Doosan launch new DX800LC-7 excavator
New machine said to offer best performance in 80-tonne class with highest power and flow plus comfort and smoothness
DOOSAN have launched their largest ever excavator – the new 79.5-tonne DX800LC-7 Stage V compliant crawler model, which is primarily intended for use in mining and quarrying applications.
Driven by the most powerful engine in the 80-tonne class, the DX800LC-7 also has the highest hydraulic flow for this size of machine, providing best-in-class performance with higher productivity, lower fuel consumption and smoother controls.
As with all Doosan excavators, much attention has been given to operator comfort and safety. The DX800LC-7 has a new and spacious operator cab, equipped with ergonomic controls and instrumentation. Special care has also been taken to ensure noise is kept to a minimum.
All components and assemblies have been designed, built and tested to ensure durability. Multi-stage filters and features such as track guards and cylinder guards for the boom and arm, the auto grease system and greased and sealed track links are designed to provide superior reliability and a long service life.
The DX800LC-7 excavator is powered by the new stage V version of the well-proven six-cylinder Perkins 2506J diesel engine, which provides a power output of 403kW (548hp) at 1,800 rev/min, more than any other machine in this class. The engine meets Stage V emission regulations by utilizing EGR, SCR, DOC and DPF after-treatment technologies.
The high output of the engine is combined with a virtual bleed-off (VBO) hydraulic system (D-ECOPOWER+) that provides a best-in-class hydraulic flow of 1,008 litres/min and a high system pressure of 343 bar, which together are said to contribute to the best performance in the 80-tonne market.
Doosan’s D-ECOPOWER+ technology utilizes an electronic pressure-controlled pump within a closed-centre hydraulic system to optimize productivity and fuel consumption, depending on the mode selected. A closed-centre main control valve minimizes pressure loss, while the electric pressure-controlled pump manages and optimizes engine power more effectively.
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 output are fully optimized and synchronized, further reducing losses within the system.
Improved feedback to the operator through the joystick is said to result 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 less jerking movements.
The operator can also switch between Boom or Swing modes, to best match the application they are working on.
Already excelling in spaciousness and ergonomics, the new cab in the DX800LC-7 is designed to enhance operator comfort and ease of operation. It has a new high-quality seat with two-step heating and claims to offer more features as standard than other machines on the market, including a new 8in colour LCD gauge panel, an integrated stereo system with Bluetooth streaming function, a keyless start system and improved air-conditioning/defrost performance.
A full camera array comes as standard, comprising a front camera, two side cameras and a rear camera. The camera display is separated from the gauge panel, provides full visibility around the excavator and allows the operator to see a top-down view of the area outside the machine. This is combined with a 360°AVM (all-around view monitoring) system.
LED working lamps are also standard on the DX800LC-7, providing up to 75% better illumination of the workspace around the excavator and ensuring improved productivity during dusk and night-time work.
The new DX800LC-7 is factory-installed with Doosan’s state-of-the-art DoosanCONNECT system – a web-based fleet-management solution that is useful for monitoring machine performance and security as well as promoting preventative maintenance.
The DX800LC-7 features a new heavy-duty front end with a total of five different front combinations possible based on 6.6m short and 7.7m long booms. Bucket capacity is 4.6 cubic metres.
In addition, the DX800LC-7 has an ETP (electric fuel-transfer pump) as standard. With the ETP, the operator can simply press a switch to start refuelling the machine, saving time and effort in maintenance work. The width of the catwalks on the DX800LC-7 have also been increased by 20% to 520mm, providing more space for maintenance and to help prevent accidents.