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04 January 2018

Doosan launching DL420CVT-5 loader – first with CVT

First published03/01/2018
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Doosan DK420CVT-5 Wheeled loader
Doosan's new DL420CVT-5 wheeled loader Doosan is the first model in the Doosan wheeled loader range to be equipped with a Continuously Variable Transmission (CVT)

Doosan is launching its new DL420CVT-5 Stage IV compliant wheeled loader, the first model in the South Korean manufacturer’s wheeled loader range to be equipped with a Continuously Variable Transmission (CVT).  A CVT transmission is composed of a hydraulic motor combined with a hydraulic pump which provides a smooth and continuous speed variation.

The CVT design is said to combine the benefits of a 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 DL420CVT-5 therefore provides an increase in machine performance for operators working in digging, loading and lifting applications.

With a maximum bucket capacity of 4.2m³, the new Doosan DL420CVT-5 wheeled loader is intended to meet a wide range of material-handling needs from loading and transporting granular material (such as sand and gravel) to industrial, construction, demolition, mining and quarrying 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 DL420CVT-5 is said to offer up to 15% additional fuel savings compared to its predecessor. Like all new generation Doosan wheeled loaders, the unit also has a load sensing hydraulic pumping system, whereby the variable axial piston pump generates the flow upon demand in the amount necessary to perform the work. This also gives better traction for penetrating into the stockpile, as less force is necessary to operate the bucket in many situations.

The new Doosan wheeled loader features a high comfort cab offering generous headroom and ultra-comfortable, fully adjustable, heated Grammer air suspension seat. The DL420CVT-5 is also factory-installed with the DoosanConnect state-of-the-art wireless fleet monitoring system, a feature available as standard on Doosan wheeled loaders and now incorporated in all new DL-5 generation machines. The new DoosanConnect system is a tool designed specifically for the Doosan range, providing comprehensive information about machine performance in a dual mode (satellite, Mobile network). 

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