Doosan DL550 for MEA markets
Company’s largest and most powerful wheel loader launched in the Middle East and Africa
DOOSAN Infracore Construction Equipment has launched their new-generation DL550 wheel loader, the top-of-the-range model in the company’s new family of wheel loaders intended for markets in the Middle East and Africa (MEA).
With a bucket capacity of 5.4 cubic metres, the 31.5-tonne DL550 is designed to meet a wide range of material-handling needs from loading and transporting granular material to industrial, mining and quarrying applications.
A key feature of the new DL550 wheel loader is the Tier 2 12.7-litre Scania DC13 turbo-charged, air-to-air intercooled diesel engine, which is suitable for use in the Middle East and Africa, and delivers ‘best in class’ power with a maximum output of 294kW at 2,100 rev/min.
The new DL550 wheel 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.
The ECO Bar provides real-time information about fuel consumption in relation to machine performance, allowing the operator to select the driving mode for the best fuel efficiency.
The new ZF transmission improves the transfer of power from the engine to the wheels and contributes significantly to the overall reduction in fuel consumption. A five-gear transmission with torque convertor lock-up is available as an option.
When activated, the optional torque-converter-cut-off (TCCO) system is switched on automatically. This provides a direct mechanical connection between the engine and transmission without loss of power and torque by the torque converter. Tests show that fuel consumption can be reduced by as much as 10%.
The new ZF Type II axles provide more durability and a longer lifetime and have a hydraulic differential lock as standard. This function is engaged via the operator pedal or in automatic mode, depending on the torque resistance in first and second gear. The advantage of the hydraulic lock system is that it has less rolling resistance compared to the limited-slip system and causes less axle stress.
Like all new generation Doosan large wheel loaders, the DL550 is equipped with load-sensing, closed-centre controlled, variable hydraulic piston pumps for improved performance and reduced fuel consumption.
A new cab design features improvements both outside – such as better visibility due to a wider front glass section and an extended wiper blade area, better protection thanks to larger mud guards, improved hand rail and step designs and a new roof cover – and inside – such as the new instrument panel with integrated vehicle control unit (VCU).
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.
Changing the hydraulically driven radiator fan direction in order to clean the radiator can be done manually from the cab, without having to switch off the engine. Fan reverse intervals (30min to 2h) can be set via the menu. The 90° swing-out fan with swing-out side doors provides easy access to the rear for cleaning the new one block radiator.
The operator can set and monitor the time remaining to the next service. If the maintenance period is exceeded, a pop-up warning will appear. Increased space in the engine compartment ensures that components such as filters, valves and batteries are within easy reach for service work.
