DX255LC-7 Doosan excavator specs & Dimensions (2021 - 2023)

Meet the New Generation of Doosan Machines

Lift your business to the next level with the DX255LC-7 Doosan excavator. Exceptionally powerful, yet environmentally friendly, the DX255LC-7 excavator features extraordinary fuel efficiency.

Operate at ease

New Doosan Smart Touch screen, an easy to read and use 8" touch screen integrates all functions and settings of your machine in one place. Don't miss any important call thanks to the hands-free phone system. And forget fumbling with keyholes: unlock the door remotely, and start or stop the engine with the included Doosan Smart Key.

Doosan Smart Touch

The wide 8" touchscreen provides easy scrolling through the different menus, including power settings and auxiliary hydraulics settings. It also allows you to connect a Bluetooth device or listen to your favorite radio station.

Take a Seat in Business Class

The ergonomic controls, the easy-to-view color monitor, and Doosan Smart Touch place the machine firmly in your hands.

Expert Fingertip Control

The new multi-function 8” Doosan Smart Touch screen displays all useful information in a visual and intuitive format. At a glance, you can check the machine’s status and settings to achieve optimal efficiency. Doosan’s unique jog shuttle switch gives you easy and precise control over all machine functions. Highly sensitive and low-effort joysticks enable you to work safely, smoothly and confidently. The proportional thumb switches on the joysticks can be mounted horizontally or vertically, as the operator prefers, for optimal control of hydraulic attachments.

Engine

Exceptionally powerful – with high torque at low revs – the new Doosan engine combines reliability and low environmental impact. This Stage V compliant 6 cylinder engine delivers 141.3 kW at 1900 rpm.

Fuel Consumption Control

The latest evolution of the legendary Stage V Doosan DL06v engine achieves greater fuel savings thanks to D-Eco Power and the 3rd generation of Smart Power Control (SPC3). Take full control over your fuel consumption with the settable engine shut off.

Efficient Fuel Management

Choice of 4 power modes (Eco - Standard - Power - Power Plus) and automatic Smart Power Control system for optimal power and reduced fuel consumption in all conditions. Engine auto-shut-off: shuts down the engine after the machine has been idling for a specified time. The operator can set the delay before shut-off via the Doosan Smart Touch screen.

Variable Pressure Turbocharger

Provides optimal air flow to the engine combustion chamber under all speed and load conditions, so that exhaust gas is cleaner and fuel economy is improved.

Smart Power Control (SPC3)

2 systems (Variable Speed Control and Pump Torque Control) work together to improve efficiency while maintaining productivity. The system reduces the engine speed and adjusts the pump torque according to work conditions.

Advanced Filtration

Fuel filters and water separator: a filter-type high-performance water separator effectively captures moisture in the fuel, reducing impurities and helping minimize any fuel-related issues. Pre-filters and dual main filters as standard achieve a high degree of purity that minimizes fuel system failures. Cyclonic air pre-cleaner: air filter life and engine efficiency are directly related to the amount of debris ingested through the engine’s air intake. Therefore, a cyclonic air pre-cleaner (as standard) is the first stage of an air intake system that prevents the majority of heavier-than-air particles from entering. Self-cleaning and maintenance-free, the system is able to expel all types of mixed debris, including mud, snow, rain, leaves, sawdust, chaff, etc.

Other Features

5900 mm boom 3000 mm arm 5000 kg counterweight DoosanCONNECT (telematic system) Auto shut-off fuel filter pump Double element air cleaner and pre-filtered Turbo dust separator Fuel pre-filter with water separator sensor Dust screen for radiator/oil cooler Self-diagnostic function Batteries (2 x 12 V, 150 Ah) – alternator (24 V, 100 A) Hydrostatic drive with 2-speed power shift transmission Remote greasing for swing circle and work group pivot points Arms: 2500 mm, 3000 mm, 3500 mm Boom: 6000 mm articulated boom DOOSAN buckets: full range of GP, HD & rock buckets DOOSAN breakers and DOOSAN quick-couplers Automatic lubrication system 500 kg counterweight Air compressor

Versatility

A new attachment mode, with a priority valve on the attachment, results in higher working efficiency when moving the arm and using the attachment at the same time. A specific tiltrotator mode provides more precision and less back pressure when high flow is required.

