Doosan has launched the new DX490LC-7 and DX530LC-7 Stage V 50t crawler excavators, offering improved performance compared to previous Stage IV models.
“These new 50t excavators offer the strength and productivity needed for heavy-duty work such as large-scale earthmoving, moving rock, pulling down buildings, secondary breaking, loading haulers and pipeline projects found on quarrying and mining, highway, aggregate, demolition, utility and general construction projects,” stated Doosan.
To meet Stage V engine emission regulations, the DX490LC-7 and DX530LC-7 excavators are powered by the new Scania DC13 Stage V compliant diesel engine, providing a higher power output of 294 kW (394 HP).
The Scania engine offers a new solution to exceed Stage V with ‘super-efficient’ DOC/DPF+SCR after-treatment technology to ensure minimal emissions.
Thanks to the new technology, maintenance of the diesel particulate filter (DPF) has been greatly reduced, with a six times longer automatic regeneration interval (60 hours) and an ash cleaning interval that is twice as long at 8,000 hours, compared with the previous DPF in the DX-3 generation machines.
“The operator is now able to see the amount of ash build up in the DPF from their seat in the cab via the gauge panel and whether regeneration has been successful,” said Doosan.
“In the DX490LC-7 and DX530LC-7, the enhanced performance of the DC13 engine is combined with a Virtual Bleed Off (VBO) hydraulic system (D-Ecopower+) and the new generation Smart Power Control Technology (SPC3), providing an overall fuel efficiency increase of 11%.”
Increased pump capacity and the higher power of the engine produces up to an 8% increase in productivity, which Doosan represented “the best-in-class performance in the 50t market”.
The firm continued: “There are now four power modes available on both machines, which help to simplify the operation of the new excavators 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.
“Already excelling in spaciousness and ergonomics, the new cab in the DX490LC-7 and DX530LC-7 models takes operator comfort and ease of operation to unheralded levels. Like the new 30-40 tonne Stage V models, the cab has a new high-quality seat and offers more features as standard than other machines on the market, ensuring super controllability and high precision in all applications.”