New Doosan DX420LC-7 Stage V excavator

Latest-generation Scania-powered machine said to offer best-in-class fuel efficiency and productivity

DOOSAN Infracore Europe have launched the new DX420LC-7 Stage V 43-tonne crawler excavator, which is said to provide best-in-class fuel efficiency and productivity. To meet Stage V engine emission regulations, the DX420LC-7 is powered by the new Scania DC13 Stage V compliant diesel engine which delivers 257kW (344.4hp) – the biggest engine in this machine segment.

Using super-efficient DOC/DPF+SCR after-treatment technology, the Scania engine offers a new solution to exceed Stage V regulations that does not require exhaust gas recirculation. This is combined with the new-generation Smart Power Control Technology (SPC3) to provide 3–10% better fuel efficiency (cubic metres/litre) than the previous DX420LC-5 model.

Four power modes are now available, helping to simplify the operation of the new DX420LC-7 excavator compared with the more complex choice of eight power modes and SPC combinations on the previous-generation model. The operator is able to set the power mode (P+, P, S or E) in both one-way and two-way working modes.

In addition, by bringing together the SPC3 system and a new Doosan Mottrol main control valve, company tests have shown that the new DX420LC-7 offers 2% more productivity than the DX420LC-5, ensuring the best digging, swing and tractive forces together with the best lifting performances for this size of machine.

With a bucket capacity of 1.92 cubic metres, the machine has a maximum digging depth of 7,635mm, maximum digging reach of 11,430mm and maximum digging height of 10,615mm.

Already excelling in spaciousness and ergonomics, the new cab on the DX420LC-7 model is said to take ease of operation and comfort for the operator to an even higher level. Like all other Doosan Stage V models, the cab has a new high-quality seat and boasts more features as standard than other machines on the market, ensuring super controllability and high precision in all applications.

Key new features in the cab include a new 8in touch-enabled colour LCD gauge panel with 30% larger screen, a stereo system integrated in the gauge panel (with Bluetooth streaming function), a keyless start system, enhanced interior design, improved air-conditioning/defrost performance, two-step seat heating, 360° cameras, LED-type cab space lamp, ultrasonic obstacle detection (optional), LED lights (optional), side protection or catwalk (optional) and an air compressor (optional).

Fitted as standard, the 360° cameras provide full visibility around the excavator and allow the operator to see a top-down view of the area outside the machine. The camera array comprises a front camera, two side cameras and a rear camera. The camera display is separated from the gauge panel.

Thanks to the new DOC/DPF+SCR 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 of 6,000 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 that a regeneration has been successful.

Furthermore, the new DX420LC-7 model is factory-installed with Doosan’s state-of-the-art DoosanCONNECT wireless fleet-monitoring system. The DoosanCONNECT system offers a web-based fleet-management solution for monitoring the performance and security of machines and promoting preventative maintenance.

Also, as a leading brand in information and communications technology (ICT), Doosan have taken a large step forward by offering customers lifetime-free cellular service with all DX-7 generation excavators. This means that customers can use the DoosanCONNECT service without any limitation as long as they use the service with a cellular network. Satellite service will be offered free-of-charge for a three-year period.