Hydraulic performance boost for 6-tonners


TWO new generation 6 tonne compact excavators have been introduced by Doosan: The DX62R-3 reduced tail swing (RTS) and DX63-3 conventional tail swing models.

Designed as replacements for the existing DX60R and DX55E machines, the new models incorporate advances in many areas to maximise performance, versatility, operator comfort, durability, ease of maintenance and serviceability with minimum impact on human health and the environment.
One of the stand-out features on the new 6 tonne excavators is the dramatic increase in hydraulic performance, which has been boosted with an impressive 33% increase in maximum flow rate to 132 l/min. In addition, the hydraulic system now incorporates a load sensing system that guarantees high hydraulic performance and allows smooth and efficient combined operations. Two-way auxiliary hydraulic flow is also available for the primary auxiliary circuit for operating high flow attachments.
This is complemented by a significant increase in the digging forces – the bucket digging force is now 4.4 tonne, 7% above the previous models and the arm digging force is 10% higher at 2.9 tonne. This is combined with a longer arm for a better overall working range. The traction force has also been increased by 5% to 5.6 tonne and travel speeds have been increased in both the low range (2.6 km/h) and the high range (4.7 km/h).
The space available in the new ROPS operator cab is similar to that found on much larger medium and heavy-duty machines. The cab has a large entrance and exit, ensuring it is easy to get in and out of the excavators.
The cab offers a low noise level of 73 dBA. A high capacity heating and air conditioning system is standard, with fully adjustable vents installed at both the front and rear of the operator’s seat to maximise efficiency.
The interior of the cab has been ergonomically designed to optimise operator comfort and features an increased foot rest area and an additional cup holder, and the openness of the cab provides a wide field of view and excellent all-round visibility. The cab lighting, sun visor and side mirror all contribute to a safe and pleasant working environment for the operator.
The position and angle of the seat cushion as well as the position of the consoles can be adjusted to suit the operator. Additional comfort is provided by the seat back pocket and the lumbar support. A seat heater is available as an option.
Both new excavators are designed for easy, precise controllability with the left and right control stands ergonomically placed for convenient operation. The proportional hydraulic joystick levers have comfortable grips that allow the operator to perform smooth, precise actions.
There is a new full colour 5.7 inch LCD monitor that allows operators to control auxiliary flow and to monitor functions such as service periods. The control panel provides information about the status of the machine and there is anti-theft protection as standard.


Buckets – 0.069-0.175 m3
Operating weight – 6250 kg
Digging depth – 3815 mm/ 4115mm
Digging reach – 6230 mm/ 6525mm
Dump height – 4045 mm
Digging force over bucket – 4.4 t