The new generation DL200-3 and DL250-3 wheel loaders from Doosan Construction Equipment combine high engine power with a number of new features to minimise fuel consumption and provide better operator comfort, exceptional performance, ease of handling, easier serviceability and extended durability.
High operator comfort
The DL200-3 and DL250-3 wheel loaders feature a new cab design offering better visibility thanks to a wider front glass section and an extended wiper blade area. Now that the reservoir for the wiper water is located on the outside of the cab, space inside has been increased, providing more foot room. The air conditioning system is regulated automatically by a temperature sensor.
A new instrument panel has an integrated VCU (vehicle control unit). The control panel has been redesigned for more convenience, allowing the operator to choose the information they wish to have displayed. Using the Main Menu, the operator has access to several functions and machine information. Data such as pressure, temperature and engine speed can be monitored in real time. The operator and service staff are able to get detailed information via the Special Menu.
The cab has a new cool box compartment to keep cans and food fresh. There is also more storage room behind the seat.
Access to the cab is easier thanks to an improved hand rail and steps. The width and length of the mud guards have been increased to provide cleaner access to the cab.
Lower fuel consumption
The DL200-3 and DL250-3 are both powered by the Doosan DL06K ‘common rail’ 6-cylinder turbocharged diesel engine meeting Stage IIIB engine emission regulations through the use of Exhaust Gas Recirculation (EGR) and Diesel Particulate Filter (DPF) after-treatment technologies.
Three working modes – ECO, NORMAL and POWER – allow optimum fuel consumption for different applications. 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 feature, the operator can travel in NORMAL mode and switch to POWER mode when it is needed, such as when taking material from a pile. The ECO bar provides information about fuel consumption in relation to machine performance in real-time, allowing the operator to select the driving mode for the best fuel efficiency.
The operator can set a password for machine start. If Auto Idle is activated, engine speed goes down about 200 rpm after 10 seconds if there is no machine movement. Auto Idle is ideal for applications with longer waiting times, such as truck loading. Thanks to Auto Idle, fuel consumption is reduced by up to 8%.
Improved hydraulics and differential axles
Like all the new generation Doosan wheel loaders, the DL200-3 and DL250-3 models are equipped with load sensing controlled, variable hydraulic piston pumps, improving performance and reducing fuel consumption. With load sensing, the hydraulic pumps receive a signal from the MCV (main control valve) informing how much oil is needed. This helps to save on engine performance.
With the clutch cut-off system engaged, the driver is able to disconnect the transmission from the engine by operating the brake pedal in order to have 100% engine performance for the hydraulic system. As a result, movements are faster, breakout force is maximised and fuel consumption is reduced. The brake pressure for activation can be adjusted by the operator.
New ZF limited slip Type II differential axles provide more durability and a longer lifetime. Rolling resistance for the axles is reduced, improving traction and decreasing fuel consumption. As an option, customers can choose ZF axles with a hydraulic differential lock. This function is engaged via the operator pedal or in automatic mode, depending on the torque resistance in 1st and 2nd gear. The hydraulic lock system offers less rolling resistance than the limited slip system.
The radiator fan is hydraulically driven and controlled by the ECU (electronic control unit). Changing the fan direction for cleaning the radiator can be done manually from the cab without having to switch off the engine. Fan reverse intervals (30 minutes to 2 hours) can be set via the menu.
Durability and serviceability
On both wheel loaders, the lift arm has been strengthened with thicker metal in the tilt lever.
An automatic front control system allows the operator to save one low and one high position. The boom raise "kick out" function reduces cycle times. "Return to dig" positions can also be saved.
New kinematics and a larger cylinder on the lift arm have allowed the main pressure in the front hydraulic system to be increased, with a corresponding increase in breakout and lifting forces.
The SKF Vogel Auto Lubrication system, which improves the lifetime of the machine and increases operational hours for better productivity, is available as an option.
A larger opening angle for the side door makes it easier to service the machine. Swing-out side doors provide easy access to the rear for cleaning the new one-block radiator.
Increased space in the engine compartment ensures that components such as filters, valves and batteries are within easy reach for service work. 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.
As well as offering more standard features than other machines of their size on the market, there is an expanded choice of options for the DL200-3 and DL250-3 wheel loaders, including electric steering.
With bucket capacities of 2.0 and 2.5 m3, respectively, the DL200-3 and DL250-3 wheel loaders are intended to meet a wide range of material-handling needs from loading and transporting granular material to industrial, mining and quarrying applications.