New crawler excavator from Doosan
Doosan Infracore Construction Equipment launch the 42-tonne DX420LC-3 crawler excavator
DOOSAN Construction Equipment have introduced their new Stage IIIB-compliant DX420LC-3 excavator, which, they say, offers several improvements over the outgoing model, including an substantial increase in performance specification, such as drawbar pull, arm and bucket digging forces, and lifting capacities, to provide higher overall productivity.
The 42-tonne DX420LC-3 is powered by an Isuzu AL-6UZ1X common-rail, six-cylinder turbocharged diesel engine that delivers a maximum power output of 270kW (360hp) at 2,000 rev/min.
The machine is also equipped new travel device that contributes to a 10% increase in drawbar pull, a 5% increase in swing torque and a 10% increase in travel speed.
Newer hydraulic pumps and valves provide enhanced main pump flow to help deliver a combination of higher overall pressures and hydraulic flow for increased comfort, travelling performance, smoothness, power and improved attachment work.
The hydraulic system pressure has been increased by 9% to 350 bar, resulting in higher lifting capacities, faster cycle times and greater breakout forces.
The heavy-duty undercarriage on the DX420LC-3 features reinforced track links, track springs, sprockets and bushings, all of which have extended the service life of the machine.
Customers will be given an expanded choice of options on the excavator, including a narrow 3m undercarriage and two-mode floating-boom system. Options for heavy-duty applications include: dual pump flow for high-flow attachments; a 6,700mm long heavy-duty boom; a straight travel pedal, an oil-washed air cleaner; and added protection such as dual/full-length track guards.
