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Four decades later, Doosan ADTs are still an industry leader
Spring 2015
For 40-plus years in operation, Doosan articulated dump trucks (ADTs) have been called on time and time again to complete some of the toughest jobs — because of their optimal power, performance and technological advancements. Today, Doosan ADTs still hold true to those same features and functionalities with the new DA30-5 and DA40-5 models.
ADTs come to life
In 1970, Norwegian industrialist Birger Hatlebakk had the idea for producing a heavy-duty dump trailer drawn by a powerful tractor with rear wheels. And the first dump truck, a D20 powered by a 202-horsepower Scania D11 diesel engine, was born.
Two years later in 1972, Moxy bought the rights to the company’s first articulated dump truck, the Viking D15, featuring a bogie under the dump box and six-wheel drive. In 1974, production was moved from Molde, Norway, to a new facility in Elnesvagen, where Doosan ADTs continue to be built today.
In 1985, the first ADTs arrived in the United States, and that year the company released three new models — the 5222, 6225S and 6227S. During the 1990s, the company launched the MT30 and the MT40 models.
“The MT30 was the best-selling Moxy truck of all time due to, in fact, that the model was well-known for its ability to move and operate in difficult conditions such as wet, muddy and uneven terrains,” says Ove Hustad, ADT product service manager. Hustad worked at the factory and was one of the employees helping with final assembly when the first trucks bound for North America came down the line.
A landmark change happened in 2008 when Moxy was purchased by Doosan, changing the name to Doosan Moxy AS. This change expanded the Doosan product line and pinpointed the company as a top global construction equipment supplier. In 2012, Doosan celebrated 40 years since the permanent six-wheel-drive truck was produced. Two years later, in 2014, Doosan marked the 30th anniversary since the first Moxy ADTs arrived in North America.
Today’s Doosan ADTs
The most recent new model introduction, the DA30-5 and DA40-5, continues the legacy of delivering optimal power, performance and technological advancements.
The 362-net-horsepower DA30-5 and 483-net-horsepower DA40-5 are powered by Tier 4 (T4) compliant Scania DC9 and DC13 diesel engines, respectively. Ewen Gilchrist, Doosan ADT sales and marketing director, says the models offer improved fuel efficiency and are designed to deliver one of the lowest costs of ownership available in the market today. The new DA30-5 used approximately 4 gallons (15 liters) an hour while the DA40-5 recorded an average of 4.5 gallons (17 liters) during hot and cold weather testing with customers (note: these numbers depend entirely on the operator and application).
Improved operator comfort
Doosan ADTs have evolved by placing more emphasis on operator comfort and visibility, making them the best trucks for off-road hauling applications.
Design developments include:
- Standard heat and air conditioning
- Ergonomic controls
- Fully adjustable air-suspension seat
- Lowest noise levels in its size class
- Sloping hood
- Tilting and telescopic steering
- Cushioned dump cylinders
- Upgraded monitor panel
Enhanced design features
The new DA30-5 and DA40-5 were designed to provide improved operator control, says Gilchrist, especially with the new standard gradient meter. Two meter readings are visible on the 7-inch color LCD screen, including uphill / downhill shown as a percentage and sideways tilt shown as a degree value.
“Combine that with a sloping rear frame and forward-mounting turning ring, which allows the weight of the loaded body to be transferred forward, lowering the center of gravity,” Gilchrist says. “The free-swinging gear-driven tandem housing allows all wheels to maintain continuous ground contact over uneven terrain.”
This allows Doosan ADTs to excel in diverse applications — mass excavation, mines and quarries, sanitary landfills, road infrastructure projects and on-site building construction sites.
Unmatched serviceability
When operators need to service their Doosan ADTs, they find that each truck features a hood that opens 83 degrees, giving excellent access to the engine. Other serviceability features include:
A tilting cab to access the transmission and hydraulic components
Single rear-axle design with tandem gear-driven bogie
Three wear parts on the rear frame
Automatic lubrication system
After more than four decades of manufacturing durable and reliable articulated dump trucks, Doosan continues to listen to its customers to enhance the trucks, thereby improving operator productivity and truck performance.
