New Hydrostatic Drive Wheel Loaders From Doosan
Doosan's new DL200-5 and DL200TC-5 (tool carrier) are the company's first wheel loaders with hydrostatic drive. The “dash-5” loaders replace the “dash-3” models, transitioning from interim Tier 4 to a Tier 4-compliant engine. They offer improvements in fuel efficiency, operator comfort, serviceability and reliability.
Two lift-arm designs are available. The 142-hp DL200-5 wheel loader is built with a standard Z-bar lift-arm linkage system, for digging, heavy lifting and general construction tasks. The DL200TC-5 wheel loader has a parallel-lift-linkage system to help the operator keep the load level through the entire lift cycle. Both have a 2.6 cubic-yard bucket capacity.
The hydrostatic drive system replaces a torque converter transmission for improved fuel efficiency, enhanced machine control for productivity, and reduced break wear. Unique to the hydrostatic drive system, the engine rpm is not directly correlated to the machine’s travel speed, so the maximum travel speed remains unaffected. This provides power for tough conditions and truck loading. It also balances fuel consumption for digging, grading and lifting, and helps reduce fuel consumption for low-demand applications.
Operators can adjust traction force to meet job site conditions. A new speed management system lets operators use full engine rpm for lift arm or hydraulic attachment performance, yet fine-tune travel speed using seven levels within first gear, up to 8 mph.
Cab enhancements include an improved adjustable steering column to provide more leg room, ease of operation and more floor space. A new fuel consumption gauge, updated keypad, improved visibility and two rear LED lamps.
Ease-of-maintenance updates include additional oil sampling ports to improve preventive maintenance procedures. In addition, various fluid pressures are now viewable via the dash panel, allowing monitoring from inside the wheel loader cab.
Doosan achieved Tier 4 emission requirements without the need for a diesel particulate filter (DPF). The engines are optimized for use with a high-pressure common-rail (HPCR) fuel delivery system and a cooled exhaust gas recirculation (CEGR) system, and a wastegate turbocharger (WGT) and selective catalytic reduction (SCR) with diesel exhaust fluid (DEF).
You can find more information here: DL200-5 and DL200TC-5
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