by Kyle Molyneux | Tue 14 Jul 2020
Doosan’s biggest digger yet
Doosan has launched its new Stage 5 compliant DX800LC-7 80-tonne crawler excavator, the largest excavator model ever manufactured by the company. Coinciding with the launch, Doosan has also revealed the sale of the first DX800LC-7 in Europe to a customer in Finland.
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. The DX800LC-7 is said to have a very spacious operator cab, equipped with ergonomic controls and instrumentation. Special care has been taken to ensure noise is kept to a minimum through enhanced sealing of the engine compartment and extensive use of sound-dampening materials.
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 is easy to maintain, further reducing downtime to a minimum.
The DX800LC-7 excavator is powered by the new Stage 5 version of the well-proven Perkins 2506J diesel engine, providing a high power output of 548hp, more than any other machine in this class, reckons its maker. The engine meets Stage 5 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 and the excavator continues to work unaffected during this regeneration phase. The operator can check the status of the DPF via the display on the gauge panel in the cab.
The high output of the engine is combined with a Virtual Bleed Off (VBO) hydraulic system (D-EcoPower+), providing a best-in-class hydraulic flow of 1,008L/min and a high system pressure of 343bar, together contributing to the best performance in the 80-tonne market.
The DX800LC-7 is primarily intended to serve customers in mining and quarrying applications, removing overburden and loading large amounts of material into articulated dump trucks or rigid frame trucks. The DX800LC-7 may also be operated on large construction and infrastructure projects, particularly where considerable amounts of material need to be excavated and stockpiled or loaded into trucks to be moved.
Key stats for the new Doosan DX800LC-7 excavator include a 4.6m3 bucket capacity, a 7.7m digging depth (with 7.7m boom and 2.9m arm), a 12.6m digging reach and 11.9m digging height, as well as a 4m tail swing radius, 37.6-tonne digging force over the bucket, 33.5-tonne digging force over the arm, and a maximum speed of 4.8km/h in high range.
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