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Fuel efficiency is the focus

Q: What is your product?

Doosan Infracore Construction Equipment’s new generation DL300-3, DL350-3, DL420-3, DL450-3 and DL550-3 large-wheel loaders.

Q: Where would one ideally be used?

With bucket capacities of 3-5.5cu m, the Doosan loaders can meet a wide range of material handling needs.

Q: How are they different?

Selective catalytic reduction technology reduces fuel consumption by about 10% compared with similar-size machines that use exhaust gas recirculation technology.

Q: What are the benefits?

The loaders are equipped with load-sensing controlled, variable hydraulic piston pumps, which help to improve performance and reduce fuel consumption. The pumps receive a signal from the main control valve informing how much oil is needed, which saves on engine performance.

Pressure, temperature and engine speed can be moni-tored in realtime on a new style of display inside the cab.

Q: Cost?

Prices are available from local dealers, but it is competitively priced against similar models.

Q: Any savings?

The loaders have three engine working modes, eco, normal and power, which adapt the machine to different applications, engine speeds and gear steps.

The operator can travel in normal mode and switch to power mode when needed, such as when taking material from a pile. Fuel consumption information on the instrument panel allows the operator to select the driving profile for the best fuel efficiency.

Economy or eco mode is for work such as standing on sites.

Q: What about lifespan and durability?

All Doosan new generation large-wheel loaders have as standard the SKF Vogel Auto Lubrication system, which increases operational hours and extends lifetime by providing continuous lubrication.

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 40-70 bar, with a corresponding increase in breakout and lifting forces of up to 5%.

Q: What about maintenance?

A larger opening angle for the side door improves serviceability. Increased space in the engine compartment ensures that components are within easy reach for servicing.

Q: How is it future-proofed?

Resale is better for these models because you can replace its stage IIIB engine (according to the new engine emission regulations) with a Stage II engine for resale to emerging markets such as the Middle East and Africa.

Using less fuel

The ZF 5-gear transmission improves transfer of power from the engine to the wheels, and contributes to a reduction in fuel consumption.

The change from four to five gears provides better response and acceleration, especially on slopes.

Engine speed variation is less thanks to smaller gear steps. Lower engine speed throughout the whole drive range reduces fuel consumption.

  • Answers supplied by Doosan. For details visit:
  • To share your news or take part in these features, email page editor Katie Coyne at

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