The Doosan DX140W wheel excavator combines increased power and performance with interim Tier 4 (iTIV) updates. New technologies make this excavator ideal for highway and street development, commercial construction, bridge and railway development and dealer rental, according to the manufacturer.
The DX140W is powered by a 135-hp (100.6 kW), 6-cylinder DL06KB water-cooled diesel engine that has been optimized for use with cooled exhaust gas recirculation (CEGR) system, diesel oxidation catalyst (DOC) and diesel particulate filter (DPF). The engines in this configuration are optimized to reduce nitrogen oxide (NOX) and after-treatment is needed to reduce particulate matter, to comply with iT4 emission regulations. The turbocharged 359-cu.-in. engine features a high pressure common rail design with direct fuel injection, electronic control and four valves per cylinder.
Performance
The electronic power optimizing system (EPOS) provides optimum power and fuel efficiency via four work modes, auto-idle and machine diagnostics. Operators can work more effectively with multiple operating modes, easy-to-read display monitors and precise control levers. The new power plus mode provides improved performance and faster workgroup speeds for heavy duty work. Four work modes — digging, breaker, shear and the new lifting mode — allow operators to get maximum efficiency and fuel economy in specific applications.
A new electronic fan clutch reduces fuel consumption and noise levels, while providing cooling system improvements. Outriggers can be controlled individually to level the machine on uneven surfaces. The front axle oscillates and provides excellent steering angles for maneuverability, but can be locked for better digger and lifting performance.
Options
The DX140W features a new intelligent floating boom option that allows the boom of the excavator to “float” up or down, allowing the operator to focus more on the task while decreasing the machine workload and increasing efficiency. Intelligent floating boom mode allows the boom to move freely up and down without hydraulic flow; and in breaker mode the boom is allowed to move freely down, only without hydraulic flow. A temporary reset button allows the ability to momentarily disengage the float, allowing hydraulic flow to activate the boom. Also offered is an air compressor, which is ideal for operators in remote and dusty locations to blow out the cab or filters.
Comfort
Doosan continues to focus on operator comfort with further enhancements to the roll-over protective structure (ROPS) cabin. Both a seat height lever and tilting function for the seat cushion were added to the seat to allow the operator to find an optimum seating position. The cabin mounting mechanism has been improved with a thickened dampening plate, and an internal coil spring has been added to reduce cabin vibration 20 percent, allowing operators to work longer days with less fatigue.
The door window position slider now locks in various positions, preventing it from moving from its intended location. The door space of the cab has increased by 1.8 in., allowing the operator to get in and out more easily. The cabin size has increased 6.1 percent, providing more headroom. The joystick angle has been reduced from 25 degrees to 19 degrees to provide a more ergonomic profile and decrease interference with operators’ legs.
The Doosan DX140W — like every new Doosan machine — is covered by a 48 hour parts guarantee. The program guarantees that if a “machine-debilitating” part is needed, Doosan will deliver it directly to the end user within two business days or Doosan will pay for a replacement machine rental. The 48 hour parts guarantee is subject to carrier delivery restrictions and/or governmental agency delays.
For more information, visit www.doosanequipment.com.
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