In Scotland, East Dunbartonshire Council has purchased a special elevating cab version of the new Doosan DX140W-3 wheeled excavator from Coatbridge-based Scotia Plant Ltd, the authorised Doosan and Bobcat dealer for the central belt of Scotland. The first in the UK, the new DX140W-3 wheeled excavator is working at the Council’s Waste Recycling Centre and Transfer station at Mavis Valley in Bishopbriggs, north of the City of Glasgow.
Paul Curran, Fleet Manager for Development & Regeneration at East Dunbartonshire Council, said: “The new Doosan DX140W-3 excavator meets the required specification for the applications at the Waste and Recycling Centre and replaces a fixed elevated cab machine. In use constantly, the new Doosan excavator offers the durability and reliability required for work at the facility, which is open 361 days a year, from 8 am to 7.30 pm Monday to Friday and from 9 am to 6.30 pm on Saturday and Sunday. Our purchase decision was also influenced by good references we received and checked out for Doosan machines working at Inverclyde Council and in privately owned businesses in the area.”
Replacing the Stage IIIA machine introduced in 2006-2007, the new Doosan Stage IIIB compliant DX140W-3 wheeled excavator goes well beyond meeting the new emission requirements, offering several new features and product improvements. The new excavator is designed to reduce costs through better controllability and productivity while optimising fuel efficiency.
Increased operator comfort and convenience
The new ROPS and OPG certified cab on the DX140W-3 wheeled excavator offers more space for the operator, while a new cab suspension system helps to cut vibration by 20% and reduce the noise in the cab to as low as 70 dB(A). The cab features as standard a heated air suspension seat designed to reduce operator fatigue.
The joysticks have new proportional thumb wheel switches and integrated buttons to provide precise, proportional control of attachments. All functions can be controlled both from the instrument panel as well as via a new jog/shuttle control next to the joystick, a feature exclusive to Doosan excavators. As a standard feature, the operator has access to a new attachment select and setting function, with multiple recordable preset values.
Paul Curran added: “The improved controls provide advantages for use of the new grab attachment on the Doosan excavator for sorting and compacting materials for recycling. In addition, the elevating cab option provided by Scotia Plant provides our operators with excellent visibility for their work on the high-sided 50 yard containers we use at the Mavis Valley facility.”
All round visibility is further enhanced by an increased area of glass in the windows of the cab and lighting capability has been increased by 100% to facilitate working at night. Within the cab, a new 7-inch colour high quality visual control console offers an attractive display and excellent functionality.
Higher workload output
Compared to the previous model, workload per hour output on the DX140W-3 excavator has been increased by an average of 5% across the different power modes, whilst lifting capacities are up by 15%, a key feature for work at the Mavis Valley Waste and Recycling Centre. New hydraulic pumps and valves increase hydraulic flow by 4%. Increased hydraulic pressure boosts front and power functions, increases lifting capabilities, lowers cycle times and boosts breakout forces.
The swing torque has been increased by 4%, with both the bucket and arm digging forces rising by 7%. Overall, the new generation hydraulic systems improve the productivity of the machine through highly responsive, predictable controls.
Higher power and fuel efficiency
The DX140W-3 model is powered by the reliable Doosan DL06K 6-cylinder ‘common rail’ turbocharged diesel engine providing 101 kW (135 hp) of power at 2000 rpm. The DL06K engine meets Stage IIIB emission regulations through the use of EGR (Exhaust Gas Recirculation) and DPF (Diesel Particulate Filter) after-treatment technologies.
A new ECO Gauge on the control panel monitors in real time the rate of fuel consumption and actual engine-percent load to help guide the operator to select the best operating mode for fuel economy. Two new modes (P+ mode: Power Plus and L: Lifting) improve controllability and efficiency. Field tests show a 5 to 10% reduction in fuel consumption, depending on the mode selected and the work being done. Auto Idle and an electronic clutch to reduce unnecessary fan operation also contribute to fuel efficiency.