The Doosan DA30-5 and DA45-5 represent the latest enhancements to articulated dump truck (ADT) performance, reliability, operator comfort and serviceability.
“We upgraded our previous Doosan DA40-5 articulated dump truck to a DA45-5 because the truck’s maximum allowable payload has increased to 45 short tons,” said Aaron Kleingartner, Doosan Infracore North America product and dealer marketing manager. “The trend with articulated dump trucks has moved to the larger payload capacities, particularly in the 40 ton and larger range. Trucks in this size class regularly operate on large construction sites or in mining operations, so the new, bigger DA45-5 will fit nicely in these areas.”
Self-Leveling Front Suspension
The front suspension of the new DA30-5 and DA45-5 has been updated to a hydro-gas, self-leveling system to provide superior performance and greater shock absorption. Combined, these suspension system features allow for a better ride and operator comfort, especially when the truck is driven while empty. The truck’s hydro-gas cylinders connect to pressure accumulators.
The accumulators and hydraulic system replace previous shock absorbers and a rubber spring. The updated suspension includes a self-leveling feature and the ability to change characteristics by adjusting the pressure. Also, the overall height of the front suspension can be changed by adjusting the suspension system pressure, which proves useful for lowering the transport height of the articulated dump trucks.
The unique design of Doosan articulated dump trucks – such as the tandem housing – sets the trucks apart from other ADT manufacturers. In the newest Doosan ADTs, common oil is used in the articulated dump truck’s wheel hubs, tandem rear bogie and limited slip differential.
The limited slip differential transfers the power to the left and right front wheels. The differential automatically provides the highest torque to the wheel that has the best grip. An oil-bathed gear box at the rear of the truck is free swinging to allow maximum ground contact of the wheels for the best traction, power to ground and stability.
Additional updates to the driveline include a new brake package for improved reliability and lower maintenance costs. Hardened steel bearings on the tandem bearing are now used in the manufacturing process, increasing the durability of the design. Updates to the grease distribution system enhance the bearings grease grooves to improve lubrication distribution and lower grease requirements by as much as 50%.
Payload Measuring System
Doosan DA30-5 and DA45-5 ADTs come standard with an active payload measuring system for increased productivity and reduced cycle times. The system provides ADT operators with improved truck management and load optimization by helping to protect against extensive overloading. Operators can view each load’s weight on the LCD screen in the operator cab.
An exterior traffic light-style indicator alerts excavator and wheel loader operators who are filling the ADT. They include three lights: red, yellow and green. Operators can easily identify how big the payload is compared to how the material is piling up in the truck. If the green light is illuminated, the truck is within the rate of payload. If the yellow light is illuminated, the operator is within 10% of the rate of payload. If the red light is illuminated, the operator has overloaded the truck for the allowed payload.
Doosan Infracore North America, na.DoosanEquipment.com