Doosan recently added a new crawler excavator to its Tier 4-compliant lineup with the addition of the 184-hp Doosan DX255LC-5.
The new Doosan crawler excavator features improved performance, operator-focused comfort, fuel economy and jobsite durability and replaces the interim Tier 4 DX255LC-3.
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.
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.
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 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 three 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 five minutes for off-highway machines.
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 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.
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.