Doosan launches company’s largest ever excavator

DOOSAN has launched the largest excavator ever manufactured by the company.

The DX800LC-7 Stage V compliant 80-tonne crawler excavator is described as having the ‘highest hydraulic flow for this size of machine’.

The machine boasts a new ‘very spacious’ operator cab, equipped with ergonomic controls and instrumentation. Noise levels are reduced through ‘enhanced’ sealing of the engine compartment and ‘extensive’ use of sound-dampening materials, the manufacturer explained.

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 more reliability and a long service.

The model is powered by the new stage V version of the Perkins 2506J diesel engine, providing a high power output of 403 kW (548 HP). The engine meets Stage V emission regulations by utilising exhaust gas recirculation, selective catalyst reduction, diesel oxidation catalyst and diesel particulate filter (DPF) after-treatment technologies. The DPF automatically regenerates every 25 hours, with the excavator continuing to work during this period.  

Doosan said a Virtual Bleed Off (VBO) hydraulic system provides a ‘best-in-class’ hydraulic flow of 1008 l/min and a high system pressure of 343 bar. The D-ECOPOWER+ technology utilises an electronic pressure-controlled pump within a closed centre hydraulic system to optimise productivity and fuel consumption, depending on the mode selected.

Operators can switch between two modes – Boom or Swing – giving priority to boom or swing movements, to best match the task in hand. The 2-spool Boom Down Regeneration system is said to provide faster working speeds. The 2-spool hydraulic system for the bucket cylinder also increases hydraulic flow and the working speed of the bucket.

The cab features an 8-inch touch-enabled colour LCD gauge panel, stereo system integrated in the gauge panel, keyless start system, improved air conditioning/defrost performance, 360o cameras, LED lights pack, side protection and catwalks, and optional air compressor and air gun for cab cleaning.

The DX800LC-7 is factory-installed with Doosan’s DoosanCONNECT wireless fleet monitoring system. A reversible cooling fan is installed as standard, which can be used in the reverse direction to blow away dust in the radiator and oil cooler. The machine also features a new heavy duty front end with five different front combinations possible based on 6.6m short and 7.7m long booms. The counterweight design has been changed to include a horizontal mounting system.

ETP (Electric Fuel Transfer Pump) has been installed as standard, so operators can simply press a switch to start refuelling the machine. The width of the catwalks have been increased by 20% to 520mm.

Doosan said the machine is primarily intended for customers in mining and quarrying applications.