Doosan Quarrying | The wheel thing

Doosan Quarrying | The wheel thing

Doosan is continuing its introducton of its DL-7 Wheel Loaders with the DL220-7 and DL250-7

The first phase of the ‘DL-7’ wheel loader range came in December 2020 and involved the launch of seven larger machines. Doosan Infracore Europe has now added the DL220-7 and DL250-7 units promising all the same features as for its bigger siblings, including Stage V compliant engines, enhanced productivity, increased fuel efficiency and a low cost of ownership, not to mention an improved experience for the operator. 

The DL220-7 and DL250-7 loaders have smooth and responsive hydraulics and auxiliary hydraulic connections. They are equipped as standard with a 3rd spool valve with settable flow and detent function, providing a constant flow for hydraulically driven attachments. A 4th spool valve is available as an option on both models. 

Operators can easily control hydraulic attachments via the proportional switch on the joystick, whilst various tyre options are also available to cover the widest possible range of conditions. In addition, the machines can be ordered with an optional 300kg counterweight, depending on the application. 

Doosan is also offering a wider choice of options to provide more work tools for a better match with applications, further increasing output. The standard bucket capacities on the DL220-7 and DL250-7 are 2.3 and 2.5 m3, respectively. 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. Both wheel loaders are available as HL versions featuring a high lift arm and the 300kg counterweight, where higher dump heights and increased versatility are required. 

Higher Performance
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.

The new wheel loaders have automatic 4-speed powershift transmission and Limited Slip Differential (LSD) axles as standard. Options include a 5-gear powershift transmission with Lock-up torque convertor and heavy duty HDL axles, providing enhanced traction with Differential Hydraulic Lock (DHL), especially in high-load environments. The differential hydraulic 100 per cent lock can be engaged at full torque automatically without any action from the operator. 

Improvements have been made throughout the powertrain, to provide operators with an 11 per cent increase in travel speeds up to a maximum of 40km/h.

The upgraded hydraulic system and major parts ensure greatly improved durability and maintainability. Providing increased peace of mind for the customer, the high reliability and quality of the new DL220-7 and DL250-7 wheel loaders are backed up by a standard full 3-year/5,000 hour warranty.

Power is provided by a new DL06V Stage V 6-cylinder engine, with an output of 119 kW (160 HP) and 128 kW (172 HP), respectively. With 5 per cent greater fuel efficiency than the previous generation machines, whilst delivering impressive output and torque, the powertrains meet Stage V emission regulations without the need for exhaust gas recirculation, through the use of selective catalyst reduction, diesel oxidation catalyst and diesel particulate filter after-treatment technologies. 

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 cab offers a greatly improved field of vision for the operator, with blind spots around the cab minimised and a 14 per cent larger glass window area compared to the previous DL-5 models. There’s also the option of electrically adjustable rear view mirrors for added safety. Full LED working lights are installed on the cab (two on both the front and rear as standard, with the option of four or 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 new 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 and on the gauge panel, which features a new layout and anti-reflective glass. 

The new EMCV (Electric Main Control Valve) joystick fully integrated in the armrest is another standard feature in the cab, providing the operator with smoother and precise controllability of the lift arm and attachments on the wheel loaders. Features available via the EMCV system include Automatic Return-to-Dig, Bucket Tilt Kick-out and the Bucket crowd stop position and shock prevention for higher operator comfort.

Using the new Doosan Smart Touch, the sensitivity of the ergonomic joystick control can be set and altered according to operator preferences. User-friendly and easy to read in all conditions, the new 8in. touchscreen provides all the important settings and information the operator needs in one place. The operator also has increased leg room, an enlarged storage area and cool-box position and an improved air conditioning system (with optimised air circulation). 

The wheel loaders are factory-installed with the latest DoosanCONNECT wireless fleet monitoring system, providing comprehensive information about machine performance.

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