The first new generation crawler excavators include the DX300LC-3 and DX340LC-3 heavy models and the DX180LC-3 mid-range model. 

Intermat will also see the launch of the new generation DL300-3, DL350-3, DL420-3, DL450-3 and DL550-3 large wheel loaders and the new DL200-3 mid-size wheel loader.  These will be shown alongside the company’s new DA30 and DA40 articulated dump trucks, which are being seen for the first time at the Intermat show.  

The new machines are powered by Scania selective catalytic reduction (SCR) or Doosan exhaust gas recirculation (EGR) diesel engines. Factory tests show a 5 to 10% reduction in fuel consumption, depending on the operating mode selected and the work being done.

The new excavators have 6% more cab space and new features, including direct control through the joysticks with proportional thumb wheel switches and integrated buttons, and a fuel consumption display.

New hydraulic pumps and valves increase hydraulic flow by up to 11% and pressure (350-370 bar) to boost front, travel and power functions as well asincrease lifting capabilities and reduce cycle times, Doosan says.

At 159kW, the Doosan DL08K engine in the DX300LC-3 excavator delivers 2% more power at a lower speed of 1800rpm than the existing DX300LC Stage IIIA model.  Compared to the DX340LC, the engine in the new DX340LC-3 delivers 210kW, a 7% increase in power at 1800rpm.

Workload/hour outputs have increased by an average of 6% and 17% across the different power modes in the DX300LC-3 and DX340LC-3 respectively, Doosan says.  In the DX300LC-3, a new travel device has increased the maximum travel speed to 5.3km/h, while drawbar pull is increased by 4% to 29,800kg. Lifting capacities have been increased by 6%. Maximum travel speed of the DX340LC-3 is raised 13% to 5.4km/h and drawbar pull is up 16% to 32,200kg. 

The DX180LC-3 excavator is powered by the Doosan DL06 6-cylinder turbocharged diesel engine meeting Stage IIIB engine emission regulations through the use of EGR and diesel particulate filter (DPF) after-treatment technologies.  The DL06 engine runs at 1950rpm and delivers 3% more power (91.2kW) and 15% more torque (54kgfm) than the engine in the existing Stage IIIA model. 

New loaders

The new generation DL300-3, DL350-3, DL420-3, DL450-3 and DL550-3 large wheel loaders have bucket capacities ranging from 3.0 m³to 5.5m³.

The DL300-3 and DL350-3 wheel loaders are driven by the 9-litre Scania DC09 SCR 5-cylinder diesel engine delivering a maximum power output of 202kW at 1800 rpm.

The DL420-3, DL450-3 and DL550-3 models are powered by the larger 13-litre Scania DC13 SCR 6-cylinder diesel engine delivering maximum power outputs of 264kW, 264kW and 283kW at 1800rpm, respectively. 

Powered by the Doosan DL06 EGR diesel enginedelivering 118kW at 2100rpm, the new mid-size DL200-3 wheel loader has a bucket capacity of 2m³.

The new wheel loaders have three engine working modes: Eco, Normal and Power, to adapt the machine to different applications, with different engine speeds and gear steps according to the working mode engaged. The Eco Bar provides information about fuel consumption in relation to machine performance in real-time, allowing the operator to select the driving profile for the best fuel efficiency.

All new generation Doosan wheel loaders are equipped with load-sensing controlled, variable hydraulic piston pumps for improved performance and reduced fuel consumption.  With load sensing, the hydraulic pumps receive a signal from the MCV informing how much oil is needed.

The new ZF limited slip Type II differential axles provide more durability and a longer lifetime, Doosan says. Rolling resistance for the axles is reduced, improving traction and decreasing fuel consumption.

New kinematics and a larger cylinder on the lift arm have allowed the main pressure in the front hydraulic system to be increased by up to 40 - 70 bar, depending on the machine size, with a corresponding increase in breakout and lifting forces of up to 5%.

New articulated dump trucks

The new DA40 articulated dump truck (ADT) offers a 10% increase in engine power compared to the previous MT41 model. Powered comes from a 6-cylinder Scania DC13 SCR engine with a gross power output of 368kW at 2100rpm.

With a 22% increase in gross torque to 2373Nm at 1300rpm, the torque available in the DA40 is ‘best in class’ in the ADT market, Doosan claims. 

Also contributing to an 8% reduction in fuel consumption is the new ZF transmission with eight forward and four reverse gears. Increased power and traction are both claimed and top speed is 58km/h (36mph).

The DA40 also has an increased body capacity of 24.4m³, and the payload has been boosted 15% to 40t without tailgate.

Replacing the MT31 model is the new Doosan DA30 ADT, which has a 28t payload and shares many features with the new DA40. The 5-cylinder Scania DC9 engine gives a gross power output of 276kW - 8% more than the MT31, and 30% more gross torque (1873Nm at 1300rpm).

 Specifications 

Got a story? Email news@theconstructionindex.co.uk