Doosan Infracore Construction Equipment has launched the new DA40 articulated dump truck (ADT), the first in a new family of Doosan ADTs offering increased engine power and torque, higher payloads, lower fuel consumption, enhanced operator comfort and faster travel speeds.
Incorporating more than 40 years of expertise in the ADT market, the new Doosan ADTs are optimized for extreme performance. The agile undercarriage, designed to ensure that all six wheels are in permanent contact with the ground, means that Doosan articulated dump trucks can operate on very rough and soft terrain on construction sites such as road projects and mass excavation hauling as well as in mining and quarrying applications, according to the manufacturer.
Power, Performance, Productivity and Fuel Efficiency
Powered by a 6-cylinder interim Tier IV compliant diesel engine with a gross power output of 490 hp (365 kW) at 2,100 rpm, the new DA40 offers a 10-percent increase in engine power compared with the previous MT41 model. With a 22-percent increase in gross torque to 1750 lb. ft. at 1,300 rpm, the torque available in the DA40 is “best in class” in the ADT market.
Contributing to the overall 8-percent reduction in fuel consumption is the new transmission offering eight forward and four reverse speeds. The new transmission improves the transfer of power from the engine to the wheels for outstanding traction. To withstand the increased power, the driveline dimensions and cooling capacity of the truck have been increased.
The DA40 combines “best-in-class” fuel consumption with a higher top speed of 34 mph. The DA40 also has an increased body capacity of 34 cu. yds. (26 cu m), and the payload has been boosted to 44 tons (40 t) without tailgate, an increase of more than 15 percent over the payload of the MT41.
Six-Wheel Traction
The DA40 has permanent 6-wheel drive for equal power distribution while the free-swinging rear tandem bogie and the special articulation system offer enhanced driving performance in difficult terrain. The sloping body design enhances the stability of the truck due to its low center of gravity and allows fast and easy tipping, even in the most demanding conditions. The combination of the unique tandem bogie and the sloping rear frame results in “best in class” rough and soft terrain capabilities and avoids the need for aids such as traction control.
To handle the increased payload as well as provide a smoother ride for the operator, the DA40 has a completely new hydro-gas front suspension. This independent front suspension is a unique feature of the Doosan ADT, which allows for free movement on one side, without movement on the opposite side, providing maximum ground contact and shock absorption.
The articulation hinge is positioned behind the turning ring to provide equal weight distribution even during maximum turning and ensure maximum contact between the front wheels and the ground for optimum traction.
Like all Doosan ADTs, the DA40 features a powerful engine brake and hydraulic transmission retarder as standard. The wet brakes offer a long service life and sealed protection from the environment and, with oil-cooled multiple disc brakes on all the wheels, the safety of the operator is never compromised, according to the manufacturer.
Operator Comfort and Convenience
The DA40 has a completely new cab providing more space and improved visibility for the operator, “best in class” noise levels and a fully automatic climate control system. For easier operation, Doosan has introduced new electronic systems and simplified fingertip controls with a digital display of all desired machine functions. The fully automatic eight gear transmission and smooth Tiptronic gear-shifting (both automatic and manual gear functions are available) allow the operator to concentrate on working conditions.
For routine maintenance and service, the cab can be tilted backward to provide easy access to components. Easier service access and longer service intervals result in lower operating costs. A fully automatic central greasing system and rear view camera are standard.
For more information, www.doosanequipment.com.
This story also appears on Truck and Trailer Guide.
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