Two new mini-excavators, the DX50Z-7 and DX55R-7, have been launched by Doosan with the company noting they are “the first in a new generation of machines.”
The DX50Z-7 is a 5.4 tonne machine, and the DX55R-7 a 5.7 tonne excavator. Both zero tail swing machines feature are powered by the Doosan D18 Stage V compliant diesel engine providing 36.4 kW (48.8 HP) of power at 2200 RPM.
These machines offer a high auxiliary flow of 80 l/min to enhance work with attachments. Newly designed cast counterweights ensure machine balance and stability when working. An additional 200 kg bolt-mounted counterweight option is available for the DX55R-7.
Both mini-excavators also feature a new larger, roomier cab, for operator comfort and controllability. The cab has a full glass entry door to maximise operator visibility on this side of the machine from inside the cab. The high luminance LED work lamps on the cab further enhance visibility and additional LED lamps are also available as an option. The cab also has an enhanced heating and air conditioning (HVAC) system, an eight inch touch screen and a USB Charger & 12V Socket.
The DX50Z-7 and DX55R-7 mini-excavators incorporate a new dozer blade and a new dozer blade control lever.
Using the dozer lever, the operator can select between low and high speed for the levelling blade hydraulics. Travel speed can also be selected by using the travel selector button on the dozer lever. When hydraulic oil pressure rises due to going up a slope while driving in the high speed mode, the travel speed auto-shift valve automatically resets the travel speed to low, to enhance the operator’s driving convenience and to reduce machine stress.
The dozer control also provides a new blade floating function – pushing the dozer lever all the way forward puts the lever into the detent position and leaves the dozer blade in a ‘float’ position. Customers can also choose the optional Dozer lock function, which prevents dozer blade creep. If the machine has the optional blade lock valve installed, the floating function will not work when the lever is in the detent position.
