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Doosan dashes ahead

Amidst considerable anticipation, Doosan Infracore Europe has unveiled the new ‘DL-7’ wheel loader range.

In this first phase of the DL-7 range introduction, seven new models are being launched – the DL280-7, DL320-7, DL380-7, DL420-7, DL480-7, DL550-7 and DL580-7,  with four more models  – the DL200-7, DL220-7, DL250-7 and DL420CVT-7 being added in 2021.

The new DL-7 range is the culmination of the first complete redesign of the Doosan wheel loader range in 10 years, with the exterior design, in particular, undergoing a complete transformation. The new external design has been applied to all models in the DL-7 series as a family look, creating a three-dimensional effect with an innovative cover shape and a vibrant, dynamic image for the range. It has already received great acclaim globally, winning Germany’s 2020 iF Design Award, one of the world’s top three design awards and the ‘Best of the Best’ category in the Korean PIN UP Design Awards.

Redesigned buckets offering up to seven percent more capacity ensure the seven new Doosan DL-7 wheel loaders provide easier and faster loading with maximum bucket capacities from 2.8 to 6.4 m3. This provides increased productivity for a very wide range of material-handling applications.  

The Z-kinematic lift arm delivers high breakout forces and lifting capacities, especially for heavy materials, and a large dump angle for efficiently unloading sticky materials. An optional high lift arm is available where higher dump heights and increased versatility are required.

The DL-7 loaders also have smooth and responsive hydraulics and auxiliary hydraulic connections. All of the new DL-7 wheel loaders are equipped as standard with a 3rd spool valve with settable flow and detent function, providing a constant flow for hydraulically driven attachments. Operators can easily and comfortably control hydraulic attachments via the proportional switch on the joystick. Various bias and radial tyre options are also available from leading global manufacturers, to cover the widest possible range of conditions and applications.

In addition, the new wheel loaders can be ordered with a choice of different counterweights – options include 300, 400 or 500 kg depending on the application.

The new cab offers a greatly improved field of vision for the operator, with blind spots around the cab minimized and a 14 percent larger glass window area compared to the previous DL-5 models. The DL-7 wheel loaders also offer the option of electrically adjustable rear view mirrors for added safety. Full LED working lights are installed on the cab (four on both the front and rear as standard, with the option of six each at the front and rear). For higher pedestrian safety, the LED lights on the rear bonnet have an automatic strobe function to indicate when the wheel loader is reversing.

Inside the cab, the DL-7 wheel loaders offer significantly enhanced operating comfort, an enhanced steering system and advanced electronic controls. Using the new Doosan Smart Key system on the control panel in the cab, the operator can start the machine using a keyless device, helping to prevent machine theft. The Smart Key system provides remote door control, door lock and unlock, door release, searching and other functions. The control panel also includes two USB sockets.

The new cab has a Grammer Actimo XXL seat with fully adjustable horizontal and vertical suspension settings, a pneumatic lumbar function and seat heating as standard. There is a 3-point safety belt with alarm icons on the new Doosan Smart Touch 8 inch touchscreen monitor and on the gauge panel, which features a new layout and anti-reflective glass.

The LIS (Load Isolation System) provides a smoother ride and higher comfort for the operator, as well as higher productivity due to improved stability when the wheel loader is moving. The lift arm is cushioned by a hydro-pneumatic accumulator linked to the lift hydraulic system, acting as a shock absorber. The benefits include reduced cycle times, higher performance and better fuel efficiency while carrying out load and carry applications.

With automatic 5-speed powershift transmission, heavy duty HDL axles as standard and enhanced traction with Differential Hydraulic Lock (DHL), the DL-7 wheel loaders operate exceptionally, especially in high-load environments. The differential hydraulic 100 percent lock can be engaged at full torque automatically without any action from the operator.

Optional independent oil cooler circuits for the front and rear axle ensure low oil temperatures, provide oil filtration and extend the lifetime of axle components, especially for demanding applications, such as long distance load and carry in high ambient temperature conditions.

Improvements have been made throughout the powertrain, to provide operators with best-in-class driveability and faster driving, reaching the 40 km/h maximum speed quickly and safely.

With power provided by new Doosan and Scania Stage V 6-cylinder engines, the DL-7 wheel loaders provide up to five percent greater fuel efficiency than the previous generation machines, whilst delivering impressive output and torque.

The new engines meet Stage V emission regulations without the need for exhaust gas recirculation (EGR), through the use of selective catalyst reduction, diesel oxidation catalyst and diesel particulate filter (DPF) after-treatment technologies. The soot cleaning cycle on the DPF has been improved to over 6000 h and the operator is fully informed about the status of the DPF via a soot level indicator on the new touchscreen display in the cab.

The Doosan Smart Guidance System (DSGS) is a new feature which analyses the driving habits and behaviour of the operator and helps them to achieve the most fuel-efficient operation. The DSGS provides a score and guide (the Score-Graph) of the operator’s driving pattern to show fuel economy, efficiency and durability by category.

The new Doosan wheel loader family will be the subject of discussion in tonight’s episode of Diggers and Dozers LIVE. The show starts at 6.30pm.

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