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| Contractors World International |
2012 Vol 3 No 9 | |
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LIBRARIES • back issues
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 PAGE 24 of 43 
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Doosan Launches It’s Largest, Most Powerful Wheel Loader - page 3 of 3 Like all new generation Doosan large wheel loaders, the DL550 is equipped with load-sensing, closed centre controlled, variable hydraulic piston pumps to improve performance and reduce fuel consumption. With load sensing, the hydraulic pumps receive a signal from the main control valve (MCV) informing how much oil is needed.
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 - as well as 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. 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 and increases operator comfort. ‘Return to dig’ positions can also be saved. The radiator fan is hydraulically driven. Changing the fan direction for cleaning the radiator can be done manually from the cab, without having to switch off the engine. A larger opening angle for the side door improves serviceability. The 90° swing-out fan with swing-out side doors provides easy access to the rear for cleaning the new one block radiator. Click here for more information >>> Doosan DL550 wheel loader |
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| PAGE 24 of 43
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Contractors World Magazines are published by VVV Limited Publisher: Roger Lindley Page updated: November 2012 |
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Durability and Serviceability
