Doosan introduces its next generation mini-excavator range.
The highest power and torque in their respective classes and the versatility to cover a wide range of applications. That what Doosan is promising for the four new machines added to its next generation mini-excavator range. Not only that but compatiblity with confined sites has been given careful thought. Of the DX27Z-7 2.8 tonne, DX35Z-7 3.9 tonne, DX50Z-7 5.4 tonne and DX55R-7 5.7 tonne Stage V compliant models, the first three feature a zero tail swing, whilst the DX50Z-7 benefits from a reduced radius design.
In addition, a platform design that features new upper structures has increased durability and robustness, which is complemented in all four new mini-excavators by a larger working range than other equivalent machines, coupled with higher lifting capacities and digging forces.
The DX27Z-7 and DX35Z-7 are powered by the Doosan D17 Stage V compliant diesel engine providing 18.4 kW (24.7 HP) of power at 2,400 and 2,200 rpm, respectively. The DX50Z-7 and DX55R-7 are powered by the Doosan D18 Stage V compliant diesel engine providing 36.4 kW (48.8 HP) of power at 2,200 rpm.
The DX27Z-7 and DX35Z-7 offer high hydraulic flows of 58 and 74 l/min. The DX50Z-7 and DX55R-7 also offer a high hydraulic flow of 80 l/min and, like the two smaller machines, this enhances work with attachments. A new EPPR valve is incorporated for two-way and optional rotating functions, that provides the operator with 10-step proportional control of the hydraulic flow rate via the thumbwheel joystick.
In all of these next generation mini-excavators, newly designed cast counterweights ensure what is described as excellent machine balance and stability when working. In the DX27Z-7 and DX35Z-7, long arm options are available for both models with 60 and 100kg additional counterweights included, respectively. An additional 200kg bolt-mounted counterweight option is available for the DX55R-7.
A larger, roomier cab maximises visibility with a full glass entry door. High luminance LED work lamps, with additional LED lamps available as an option, also improve the view of the work area. Other features include an enhanced heating/HVAC system (with AC optional in the DX27Z-7 and DX35Z-7), DAB Audio, 8in. Touch Screen for the DX50Z-7/DX55R-7, and a 5.7in. screen in the DX27Z-7 and DX35Z-7.
The HVAC system and the DAB Audio can be controlled through the 8in. touch screen and the feed from the optional rear-view camera can be displayed on both the 5.7 and 8in. screens. The monitors also show the flow rate setting, which can be controlled in 10 steps with the thumbwheel joystick.
The new mini-excavators incorporate a new dozer blade providing both a higher dozer lifting height and dozer digging depth. The machines also have a new dozer blade control lever.
Visibility and workability are improved by increasing the bucket protrusion distance beyond the tracks. Placing the boom swing cylinder on the left-hand side of cab allows the operator to work right up against walls and other structures on the right hand side of the machines. The fuel tank and boom swing cylinder have been positioned at the base of the cab, with the MCV now on the right side of the machine, improving visibility for maintaining and working on the MCV.
