Banner Contracts has replaced its long-serving S470LC with Doosan’s new DX520L crawler excavator, which is already impressing its new owner with greater output and savings of 100 litres of fuel a week.
Fuel savings of 100 litres a week from its new Doosan DX520L crawler excavator is an added bonus for Banner Contracts’ fleet, operating at Lafarge’s Thrislington limestone quarry at Ferryhill, Durham. The new DX520LC, supplied by Doosan dealer Construction Plant Suppliers, is a replacement for Banner’s long-serving Doosan S470LC.
Jo Banner, a director with Banner Contracts says the S470LC had put in some sterling work, but that the new DX520LC was needed to provide greater output. “Our output of crushed rock is governed largely by the rate the crushers can handle it,” he explains. “It is essential our prime mover, the new DX520LC, has the ability to ensure the crushers are always working to full capacity.”
The DX520LC is powered by Doosan’s DV11 six-cylinder common rail engine which has four valves per head and the firm’s Electronic Power Optimising System (EPOS) to ensure the 245 kW is used to maximum effect. EPOS is considered to be the brains of the machine and provides self-diagnosis to identify technical problems as well as monitoring maintenance and oil changing intervals.
Further economies come from a boom and arm flow regeneration system which stores the energy created by oil being pressurised as the boom and arm are lowered. Having captured the energy it is then available when the boom and arm are next raised.
According to Mr Banner, the records already show a good fuel saving. “The excavator works a 10 hour shift for five days a week. This equates to a saving of 100 litres of fuel a week or over 5,000 litres for the year which is an important saving for us,” he says.
When digging out the shot-blasted rock and loading it into the crusher/graders, Mr Banner says the operator prefers to set the machine in power mode as cycle times are quicker and the machine is smoother. “Output, which can amount to several thousand tonnes each day, is certainly more than enough to ensure the crushers’ insatiable appetite is always sated,” he concludes.