is equipped with the exclusive Komatsu EMMS (Equipment Management Monitoring System), which has enhanced diagnostic features to give the operator and technicians greater monitoring and troubleshooting capabilities for preventative maintenance, minimizing diagnostic and repair time.

All Komatsu Tier 4 Final construction machines come with Komatsu CARE®. Komatsu CARE provides scheduled factory maintenance for the first 2,000 hours or three years, and includes a 50-point inspection at each service, as well as two complimentary KDPF exchanges in the first five years.  Additional enhancements related to the Selective Catalyst Reduction system have also been added.

Komatsu America Corp. is a U.S. subsidiary of Komatsu Ltd., the world’s second largest manufacturer and supplier of earth-moving equipment, consisting of construction, mining and compact construction equipment. Komatsu America also serves forklift and forestry markets. Through its distributor network, Komatsu offers a state-of-the-art parts and service program to support its equipment. Komatsu has proudly provided high-quality reliable products for nearly a century. Visit the website at www.komatsuamerica.com for more information.