Doosan Construction Equipment is launching new DA30-7 and DA45-7 Stage V compliant articulated dump trucks (ADTs). The new trucks replace the previous DA30-5 and DA40-5 Stage IV models. The DA30-7 has a payload of 28 t, while that of the DA45-7 is 41 t.
The DA30-7 is powered by the new Scania Stage V compliant DC09 9 l diesel engine, providing 276 kW (375 hp) of power. The DA45-7 is driven by the new Scania Stage V DC13 13 l diesel engine with an output of 368 kW (500 hp).
The new Scania engines have undergone two years of intensive testing in exacting construction and mining environments. Whilst the core of the Scania engines, which has been responsible for their exceptional reliability, has not changed, the main difference in the new engines from their predecessors is the improved after-treatment system.
In 2018, the DA30-5 ADT was upgraded with a range of features including a new cab, a new self-levelling front suspension, and a new tandem bogie system, which are all incorporated in the new DA30-7 Stage V model. A similar process has been applied in the new DA45-7 Stage V machine, with a new cab and a semi-levelling front suspension that adjusts itself independently depending on the operating conditions to ensure a comfortable working environment for the operator. The cabs on the ADTs have new comfortable hand grips and foot rests and an improved layout for the display, which is easier to use.
As well as these changes, the new models offer many more features, including a new design for the front frame and bonnet components on the trucks, created by the Doosan Design Team in accordance with the latest trends in the market. This reflects the high performance, power, and robustness of the range.
Together with the visual changes, there are also a number of functional changes on the ADTs, which improve safety, comfort, and serviceability. These include a new positioning of the diesel and AdBlue tanks. The latter are now much lower than before, allowing the operator to fill both tanks whilst standing next to the machine (‘ground level filling’).
The new ADTs are equipped with a real-time payload measuring system with a light indication for excavator operators, which will help them to place optimal loads in the ADTs to ensure productivity and low fuel consumption.
The greasing system has also been relocated to make it easily accessible from ground level. Space has been provided about the automatic lubrication system (which is standard) for additional grease cartridges and a filling pump.
In addition, the transmission filters have been installed close to the greasing system, where they are also easy to access. All of these systems are protected to ensure that any excess drops of oil/grease are collected and can be removed during service and maintenance. New improved maintenance access will also help operators to perform daily checks faster and more safely.
Both of the new machines are equipped with additional external round hand rails to prevent accidents and hazardous situations. Inside the cab, there is also a new additional grip on the right hand side for increased safety for the operator. The electronic and hydraulic systems in the new trucks have also been upgraded to offer improved performance with extended functionality and new technology.
The designs and developments in the new ADTs have resulted from intensive market analysis, customer visits, interviews with operators, and additional feedback gathered by the Doosan ADT Product and R&D teams at the company’s ADT plant in Elnesvågen, Norway. With all of these features incorporated, the new ADTs establish a unique benchmark in load carrying performance, fuel efficiency, enhanced controllability, and high operator comfort, together with improved reliability, durability, and reduced maintenance and servicing costs.
Like all of the company’s ADTs , the new models also feature an articulation hinge positioned behind the turning ring to provide equal weight distribution to the front axle even during maximum steer articulation. This, combined with a free-swinging rear tandem bogie, ensures equal distribution of weight to each wheel and guarantees permanent six wheel contact and drive for equal power distribution and good performance, particularly on difficult terrains such as soft ground, uneven surfaces, steep slopes, tight turns, or a combination of all of these difficult conditions.
Collectively, the forward turning point, the unique tandem bogie, and the sloping rear frame results in rough and soft terrain capabilities. The unique body shape and sloping frame ensure equal load distribution on all the wheels, making these machines the best haulers for soft terrain work. The design of the articulation also provides equal load distribution on the wheels on both the left and right hand side when turning, which is important for the traction and stability of the machines.
Read the article online at: https://www.worldcement.com/europe-cis/10092019/doosan-launches-new-articulated-dump-trucks/