The new model has also designed to be more rugged and comfortable than before, as well as compliant with Stage IIIB emissions requirements.
The undercarriage, boom and arm have been made more robust, extending mean time before failure by more than 30%, Doosan claims.
The new ROPS and OPG certified cab 6% offers more space (+6%) for the operator. New features include proportional thumb wheel switches on the joysticks to control attachments and a 7-inch colour control console. All functions can be controlled from either the instrument panel or a new control next to the joystick. A new function allowing the operator to select and set engine speed, hydraulic flow and pressure for attachments, with several preset positions, is a standard feature.
The air suspension seat is heated and a new cab suspension system helps to cut vibration by 20% and reduce the sound level in the cab to 71 dBA. The cab is also pressurised to prevent particles from entering the cab.
The DX300LC-3 is powered by the Doosan DL08K ‘common rail’ 6-cylinder turbocharged diesel engine meeting Stage IIIB emission regulations through the use of exhaust gas recirculation (EGR) and diesel particulate filter (DPF) after-treatment technologies. At 159kW, the engine delivers 2% more power at a lower speed of 1800 rpm than the existing DX300LC Stage IIIA model, Doosan says. Factory tests show a 5% to 10% reduction in fuel consumption, depending on the operating mode selected and the work being done.
A new ECO Gauge on the control panel helps the operator to lower fuel consumption by providing real time monitoring of fuel rate and actual engine-percent load. Two new operating modes (P+ mode: Power Plus and L: Lifting) improve controllability and efficiency.
Workload/hour outputs have increased by an average of 6% across the different power modes in the DX300LC-3. A new travel device has increased the maximum travel speed to 5.3km/h, while the drawbar pull is increased by 4% to 26,200kg and lifting capacities have been increased by 6%.
New hydraulic pumps and valves increase hydraulic flow by up to 11% and pressure (350-370 bar) to boost front, travel and power functions as well as increase lifting capabilities and reduce cycle times, it is claimed.