Doosan in action


William Thompson & Son Purchases Doosan Wheel Loader and Excavator for New Recycled Aggregate Operation

In Scotland, William Thompson & Son (Dumbarton) Ltd has purchased the company’s first Doosan wheel loader and crawler excavator for work on a new soil and aggregate recycling operation. Supplied by Coatbridge-based Scotia Plant Ltd, the authorised Doosan and Bobcat dealer for the central belt of Scotland, the new Stage IIIB compliant Doosan DL450-3 large wheel loader and DX255LC-3 excavator are working together feeding and stockpiling material for a new scalping screen.


Andrew Thompson, a Director at William Thompson & Son, said: “As part of our research into new equipment for the recycling operation at our site at Riggangower, we trialled a new Doosan DL420-3 wheel loader and our operators liked the design of these new generation Doosan machines.  They provide extra power for the lift and carry applications we are typically carrying out and they can cover the ground quickly and have the traction to easily negotiate haul roads.  We eventually purchased the larger DL450-3 model which has a high capacity bucket to further increase productivity.

“The new Doosan DX255LC-3 excavator is the right size for feeding the screen and loads it with CDR material produced by construction sites throughout the area and carried to Riggangower by our fleet of tipper lorries.  Riggangower is home to our operational landfill site, which is a former quarry from which we are able to recycle aggregates and soil from the overburden.  We are also using the new Doosan excavator equipped with a breaker for work in our nearby quarry at Sheephill.”


Optimised Fuel Efficiency

The DL420-3 and DL450-3 models are part of the new generation of Doosan Stage IIIB compliant large wheel loaders.  They are both powered by the fuel efficient 13-litre Scania DC13 SCR 6-cylinder diesel engine delivering ‘best in class’ power and engine torque, with a maximum power output of 264 kW at 1800 rpm.  SCR technology further reduces fuel consumption by about 10%.  This is combined with new ZF transmissions, with Torque convertor lock up from 2nd to 5th gear, load-sensing hydraulics, a temperature controlled fan and many other features, all of which combine to further optimise fuel efficiency. 

Reduced fuel consumption is also a key feature of the new 25 tonne Doosan DX255LC-3 crawler excavator.  Like the wheel loaders, in designing the new machine to meet Stage IIIB regulations, Doosan has gone much further, fully utilising the increased power available by creating an optimum balance between displacement and engine power to provide up to an 11% reduction in fuel consumption, a 13% increase in productivity and overall up to an 18% increase in the productivity/fuel consumption ratio.  The new DX255LC-3 excavator is powered by the 6-cylinder, turbocharged Doosan DL06K water-cooled diesel engine providing 138 kW (185 HP) of power at 1900 RPM.  The bucket breakout force is 17.9 tonne (ISO), while the arm breakout force is 12.8 tonne (ISO). 

Andrew Thompson added: “Our landfill and quarry operations are next to each other so we can provide a very efficient stone in and muck off service.  In a bid to reduce costs, many construction companies are looking to increase their use of recycled aggregates – hence our decision to expand this area of our business.  Though the virgin aggregate business continues to be very competitive, we have seen increased demand for products from our Sheephill quarry in the second half of 2013.”

Sheephill Quarry has been providing quarried whinstone, a form of basalt, for over 40 years.  There is a future reserve and planning consent to continue for more than 30 years at Sheephill, which can provide anything from armour stone to whindust, as well as Type 1, crusher run (various sizes); drainage stone (various sizes) and Gabion stone.  All stone is to highway specification.

Established in 1946 as a coal merchant in Dumbarton, William Thompson & Son is now a fourth generation family business with established links across the west of Scotland.  Through target marketing and continued investment, the company has become a market leader in quarry products in the west of Scotland.  Customers range from private individuals and local builders to national construction and infrastructure companies such as Balfour Beatty, Farrans, Jewson and Travis Keyline. 

Like all Scotia Plant customers, William Thompson & Son benefits from the dealer’s on-site service network, covering everything from emergency repairs to routine maintenance.  Scotia Plant’s trained engineers have years of experience of repairs and servicing of heavy plant and machinery and the company’s service vans are fully equipped with workshop tools and parts for on-the-spot service work. Genuine parts are readily available from the local Coatbridge facility.

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