Intelligent Floating Boom Mode (Optional)

The “intelligent floating boom” function allows the boom to move up and down freely according to the application. In the hydraulic breaker setting, during boom down operation, the boom moves down freely under its own weight, resulting in reduced shock and vibration and longer breaker service life. In the full float setting, during boom down selection, the boom is allowed to rise and fall as required while the bucket is drawn across the ground.

4 Work Modes and 4 Power Modes

These modes deliver the needed power according to your specific application while minimizing fuel consumption. The work modes include: 1-way mode 2-way mode Digging mode Lifting mode. With the 2-way mode, we now have a priority valve on the attachment line to increase the machine’s productivity when using an attachment and moving the arm at the same time. A new mode is also available, dedicated for tilt rotator use, to maximize precision and minimize back pressure. The power modes include: Power Plus mode Power mode Standard mode Economy mode.

Hydraulic System

The hydraulic system features: Boom and arm flow regeneration Fine swing mode, on or off from cab Swing anti-rebound valves Spare ports (valve) One-touch power boost function Double way line high flow + breaker piping (PE3C) Smart Power Control (SPC3) Cylinder cushioning & contamination seals Double pump flow Clamshell piping (diverter valve from bucket cylinder) Hydraulic piping low flow for rotating or tilting tool (joystick control) Hydraulic piping for quick-coupler Floating boom.

Undercarriage durability

Forged steel and deep-hardened top rollers – oil-lubricated rollers – heat-treated sprocket – deep-hardened, heat-treated, grease-lubricated & longer life track chains. The chain is composed of sealed, self-lubricating links for long-term dependability. For improved protection, alignment and performance, there are 3 types of guard available: normal, double, and full-length, according to the application. The track spring and idler are joined for long-lasting performance and easy maintenance. Cast steel heavy-duty sprockets guarantee the highest resistance. The track rollers are lubricated for life.

Extra-strong x chassis

Designed using finite element analysis and 3D computer simulation, the X shaped undercarriage ensures optimum structural integrity and durability.

Undercarriage

Standard fixed undercarriage 3200 mm with 600 mm shoes, 600 mm triple grouser shoes, 700 mm triple grouser shoes, 800 mm triple grouser shoes, 900 mm triple grouser shoes. Narrow fixed undercarriage 3000 mm with 600 mm shoes.

Your safety is our priority

Rear and right side cameras as standard, anti-slip steps and platforms, as well as guard rails on upper structure. Optional: a 360° all-around view camera (AVM) can be linked with unique ultrasonic detection for maximum safety while working with people around. Large side mirrors, 9 powerful LED work lights (4 additional lights possible as an option), travel alarm.

New Fine Swing Function

Another new standard feature is the Fine Swing function. This function minimizes the shaking that a lifted object undergoes at the start or stop of the excavator’s swing movement – increasing the safety of nearby workers and preventing damage caused by the object falling from the excavator. When Fine Swing activates, the overrun shuts off, allowing the DX255LC-7 to smoothly reach maximum swing speed and removing the shock from the turn reversal at the moment of stopping - resulting in a smooth stop.

Safety Features

Roll Over Protective Structure (ROPS) Boom and arm cylinder safety valves Overload warning device Large guard rails on upper structure and steps Rotating beacon Punched metal anti-slip plates Hydraulic safety lock lever Safety glass Hammer for emergency escape Right and left rear-view mirrors Lockable fuel cap and covers Battery cut-off switch Emergency engine stop switch and hydraulic pump control switch Engine restart prevention system Guard rails (ISO 2867:2011) Parking brake LED 9 work lights (2 boom lamps, 5 body lamps, 2 additional lamps on cab) LED work lights 4 additional lamps (2 in the front, 2 in the rear of the cab) Falling Objects Guard System – top and front cab guards (ISO 10262 level II and SAE J1356) Front window upper and lower guards.

Cab Suspension

The cab's suspension system (CabSus mount) dampens vibrations and provides outstanding protection against impact. This system absorbs shocks and vibrations much more effectively than a conventional silentblock suspension system.

AdBlue Tank

Connected to the ECU, sensors in the tank detect low levels of AdBlue or any other system malfunction. Also equipped with an AdBlue level indicator during refilling (LED light), to avoid over filling.