Technical Description
The Komatsu PC390LC-10 hydraulic excavator is a robust construction machine designed for heavy-duty earthmoving with advanced performance and durability features. Powered by a Komatsu SAA6D114E-5 turbocharged engine, it delivers a net output of 257.5 hp (192 kW) at 1950 rpm, meeting EPA Tier 4 Interim and EU Stage 3B emissions standards. The engine's large displacement of 540.1 cu in with bore/stroke dimensions of 4.5 in by 5.7 in ensures strong torque and reliable operation. The excavator's operating weight ranges from approximately 87,000 to 91,500 lbs depending on configuration, enabling excellent stability and lift capacity.
The PC390LC-10 offers multiple boom and stick options with varying arm crowd forces and digging forces to suit diverse applications. For example, Option 1 provides bucket digging forces up to 58,225.6 lbs (ISO) and maximum digging depths of 21.8 ft, while Option 3 extends digging depth to 26.6 ft and reach along the ground to 38.5 ft. Maximum dumping heights range from 23 ft to 25 ft across options. The hydraulic system includes a pump flow capacity of 141.4 gallons per minute and a swing speed of 9.5 rpm, promoting smooth and efficient machine cycles.
In terms of dimensions, the excavator has a track gauge of 9 ft, track length on the ground of over 14 ft, and a width to outside of tracks of 12 ft, with ground clearance at 1.9 ft. The cab is spacious, measuring 112.6 in high by 10318.3 ft wide, featuring ergonomic controls and visibility enhancements. The undercarriage includes 49 shoes per side (27.6 in each), drawbar pull up to 73,962 lbs, max travel speed of 3.5 mph, and ground pressure around 8.4 psi, suitable for varied terrain.
Designed for endurance, the PC390LC-10 incorporates thick, high-tensile steel booms and arms with a heavy-duty aftertreatment system combining Komatsu Diesel Particulate Filter and selective catalytic reduction to minimize emissions. Its advanced electronic control system optimizes engine and hydraulic performance, supporting functions such as Power Max to temporarily boost digging force, breaker and attachment modes, and multiple operating modes fine-tuned for fuel efficiency and productivity. Additional features include enhanced diagnostics, easy maintenance access, and operator comfort amenities such as heated air-suspension seats.
Overall, the Komatsu PC390LC-10 is engineered to deliver strong digging forces, long reach, high stability, and efficient fuel consumption for demanding excavation tasks in mining, construction, and heavy civil engineering.
