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Doosan wheel loaders for German sand and gravel operation

Germany’s J & E Horst GmbH & Co KG has chosen the Doosan DL420CVT-5 as the preferred wheel loader for its sand and gravel works in the Cologne region.

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Doosan wheel loaders for German sand and gravel operation

This follows an analysis of the performance of a new Doosan DL420CVT-5 wheel loader over the last year, which showed it provided the Horst team with a high level of efficiency combining high power and lower fuel consumption.

 

As a result, the company has purchased a total of three new DL420CVT-5s and has decided to replace all of the company’s current wheel loaders with DL420CVT-5s when they are phased out.

 

The DL420CVT-5 is the first model in the Doosan wheel loader range to be equipped with a Continuously Variable Transmission (CVT).A CVT transmission is the result of a permanent combination of hydraulic and mechanical technology to provide a smooth and continuous speed variation.

 

Doosan said the CVT design combines the benefits of a hydraulic mechanical transmission and a hydrostatic transmission in the same machine. It allows the DL420CVT-5 to automatically transition from hydrostatic power at low speed to the mechanical system to operate at higher speeds.

 

“By combining the two types of transmission, the new CVT technology ensures high loads can be carried at low engine speeds with high dynamics for an optimum wheel loader operating cycle,” the company explained.

 

“The DL420CVT-5 therefore provides an increase in machine performance for operators working in digging, loading and lifting applications.

 

“For most tasks, operators will utilise the hydrostatic part of the transmission, which offers greater fuel efficiency in low-speed applications. The combination of the two transmissions is automatic and fully transparent for the operator.”

 

The complete driving range, forwards and in reverse, is controlled by the CVT system, while low engine speeds ensure a high efficiency and the highest driving comfort irrespective of the traction speed.

 

“The power splitting continuously variable technology facilitates moving off softly and hydraulically. Furthermore, with the CVT, a fuel saving of up to 25% can be achieved,” said Doosan.

 

The ability to split hydrostatic and mechanical power has allowed Doosan to move to the Scania DC09 engine in the DL420CVT-5, as the CVT system maintains the machine’s efficiency even at low engine rpm. With an output of 232 kW (311 HP) of power at 1,800 rpm, the Scania DC09 engine provides generous torque at low rpm.

 

At the company’s three sand and gravel facilities, J & E Horst produces gravel and sand using both wet and dry quarrying methods. The Doosan wheel loaders are used in both the recovery and loading phases. A total of five Doosan loaders are currently in use at the various locations – including the three new DL420CVT-5s.

 

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