The DX480LCA ... extra reach.
Doosan extends its large crawler range
01 March 2013
DOOSAN Construction Equipment has launched two new crawler excavators in its new LCA generation targeted at the region’s market.
The 48-tonne DX480LCA and 51-tonne DX520LCA large crawler excavators for markets in the Middle East and Africa (MEA) are the latest in a range of the new LCA generation of Doosan crawler excavators replacing the previous Solar range. Last year the new DX225LCA, DX300LCA and DX340LCA models were introduced while the complete range is expected to be launched by the year-end.
“The DX480LCA is a very powerful machine with extra reach and stability, allowing it to accomplish long cycles and heavy pulling work with ease,” says a company spokesman. “The DX520LCA, on the other hand, offers exceptional stability and unmatched lifting capabilities. This is a mass excavation machine fitted with an extra heavy counterweight and a short front end to deliver more breakout force for really tough digging jobs.”
Both new excavators are powered by the Doosan DE12TIS six-cylinder air-to-air intercooler Tier II compliant diesel engine with a displacement of 11 litres, developing 238 kW (318 HP) of power at 2,000 rpm using a mechanical injection system. The latter ensures the engine provides both maximum power and greater torque, while at the same time reducing emissions. Owing to the incorporation of a new travel motor, both machines deliver a massive tractive effort of 37.6 tonnes. Bucket and dipper stick breakout forces have also increased, together with a significant increase in the hydraulic flow from the pumps to two by 360 litres per min.
 |
The E16 compact excavator ... enhanced. |
All the LCA new generation machines share a common design particularly suited to the specific needs of the MEA markets, combining high robustness with a number of important new functionalities and technical improvements.
The operating weight of the new DX480LCA excavator varies from 48.4 to 50.2 tonnes, depending on the configuration while that for the DX520LCA varies from 51.1 to 52.9 tonnes.
In its standard configuration, the DX480LCA model offers a bucket capacity ranging from 1.71 to 2.86 cu m, a maximum digging depth of 7,810 mm, digging reach of 12,120 mm and digging height of 11,080 mm. The standard version of the DX520LCA excavator offers a bucket capacity from 0.93 to 3.6 cu m, a maximum digging depth of 6,770 mm, reach of 10,750 mm and digging height of 9,600 mm.
Selected via the new LCD colour display panel in the cab, a choice of three operating modes is available for the new excavators: power, standard and the economy mode, allowing the operator to match the output to the work being carried out, ensuring a considerable reduction in fuel consumption. In combination with these work modes (P/S/E), the new EPOS controller ensures a perfect interface and adjustment between the engine and hydraulic output that optimises productivity and also significantly reduces fuel consumption.
Elsewhere in the cab, the space for the operator has been substantially increased, while the comfort, seat and joystick controls have all been improved. All LCA machines are available as standard with a new automatically adjusting air-conditioning system offering a 20 per cent greater cooling capacity with five aeration modes. The cab also offers as standard a sun screen and several storage compartments, including a lockable box which can be heated or cooled for food and drinks.
For increased visibility, the thickness of the lateral supports at the front of the cab has been reduced and the windscreen wiper now folds back behind the right console to ensure the operator always has optimum visibility to the front when working. The side, rear and roof windows have all been greatly enlarged to further enhance visibility.
To match the increased performance and productivity, particular attention has been given to reinforcing the front work group with thicker steel and additional reinforcement plates, increasing reliability and durability.
Wide steel doors provide full protection for the pump and radiator compartments at the same time as ensuring excellent access for maintenance. Greasing intervals has been optimised by utilising reinforced bushings and shims, whilst maintenance intervals have been increased through the installation of the latest generation filters.
Compact excavators
Meanwhile, Bobcat – another brand of workhorses from the Doosan Infracore stable – is offering enhanced versions of its popular E14 1.4-tonne and E16 1.6-tonne compact excavators.
Building on the high reliability and durability, exceptional operator comfort and powerful performance of the previous machines, the new E14 and E16 ‘facelift’ models feature several new characteristics and options that will further increase operator comfort, new high-quality components and engineering and an updated exterior styling that aligns these models with the rest of the E-Series compact excavators.
Both the machines are powered by the three-cylinder 9.9 kW Kubota D722 engine. High digging performance is enhanced by the stability provided by the dozer blade and the low centre of gravity of the machines.
Featuring as standard a retractable undercarriage, the excavators offer smooth responsive hydraulics enabling precise movements and fast cycle times. Thanks to their compact size and light weight, both the E14 and E16 can be transported on a trailer towed by a small truck, van or even a mid-size passenger car.
The spacious cab on the enhanced E14 and E16 models offers a large door width which, together with the low position of the superstructure, provides easy access to the cab. Inside, the most important improvements are the new ergonomic travel levers and pedals that have proved successful on the larger E26 excavator model. The cab also incorporates as standard a new floor mat and internal liner.
The E14 has an operating weight of 1,500 kg and offers a maximum digging depth of 2,301 mm. The E16 offers a choice of dipper sticks: the one with a standard dipper stick has an operating weight of 1,744 kg and offers a maximum digging depth of 2,422 mm, while the unit with the long dipper stick has a maximum digging depth of 2,602 mm.
Both the E14 and E16 excavator models have the ‘cylinder-over-boom’ design. Since the cylinder is mounted on top of the boom, it is protected when working in tight spaces or with attachments. The oversized diameter of the cylinders enhances the breakout forces and lifting capacities of the machines. Picking up and placing heavy objects is therefore easy with either excavator model as the E14 can lift more than 300 kg whilst the larger E16 can lift more than 350 kg.
The auxiliary hydraulic lines and workgroup hoses are mounted inside the boom and arm for optimal protection and enhanced visibility. Attachments, which include a range of different-sized digging and trenching buckets, grading buckets, hydraulic breakers, augers and the hydraulic clamp, can be easily mounted.
