New Doosan DX800LC-5B 80-tonne crawler excavator

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Designed to meet the needs of heavy-duty mining and quarrying applications as well as major infrastructure construction projects, the new 80-tonne crawler excavator DX800LC-5B from Doosan Construction Equipment had its premiere at Bauma 2019. This March at Conexpo 2020 in Las Vegas, Doosan unveiled its largest excavator yet for the North American market.

The long carriage (LC) design, in combination with the undercarriage expanded to its maximum working width, offers optimum stability and safety in all kinds of digging, lifting, and loading applications.

Contributing to the best-in-class productivity is the combination of a new 358 kW (480 HP) diesel engine and a comprehensive advanced and intelligent hydraulic system (ecoPower).

The DX800LC-5B incorporates an Electronic Control Unit which serves to optimize the performance of the diesel engine to achieve maximum fuel efficiency. The ecoPower technology builds on this by focusing on the role of the hydraulics system and demonstrates Doosan’s continuous iteration of all the processes and components used in the company’s products to achieve unprecedented levels of diesel energy efficiency.

Doosan’s ecoPower technology utilizes an electronic pressure-controlled pump within a closed center hydraulic system to accomplish increases in productivity and fuel consumption improvements. A closed centered main control valve minimizes pressure loss, while the electric pressure-controlled pump manages and optimizes engine power more effectively.

The ecoPower system uses sensors to detect the amount of hydraulic oil necessary to accomplish a specific task and precisely meter the amount of oil required rather than continuously forcing a fixed amount of oil through the system, thereby improving efficiency.

Software is utilized to electronically reproduce the full benefits of an open center hydraulic system with very little energy loss. The hydraulic system and engine horsepower are fully optimized and synchronized, further reducing losses within the system. This ensures that the high hydraulic flow of 1008 l/min from the hydraulic pump can be shared in the most efficient way, to produce the fast cycle times that are needed to achieve the highest productivity levels.

Like all Doosan excavators, much attention has been given to operator comfort and safety. The DX800LC-5B has a very spacious operator cab, equipped with ergonomic controls and instrumentation. Special attention has been given to keeping noise to a minimum by improved sealing of the engine compartment and extensive use of sound-dampening materials.

Enhanced safety features are intrinsic to the DX800LC-5B. Operators can be more productive and work more effectively at night with high quality LED work lights and an Around View Monitoring (AVM) system provides a 360-degree view from the cab.