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New 42tonne excavator from Doosan

First publishedin Aggregates Business Europe
January February 2013
Doosan DX420LC-3 large crawler excavator
The new Stage IIIB compliant DX420LC-3 large crawler excavator has been launched by Doosan Construction Equipment.

Powered by the Isuzu AL-6UZ1X common rail six-cylinder turbo-charged diesel engine meeting Stage IIIB engine emission regulations through the use of Exhaust Gas Recirculation (EGR) and Diesel Particulate Filter (DPF) after-treatment technologies, the new engine delivers 19% more power (270kW) at 2,000rpm with a 6% increase in engine torque.

A new travel device in the DX420LC-3 excavator contributes to an increase in drawbar pull by 10%; a 5% increase in swing torque and a 10% increase in the travel speed, says Doosan.

“New hydraulic pumps and valves have increased main pump flow by 6%, providing a combination of higher overall pressures and hydraulic flow for increased comfort, travelling performance, smoothness, power and improved attachment work,” says Doosan.

“Compared to the previous model, the front end lifting capacity has been increased by 14%, while side end capacity has been boosted by 2%. The arm/bucket digging forces have both been increased by up to 3%.”

A new ROPS and OPG-certified cab offers 6% more space for the operator.

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