Doosan Construction Equipment has launched the DX140LC-5, a 14 tonne crawler excavator which is part of the company’s new LC-5 range of machines meeting the latest Stage IV emission regulations. The DX140LC-5 model provides greatly improved performance compared to the previous LC-3 Stage IIIB model, and sets a new benchmark for this class of excavator worldwide.
The improved performance of the DX140LC-5 includes a 5% increase in engine power and 4% greater torque. In addition, traction has been boosted with an increase in drawbar pull of about 18% and front lifting capacity has been increased on average by 10% and side capacities are 12.5% higher. Complementing these figures, the fuel consumption in the DX140LC-5 has been lowered by 3% compared to the previous generation machine.
At the heart of the new DX140LC-5 is the Perkins 1204F engine, which combines reduced fuel consumption with the power and torque of larger engines with a smaller displacement. The new Perkins 1204F engine provides an output of 84.5 kW (113 HP) at 2000 rpm and uses an electronically controlled, high-pressure common-rail fuel system (2000 bar) – which reduces particulate matter emissions from the cylinder – and a waste-gate turbocharger.
The Perkins 1204F engine guarantees trouble-free operation by meeting Stage IV emission regulations without the need for a diesel particulate filter (DPF), through the use of cooled exhaust gas recirculation (EGR) and selective catalyst reduction (SCR) after-treatment technologies.
New systems and functions have also been incorporated which reduce fuel consumption. For example, the current fuel consumption can be read directly on the LCD panel, and the engine can be shut off automatically after a pre-set time when the machine is not being operated. In addition, to save fuel, Doosan has developed a special new system – called SPC (Smart Power Control) – to optimise the balance between the pumps’ output and the diesel engine.
Further fuel efficiency results from the electric fan clutch on the DX140LC-5 excavator which drives the cooling fan at optimum speed. Based on coolant, hydraulic oil, cooled charged air temperatures and target engine speeds, the fan speed is controlled electrically – resulting in much lower fan noise and better fuel efficiency.
For more information about Doosan construction equipment visit: www.doosanequipment.eu