Doosan Construction Equipment has shown a prototype of its 6tonne DX62R-3, a replacement for the DX60R. Due to be launched in the second half of the year, the machine delivers a 33% increase in hydraulic flow from a new load sensing system. Digging forces are said to be greatly improved, with bucket force now up to 4,400kg, and increase of 7%, while dipper arm force is up to 2.9tonnes. This improved performance has been combined with a longer arm for a larger working range. The machine uses the same cab tha