Risa AS, one of Norway’s largest construction contractors, has purchased nine new Doosan DA30-5 Stage IV/Tier 4 Final compliant articulated dump trucks (ADTs) from Rosendal Maskin AS, the Doosan and Bobcat dealer for Norway, based in Askim. 

Founded in 1948, Risa has a staff of over 450 skilled and experienced employees, offering  extensive knowledge and expertise in the development of infrastructure, housing, industrial and road maintenance projects.  The company’s business is mostly focused in the west coast region of Norway, in the counties of Rogaland, Agder and Sunnhordaland.

Risa purchased the company’s first DA30-5 ADT in 2014 and following successful tests of its performance against the equipment the company was using at the time, this was followed one year later by the acquisition of two more DA30-5s which were delivered during Spring 2015.  This year Risa has taken delivery of two more DA30-5 machines, which arrived at the end of June and has placed a new order for seven more units which will bring the total of DA30-5 in the company’s fleet to 12.  Risa also has a fleet of five Bobcat mini-excavators purchased from Rosendal.

Roy Haaker, Product Line Director for the Doosan ADT and wheel loader ranges in Europe, said:  “We are very pleased to win this new order from Risa, based on the excellent experience they have had with our machines and the fantastic feedback on performance, uptime, easy operation and reduced fuel consumption, which has all contributed to more orders for our trucks.”

Jan Roger Lindseth, Sales Support Manager at the Doosan Infracore Norway manufacturing plant at Molde where the Doosan ADT range is produced, said:  “We are delighted by the commitment provided by Doosan Bobcat EMEA and the role of our dealer, Rosendal, in winning back market share in Norway and elsewhere in Europe.  It is of course very satisfying that we have the big contractors coming back to us to place new investment after testing out our new generation machines and the excellent service, up-time and low operation costs we offer ensure that these companies continue to purchase their products from Doosan.”

Like all of Doosan’s new Stage IV/Tier 4 Final machines, the design of the DA30-5 ADT goes far beyond just meeting the latest emission standards and incorporates many additional features and product improvements to establish a new benchmark in performance, fuel efficiency, enhanced controllability and high operator comfort, together with improved reliability, durability and reduced maintenance and servicing costs. 

The ‘best-in-class’ fuel consumption of Doosan ADTs is down to a combination of features including a new Scania diesel engine and a ZF EP transmission, improving the transfer of power from the engine to the wheels for outstanding traction.  When this is coupled with the enhanced rear differential system which reduces engine rpm and further increases machine durability, customers are ensured of an improved cost per tonne carried with the Doosan ADT range.

Specifically designed by ZF for use on ADTs, the ZF EP countershaft transmission provides eight forward speeds [with a top speed of 55 km/h (34 mph)] and four reverse speeds.  In the DA30-5 model, the front differential is mounted directly onto the transmission, so there is no driveline that needs greasing and reducing the overall length of the machine 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 works optimally with the engine for better fuel efficiency.

The Doosan DA30-5 is powered by the Scania DC9 276 kW (370 HP) diesel engine, meeting the Stage IV/Tier 4 Final emission regulations through the use of both Selective Catalytic Reduction (SCR) and Exhaust Gas Recirculation (EGR) technologies, with an electronic engine brake system, one of four brake systems on the trucks.  Doosan’s Stage IV/Tier 4 Final ADTs do not need a diesel particle filter (DPF) to meet the emission regulations.

Like all Doosan ADTs, the DA30-5 features 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 guarantees permanent 6-wheel contact and drive for equal power distribution and excellent performance on difficult terrain.  Collectively, the forward turning point, the unique tandem bogie and the sloping rear frame results in ‘best in class’ rough and soft terrain capabilities and avoids the need for electronic aids such as traction control.

Rosendal Maskin AS was established in 1986 and is a family-owned business with 45 employees and a nationwide network of sales and service points in Norway.  Over its 30 years of business, Rosendal has delivered well over 2500 construction machines for the Norwegian market.