Doosan's New Articulated Dump Trucks
Doosan introduces two new articulated dump trucks (ADTs) for the 28-and 40-metric-ton weight class, offering improved performance and fuel efficiency, and increased reliability, serviceability and operator comfort. Doosan DA30-5 and DA40-5 ADTs have Tier 4 compliant diesel engines and feature improvements to the driveline, engine and cab for all-around operator ease of use.
The new 365-horsepower DA30-5 and 490-horsepower DA40-5 are powered by fuel-efficient Scania DC9 and DC13 diesel engines, respectively. The trucks have been configured with a high-pressure common-rail (HPCR) fuel delivery system as well as cooled exhaust gas recirculation (CEGR). Tier 4 compliant Doosan ADTs combine selective catalyst reduction (SCR) with a diesel oxidation catalyst (DOC) to reduce engine emission levels. Diesel exhaust fluid (DEF) is used with SCR technology and is stored in a DEF tank on the truck. The DOC transforms particulate matter (PM) emissions into harmless water and carbon dioxide. DEF is injected into the exhaust system to transform the nitrogen oxides (NOx) produced during combustion into water and nitrogen.
New to the DA30-5 and DA40-5 is a mass airflow sensor and exhaust brake, working in tandem to reduce emissions. The mass airflow sensor allows the electronic control unit to improve the management of airflow provided by the variable geometry turbocharger, and to optimize fuel delivery to the combustion chamber based on air intake volume and rpm. The exhaust brake helps to maintain consistent engine temperatures at lower engine speeds to improve operating efficiency. Consistent engine temperatures reduce harmful emission levels in the exhaust when the engine is running at lower rpms. Under normal operation, with high rpms, the exhaust brake is inactive.
Improved fuel efficiency
Following extensive hot and cold weather ADT testing with customers, which took place in 2013, the DA40-5 recorded an average of only 4.49 gallons an hour. The DA30-5 recorded an average of only 3.96 gallons per hour. Note: these results are operator and site specific.
Driveline improvements
The DA40-5 has a new bolt-on rear differential. The DA40-5 has improved gear ratios that provide reduced axle speed, improved component life, reduced vibration and lowered fuel consumption. It will replace the current one-piece rear axle. This design is a competitive advantage to further increase productivity and reliability, while reducing fuel consumption.
The new Doosan ADTs feature a front-mounted turning ring, a sloping rear frame, tandem rear bogey and independent front suspension. The tandem rear bogey delivers optimal traction with maximum ground contact in uneven terrain. Due to the tandem design, fewer points of power transfer mean less power loss and a more efficient driveline. All of these features to make sure the ADT maintains maximum ground contact and the best transfer of power to all wheels, allowing for reduced maintenance costs.
Enhanced cooling
DA30-5 and DA40-5 ADTs have an external engine intake air grille located on the truck hood’s right-hand side, providing cooler air to the engine intake improving engine efficiency. Plus, a new air vent helps prevent over pressurization in the engine compartment.
Increased cab comfort
Numerous design elements promote visibility from the cab. Standard heat and air conditioning, precise steering, ergonomic controls, high quality air-suspension seat, and low noise levels increase comfort when operating a Doosan ADT.
Simple service
A tilting cab gives service technicians excellent access to all of the truck’s major components. The cab can be tilted back in less than five minutes to expedite routine maintenance and repairs.
Find more information here.
PRO CONTRACTOR RENTALS MAGAZINE
Pro Contractor Rentals provides information of value to rental centers who focus time, resources and attention on meeting the demands of construction contractors and other equipment rental customers.
