Doosan in action


UK’s First Flagship Doosan DL550-3 Loader at Camden Plant

Camden Plant Ltd, the leading recycled aggregate and topsoil supplier, based at Chingford in North East London, has purchased the UK’s first top-of-the-range Doosan DL550-3 Stage IIIB compliant wheel loader from Berkshire-based Promac Solutions Ltd, the authorised Doosan dealer for South East England.

The new DL550-3 wheel loader has replaced a previous generation Doosan DL500 wheel loader and joins Doosan DX380LC and DX225LC crawler excavators which were all purchased from Promac in 2010.

Serving clients primarily across North London, Hertfordshire and Essex, the principal activity at Camden Plant involves the recycling of construction and demolition (C&D) waste and supplying the products extracted from the C&D waste.  These include Type 1, 6F1 and 6F2 aggregates, recycled pipe bedding, road planings and gabion fill.  In addition, Camden Plant is a supplier of primary aggregates such as sand, ballast and MOT Type 1 aggregate.  The company also supplies quality topsoil at competitive rates.

Camden Plant is a long established privately owned business, the name of which recalls its early days as a plant hire company in Camden in North London, before the business moved to the current site in Chingford 20 years ago.  General Manager, Alan McNamara, has been with the company for the last 17 years.  He commented on the arrival of the new DL550-3 wheel loader:  “It is essential in our business that we have the best tools for the job to ensure we maintain consistency and quality in everything we do.  We ensure we have state-of-the-art equipment at all times and make sure we look after it well.  As a result, all of the plant and machinery we employ in our recycling processes are less than three years old and are regularly serviced in accordance with manufacturers' guidelines.”

Like all Doosan wheel loaders, the new flagship DL550-3 model has been designed to optimise fuel efficiency.  It is powered by the 13-litre Scania DC13 SCR 6-cylinder diesel engine delivering ‘best in class’ power and engine torque, with a maximum power output of 283 kW at 1800 rpm.  The high engine power output is combined with new ZF transmissions and several other features that, as well as minimising fuel consumption, provide exceptional performance, ease of handling, serviceability, durability and significantly enhanced operator comfort.

New kinematics and a larger cylinder on the lift arm have allowed the main pressure in the front hydraulic system to be increased by up to 70 bar, with a corresponding increase in breakout and lifting forces of up to 5%.  The lift arm has also been strengthened with 10% thicker metal in the arm and the tilt lever.

Alan McNamara added: “The increased loading capabilities of the DL550-3 wheel loader have proved very advantageous, allowing us to load lorries in just two passes rather than the three that are necessary with the smaller loaders conventionally used for this application.  This has greatly increased the turnaround on lorries which is a key feature for our business especially when we may have 40 or so lorries queuing to be loaded.”

Much of the material recycled at Camden Plant is obtained from the seven local boroughs in this part of North London, including that generated by council household waste recycling and highway operations as well as their term contractors.  Generally a certain amount of sorting has been done before it is brought to Camden Plant, but on arrival all loads are given a further check for their suitability for recycling.
Once waste materials have been accepted they are directed to the appropriate segregated Tipping Area from where they enter the recycling process.  For hard materials this involves the material being loaded by one of the Doosan excavators into a crusher which has been set to produce the appropriate sized recycled aggregates.  Soils are fed into a screener where soil and small stones are separated from larger stone and brick.  The topsoil is then stockpiled for sale to customers and the larger stone and brick is taken to be recycled with the other hard material.

In addition to loading lorries on site, the new DL550-3 large wheel loader carries out stockpiling work.  The loader has three engine working modes: ECO, NORMAL and POWER, to adapt the machine to different applications, with different engine speeds and gear steps according to the working mode engaged. 

With the ‘Power-Up’ function, the operator can manually adjust to the next highest working mode by applying a full stroke of the accelerator pedal.  With this function, the operator can travel in moderate NORMAL mode and switch to POWER mode when it is really needed, such as when taking material from a pile. This capability helps to further reduce fuel consumption.  The ECO Bar provides information about fuel consumption in relation to machine performance in real-time, allowing the operator to select the driving profile for the best fuel efficiency.

The DL550-3 model is part of the full range of Doosan products, including crawler and wheeled excavators, wheel loaders and articulated dump trucks available from Promac Solutions Ltd.  The company is the Authorised Dealer for the central Southern England region including London and the home counties, Kent, Essex, Berkshire, Buckinghamshire, Oxfordshire, Surrey, Sussex, Middlesex, Hertfordshire and Hampshire.  Promac is also the Authorised Bobcat Dealer for Hampshire, Berkshire, Oxfordshire and Buckinghamshire.

Promac operates from a purpose-built depot and showroom near Aldermaston in Berkshire, with easy access from the M4 and M3 affording excellent coverage of the South East of England.  Customers such as Camden Plant benefit from Promac’s well-established on-site service network, covering everything from emergency repairs to routine maintenance.   Promac's factory-trained engineers have many years of hands-on experience of repairs and servicing of heavy plant and machinery.  All the company’s service vans are fully equipped with workshop tools and extensive parts for on-the-spot service work.

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