The 184-horsepower Doosan DX255LC-5 crawler excavator has been added to the Tier 4-compliant lineup, featuring improved performance, operator-focused comfort, fuel economy and jobsite durability. The Tier 4-compliant model replaces the interim Tier 4 (iT4) DX255LC-3.
Smart Power Control (SPC)
A new selectable feature, Smart Power Control (SPC), consists of two systems — Variable Speed Control and Pump Torque Control — that work together to improve machine efficiency while maintaining productivity and reducing fuel consumption. The engine control unit (ECU) automatically manages SPC when SPC is engaged. Each of the four power modes will function with SPC engaged or disengaged; however, SPC can be active only in the digging work mode.
• Variable Speed Control: Reduces engine rpm during low workload requirements such as during the swing portion of a dig cycle. This reduces the total energy required to perform a task and improves fuel efficiency by up to 3-7 percent.
• Pump Torque Control: Efficiently matches hydraulic pump torque and engine response to the task, preventing engine overload and excess fuel consumption, improving efficiency.
Display enhancements
An improved 7-inch LCD screen allows operators to continue monitoring the excavator parameters while viewing the rearview and/or side-view camera image. Critical machine data appears next to the camera view. With an optional side camera, a split screen allows both camera displays to be viewed at once. New additions to the monitor include the DEF gauge and improved fuel efficiency.
To help save valuable diesel fuel, Doosan added auto-shutdown to its excavators to help owners save fuel during non-working conditions. Operators can configure the idle time from 3 to 60 minutes. When enabled, the feature will shut down the excavator’s engine when the preset idle time is met. This is particularly helpful in California where state regulations require idling for only 5 minutes for off-highway machines.
New machine updates
In addition to auto-shutdown and LCD screen updates, the new Doosan DX255LC-5 crawler excavator has the following updates:
• Improved anti-skid plates: for easier engine access for machine maintenance
• Auto belt tensioner, fan and air conditioning: simplifies maintenance
• Emergency engine stop: relocated for easier operator access
• Improved serviceability: allows for easier access to components and less time for maintenance
• Upgraded alternator: delivers improved power for electrical components
• New front window design: provides good visibility to the work area
Doosan Telematics
Doosan excavators come with a standard 3-year subscription to Doosan Telematics, which allows equipment owners and fleet managers to remotely monitor machine location, hours, fuel usage, engine idle versus work time, error codes and engine as well as hydraulic temperatures. Machines can be monitored via an online Doosan Telematics account. In addition, Doosan dealers can provide improved customer support using the system by responding to machine warning messages and alerts, troubleshooting machine issues, and then sending a field service vehicle to help with repairs and the proper parts.
Tier 4 compliance
The Doosan DX255LC-5 complies with Tier 4 emission standards with modified diesel engines and aftertreatment technologies. The engine is optimized for use with a high-pressure common-rail (HPCR) fuel delivery system and a cooled exhaust gas recirculation (CEGR) system. It utilizes a diesel oxidation catalyst (DOC) to reduce particulate matter (PM) and selective catalyst reduction (SCR) aftertreatment to reduce nitrogen oxides (NOx). Additionally, a variety of aftertreatment systems have been implemented as part of the Tier 4 compliance, such as diesel exhaust fluid (DEF), which is used with SCR technology.
Options
Factory-installed options for the new Doosan crawler excavators include the following:
• Straight travel pedal, which allows the operator to travel in a straight line more easily
• Two-way auxiliary hydraulic pedal (in addition to joystick control)
• Diesel-powered coolant heater for cold starts
• Cab guarding for special applications
• Additional work lamps
• Rotate circuit hydraulic piping
• Intelligent floating boom
ABOUT DOOSAN INFRACORE CONSTRUCTION EQUIPMENT AMERICA
Doosan Infracore Construction Equipment America, headquartered in West Fargo, North Dakota, markets the Doosan brand of products that includes large excavators, wheel loaders and articulated dump trucks. With more than 160 heavy equipment dealer locations in North America, Doosan is known for an unmatched dedication to service and customer uptime, and durable, reliable products. Doosan is fast becoming a global force in heavy construction equipment. Doosan Infracore Construction Equipment America is a subsidiary of Doosan Infracore Bobcat Holdings Co., Ltd., a wholly owned subsidiary of Doosan Infracore Co., Ltd. For more information on Doosan products, visit doosanequipment.com.
Quick Look: Doosan DX255LC-5 crawler excavator
• Horsepower (net): 184 hp
• Operating weight: 57,752 lb.
• Max. digging reach (ground): 32 ft. 9 in.
• Max. digging depth: 22 ft. 4 in.
• Max. loading height: 23 ft.
• Bucket digging force: 39,463 lbf.
• Arm digging force: 28,219 lbf.
• Four power modes
• Four work modes