Doosan has unveiled upgrades to two of its six-tonne excavators and will launch a new version of one of their eight-tonne machines before the end of the year.
The six-tonne DX63-3 will take the place of the DX55E and the reduced tail swing model, the DX62R-3, replaces the existing DX60R.
They are both powered by the Stage IIIA-compliant Yanmar 4TNV94L diesel engine and launch in September.
The eight-tonne DX85R-3 is likely to be introduced at the end of the year or in early 2014 and will replace the DX80R. The new version includes a Yanmar 4TNV98C diesel engine meeting Stage IIIB emissions requirements.
Doosan claims the new eight-tonne excavator is 10 per cent more powerful than its predecessor and its bucket digging force of 6.3 tonnes is 12 per cent greater than the previous model. Its traction force has also been increased by 7 per cent to 6.6 tonnes.
Meanwhile the new six-tonne model’s hydraulic performance boasts a one-third increase in flow rate compared with its predecessors, the firm says, taking the maximum flow rate to 132 litres/minute.
The bucket-digging force of the six-tonne machines have also increased by 7 per cent to 4.4 tonnes, while the arm-digging force is 10 per cent higher at 2.9 tonnes. Traction force has increased by 5 per cent to 5.6 tonnes.
Doosan business development manager Kevin Lynch expects a further rise in demand for the new excavators on the back of growth in housebuilding.