Doosan launch two new Tier 4 Final ADT models
New versions of DA30 and DA40 articulated dumptrucks to meet Stage IV/Tier 4 Final regulations
DOOSAN Construction Europe have introduced new Stage IV/Tier 4 Final versions of their DA30 and DA40 articulated dumptrucks (ADTs). As with all Doosan ADTs, the two new models feature an articulation hinge positioned behind the turning ring to provide equal weight distribution to the front axle even during maximum steer articulation.
This, together with a free-swinging rear tandem bogie, ensures equal distribution of weight to each wheel and delivers permanent six-wheel contact and drive for equal power distribution and optimum performance on difficult terrain.
Collectively, the forward turning point, the unique tandem bogie and the sloping rear frame are said to result in ‘best in class’ rough and soft terrain capabilities and avoid the need for electronic aids such as traction control.
The reduced fuel consumption of the new Doosan ADTs is achieved by a combination of features, including new Scania selective catalytic reduction (SCR) and exhaust gas recirculation (ECR) diesel engines, and new ZF EP transmission, which, collectively, improve the transfer of power from the engine to the wheels for superior traction.
The DA30 and DA40 ADTs are powered by Scania DC9 276kW (370hp) and DC13 368kW (493hp) diesel engines, respectively, meeting the Stage IV/Tier 4 Final emission regulations through the use of both SCR and EGR technologies, with an electronic engine brake system (one of four brake systems on the trucks).
The new ZF EP countershaft transmission provides eight forward speeds (top speed of 34 miles/h) and four reverse speeds. In the DA30 and DA40 models, the front differential is mounted directly on to the transmission, so there is no driveline that needs greasing and the overall length of the machine is reduced for better weight distribution and a tighter turning circle.
With smaller equal gear steps between gears, and a higher overall gear spread (eight forward gears), the transmission is designed to work optimally with the engine for better fuel efficiency.
The latest DA30 and DA40 ADTs have been tested with a new tracking and management system to be launched in the near future by Doosan, and have been shown to deliver reduced fuel consumption to provide an excellent cost per tonne transported. The tracking system provides full information on payloads, fuel consumption and cycle times.
Doosan say this is an improvement on the already excellent figures for the company’s Stage IIIB/T4i machines in operation around the world, which are claimed to have outperformed other machines on the market by up to 15% and, in some cases, have carried up to 10% more load.
On the DA40 model, for example, the body capacity has been increased to 24.4 cubic metres and the payload has been boosted to 40 metric tonnes without tailgate, an increase of more than 15% over the payload of the previous MT41 model from Doosan. In both the new DA30 and DA40 models, the higher speeds and payloads contribute to reduced cost-per-tonne rates, allowing customers to increase profits from their mining, quarrying or earthmoving operations.
Other key features of the Stage IV/Tier 4 Final machines include an upgraded display with an integrated gradient meter that shows the gradient of the dumptruck’s trailer, helping to ensure that drivers can safely dump their loads in all conditions.
Together with a new grill and larger cooling vents, the new DA30 and DA40 ADTs both feature increased cooling capacities, allowing the trucks to operate in temperatures as high as 60°C and above.