The 40-tonne DX380LC-7 (pictured above) joins a family that also has the 30-tonne DX300LC-7 and 36-tonne DX350LC-7.
The new Stage V machines build on the design of the previous Stage IV models, with added operator comfort, machine controllability and, it is claimed, productivity.
The Korean manufacturer claims more uptime and a better return on investment for the new models, along with low fuel consumption and increased power.
Bucket capacity of the DX380LC-7 is 2.32 m3. With its 3.95-metre arm, digging depth is 8165 mm and digging reach is 11930 mm.
The DX380LC-7 is powered by the Scania DC09 diesel engine, providing 240 kW of power at 1800 rpm. There are now four power modes available on all three machines, designed to simplify the operation compared to the more complex choice of eight power modes and SPC combinations in the previous generation machines. The operator is able to set the power mode (P+, P, S or E) in both one-way and two-way working modes.
As with the DX350, the DX380 has Doosan’s D-Ecopower technology, which uses an electronic pressure-controlled pump within a closed-centre hydraulic system to deliver up to 26% increase in productivity and up to 12% less fuel consumption, depending on the mode selected. A closed centred main control valve minimises pressure loss, while the electric pressure-controlled pump manages and optimises engine power more effectively.
D-Ecopower uses nine sensors to detect the amount of hydraulic oil necessary to accomplish a specific task and precisely metre the amount of oil required, rather than continuously forcing a fixed amount of oil through the system.
Inside the cab there is a new eight-inch touch-enabled colour LCD gauge panel, with an integrated stereo system. Optional extras include ultrasonic sonic detection of obstacles, LED lights, side protection and an air compressor.
As standard, 360° cameras provide full visibility around the excavator and allow the operator to see a top-down view of the area outside the machine. The camera array comprises a front camera, two side cameras and a rear camera. The camera display is separate from the gauge panel.
Pictured below is the whole 30-40 tonne family: (left to right) the DX300LC-7, DX350LC-7 and DX380LC-7.