Doosan introduce new DX380LC-7 excavator
Launch of 40-tonne machine completes Doosan 30–40-tonne Stage V excavator line-up
WITH the launch of the new DX380LC-7 40-tonne model, Doosan have completed their 30–40-tonne family of Stage V excavators. Together with the new Stage V DX300LC-7 30-tonne and DX350LC-7 36-tonne models, the DX380LC-7 is said to offer an unmatched combination of performance, operating features, fuel efficiency, reliability and durability in this class.
Building on the highly successful design of the previous Stage IV machines, the new Stage V excavators introduce major enhancements in operator comfort, machine controllability, productivity, uptime and return on investment, with a strong focus on low fuel consumption, increased power, robustness and versatility.
With these new 30–40-tonne machines, Doosan say they have tried to ensure that productivity and environmental protection are truly compatible. The DX380LC-7 is powered by the Scania DC09 Stage V compliant diesel engine, which provides 240kW of power at 1,800 rev/min.
There are now four power modes available on all three machines, which help to simplify the operation of the new excavators compared with 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.
In common with the DX350LC-7 crawler excavator, the DX380LC-7 features Doosan’s innovative D-ECOPOWER technology, providing operators with higher productivity and lower fuel consumption per hour, as well as smoother controls.
Doosan say the D-ECOPOWER technology focuses on the role of the hydraulics system and demonstrates their continuous iteration of all the processes and components utilized in the company’s new-generation products to achieve unprecedented levels of diesel energy efficiency.
This technology utilizes an electronic pressure-controlled pump within a closed-centre hydraulic system to accomplish increases of up to 26% in productivity and up to 12% in fuel consumption improvements, depending on the mode selected. The closed-centre main control valve minimizes pressure loss, while the electric pressure-controlled pump manages and optimizes engine power more effectively.
The D-ECOPOWER system uses nine sensors to detect the amount of hydraulic oil necessary to accomplish a specific task and precisely meter the amount of oil required rather than continuously forcing a fixed amount of oil through the system, thereby improving efficiency.
Software is utilized to electronically reproduce the full benefits of an open-centre hydraulic system with very little energy loss. The hydraulic system and engine horsepower are fully optimized and synchronized, further reducing losses within the system.
Improved feedback to the operator through the joystick results in improved machine control and less operator fatigue. The acceleration and deceleration of the excavator workgroup functions are smoother, allowing operators to perform repetitive swinging and digging motions with fewer jerking movements.
The new cab in the DX380LC-7 model is designed for operator comfort and ease of operation. Like the other two Stage V models, the cab has a new high-quality seat and is said to offer more features as standard than other machines on the market, ensuring high levels of controllability and precision in all applications.
Key standard cab features include a new 8in touch-enabled colour LCD gauge panel that provides more information via a 30% larger screen, a stereo system integrated in the gauge panel, and keyless start system, whilst optional features include ultrasonic detection of obstacles, LED lights, side protection, and an air compressor.
As standard, 360-degree 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 separated from the gauge panel.
The new DX380LC-7 model is factory-installed with Doosan’s state-of-the-art DoosanCONNECT wireless fleet-monitoring system, which offers a web-based fleet-management solution for monitoring the performance and security of machines and promoting preventative maintenance.