January 2016 Vol. 71 No. 1

New Products

Doosan Brings Hydrostatic Drive System To Wheel Loaders

The new Doosan DL200-5 and DL200TC-5 (tool carrier) are the first wheel loaders from Doosan to feature a hydrostatic drive system in place of a traditional torque converter transmission. The wheel loaders replace the -3 models and transition from an interim Tier 4 to Tier 4-compliant diesel engines. They offer fuel efficiency, operator comfort, and serviceability and reliability improvements.

Customers can choose between two lift-arm designs; the 142-net-hp DL200-5 wheel loader is built with a standard Z-bar lift-arm linkage system, which is ideal for digging, heavy lifting and general construction jobs. The DL200TC-5 wheel loader has a parallel lift linkage system to assist operators in keeping the load level through the entire lift cycle. Both new machines have a 2.6-cubic-yard bucket capacity.
The hydrostatic drive system offers several advantages over the traditional torque converter transmission including improved fuel efficiency, enhanced machine positional control to increase productivity and reduced wear on the brakes as dynamic breaking slows the wheel loaders.

Operators can choose between three power modes which adjust the maximum engine RPM. Unlike the former traditional transmission, the engine RPM is not directly linked to the machine’s travel speed, so the maximum travel speed remains unaffected. The machines also provide superior power and performance in tough conditions and truck-loading tasks; balance fuel consumption for everyday digging, grading and lifting tasks; and reduce fuel consumption for low-demand applications.

The traction control management of the Doosan DL200-5 and DL200TC-5 wheel loaders allows operators to easily adjust traction force to match jobsite conditions, reducing wheel slippage for efficient operation in digging, stockpiling and loading applications.

The new speed management feature on the two machines allows operators to obtain full-engine RPM for optimal lift arm or hydraulic attachment performance, yet fine tune the maximum Doosan also added an auto-shutdown system to the two new wheel loaders to assist owners and operators in saving fuel during non-working conditions – operators can configure the idle time before auto shutdown.
The cab improvements for the DL200-5 and DL200TC-5 include heated mirrors, a sun visor and an optional rearview camera, which is visible from the LCD screen and provides a view of the machine’s rear surroundings.

Additionally, improved serviceability and simple attachment changes, the new wheel loaders from Doosan are fine-tuned for any jobsite and easy maintenance. The machines meet the Tier 4 emission requirements without the need for a diesel particulate filter, and both are optimized for use with a high-pressure common-rail (HPCR) fuel delivery system and a cooled exhaust gas recirculation (CEGR) system. The new wheel loaders also feature a wastegate turbocharger (WGT) and selective catalytic reduction (SCR) with a diesel exhaust flued. The WGT utilized a diesel oxidation catalyst to reduce particulate matter and SCR after treatment, in order
to reduce nitrogen oxides.


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