Doosan launch Stage IIIB-compliant mini excavator
Doosan have launched the new generation DX85R-3 reduced tail swing (RTS) excavator to replace the company’s previous DX80R model.
The new DX85R-3 excavator is powered by a Yanmar 4TNV98C diesel engine providing 44.3kW of power at a rated speed of 2,100 rev/min, meeting Stage IIIB emission requirements through the use of exhaust gas recirculation (EGR) and diesel particulate filter (DPF) after-treatment technologies.
This new generation, reduced tail swing excavator goes beyond just meeting the new emission regulations and has been designed to exceed ‘voice of customer’ requirements by establishing a new benchmark for productivity, fuel efficiency, enhanced controllability and high operator comfort, together with improved reliability, durability and reduced maintenance costs.
Complementing the 10% increase in power over the DX80R model, the new DX85R-3 excavator offers improved fuel efficiency, said to be among the best in its class. The bucket digging force of 6.3 tonnes also represents an increase of 12% over the previous model.
The DX85R-3 excavator has a new load-sensing system that provides a guaranteed improvement in hydraulic performance and allows smooth and efficient combined operations. The traction force has also been increased by 7% to 6.6 tonnes, whilst travel speeds remain the same in both the low range (2.7km/h) and the high range (4.7km/h).
New cab
The new ROPS cab offers a lower noise level of just 71dBA. The space in the cab is similar to that found on much larger medium- and heavy-duty machines and the openness of the cab provides a wide field of view and good all-round visibility. The cab also has a large entrance and exit, giving good access for getting in and out of the machine.
The interior of the cab has been ergonomically designed to optimize operator comfort and features an increased foot rest area and an additional cup holder. 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 lumbar support. A seat heater is available as an option.
The DX85R-3 excavator is 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.
The cab is equipped with a new full-colour 5.7in LCD monitor that allows operators to control auxiliary flow and other functions such as monitoring service periods. The control panel provides comprehensive information about the status of the machine and anti-theft protection is fitted as standard through a password lock-out system.
Hydraulic flow control is enabled via roller software for control of auxiliary hydraulic flow (Aux1/Aux2), boom swing (offset) and tilting operations. In addition, auto down shift and dozer float levelling functions are all now available on the new model.
A high-capacity heating and air conditioning system is fitted as standard, with fully adjustable vents installed at both the front and rear of the operator's seat to maximize efficiency. Other standard features include an electric refuelling pump and a defroster for the windscreen.
Safety lock valves on the arm and boom cylinders and an overload warning device are all standard features and an optional rear camera provides an additional safety feature.
Easy maintenance
The advanced technology and powerful performance of the new DX85R-3 excavator are complemented by the simple, easy maintenance procedures required for the machine. Convenient check points make it easy to carry out routine maintenance, while a tilting cab simplifies service work.
The large-capacity radiator allows performance in severe and continuous operations. Access to the radiator and cooler is easy, making cleaning a simple process. Various parts of the engine can be accessed from the side, with the engine oil and fuel filter attached to the engine body extending out for easy maintenance.
The large capacity two-stage forced air cleaner removes over 99% of airborne particles, reducing the risk of engine contamination and lengthening the intervals for cleaning and cartridge change. Integrated grease piping is designed for easy maintenance of the swing bearing and swing cylinder. The fuse box is conveniently located in a section of the storage compartment behind the operator's seat. Sufficient space is also provided for easy adjustment or replacement of the fan belt.
