(VIDEO) Doosan launches new line of next-generation crawler excavators in North America

By
Heavy Equipment Guide Staff
July 19, 2022

A Doosan DX255LC-7 crawler excavator

Doosan Infracore North America has released its next-generation -7 Series crawler excavators in the United States and Canada. The initial launch includes four models, with more excavators coming in the future. The first models are the Doosan DX140LCR-7, DX225LC-7, DX255LC-7, and DX350LC-7.

The Doosan -7 Series crawler excavators have the fuel efficiency and productivity operators need. With more comfort features, intelligent controls, and smart machine functionality, operators can handle whatever comes their way.

"Doosan continues to build on the success of its existing excavator platform with more machine features that help our customers improve their productivity," says Joel Escalante, product specialist. "We've enhanced the excavator cab with additional comfort features and now offer an all-around view monitor for even better operator visibility of the job site."

Updates to the -7 Series excavators include a strengthened work group with reinforced castings and forged steel pivot points for withstanding high-impact work. A new Y-shaped seal at the end of the excavator's arm provides better sealing to the bucket connection.

Doosan added material to the excavator's mainframe for higher performance and job site versatility. The excavator's X-Chassis undercarriage further enhances durability and stability, while the track chain is sealed and self-lubricating for reduced maintenance. Cast-steel sprockets are designed to stand up to challenging work environments and track rollers and idlers are provided with oil level check plugs to maximize machine uptime.

Machine interior enhancements

The redesigned models are built to reduce noise and vibration. Inside the cab is an optional air-suspension seat that is heated and cooled, ergonomically designed joystick controls, and a new eight-inch Smart Touch screen. The new cabs have a single wiper that clears both the top and bottom of the front window during inclement weather.

The Doosan Smart Touch screen, standard on all -7 Series crawler excavators, displays all important settings and information on one screen. From the touch screen, operators can monitor critical machine functions and control machine settings, rearview camera, heating and cooling, radio, and Bluetooth technology.

All-around view monitoring (AVM) System

The optional 360-degree all-around view monitoring (AVM) camera system displays a full view of the machine's surroundings, giving operators visibility when operating or positioning the machine in tight work areas. Five visual perspectives can be seen from the separate AVM monitor: top view, rear view, top+right view, rear+corner view, and 3D view. The AVM camera system can be linked with optional ultrasonic detection sensors for an additional level of awareness of objects behind the machine.

Excavator performance features

Operators can lift more weight with each cycle and complete their jobs faster with Doosan excavators designed and tested to maximize lifting capability. The standard counterweight provides improved machine stability when using heavier attachments. With an ideal swing radius, lift height, and tilt position, operators can lift and place loads and dig with greater productivity.

The -7 Series crawler excavators (14 metric tons to 25 metric tons) offer a cast push link with a reinforced lifting eye that has a five-metric-ton lifting capacity. This design allows operators to remove an attachment and lift directly to fully utilize the machine's lifting capacity.

New for the -7 Series is the fine swing function. This function minimizes the shaking of a lifted object that occurs at the beginning or end of the swing movement. Operators can activate it for more control and accuracy in certain lifting applications. This feature improves safety in pipe laying and maintains the bucket heap.

The new reduced tail swing counterweight design, along with the tighter front minimum swing radius on the reduced tail swing models, allows operators to work in confined areas – such as waste transfer stations and single-lane roadways – without sacrificing machine performance.

Doosan attachments are designed to match the excavator load ratings and hydraulic performance. A 16 GPM PTO pump helps improve the performance of various excavator attachments that require more hydraulic flow.

Technology in Doosan's -7 Series crawler excavators

The DoosanCONNECT telematics system comes standard on all -7 Series crawler excavators, making it easy for customers to remotely monitor and maintain their machines. DoosanCONNECT telematics is an equipment diagnostic tool that monitors the health, location, and productivity of Doosan construction equipment from a mobile app and website. The data pulled from the machines is uploaded automatically to the DoosanCONNECT online system using dual-mode communications (cellular and satellite) for maximum coverage. Doosan dealers can access the machine data and work with customers to resolve issues or make preventive maintenance recommendations to minimize downtime. With DoosanCONNECT Telematics, customers can do the following:

Help prevent theft with a geofencing feature (GPS location tracking).
Avoid unauthorized use of the machine.
See when maintenance is due.
Customize alerts to the customer's schedule.
Track oil pressure, operating temperature and more.

Four power modes

Doosan continues to offer four selectable power modes, giving operators more control over the excavator's performance and helping to reduce fuel consumption.

Power+ mode delivers the fastest work speeds to save more time when loading trucks. Top digging performance delivers extra power for digging in hard ground and other tough conditions.
Power mode provides ideal power and performance for digging and heavy lifting. It also provides quick truck loading and fast travel speed to save time.
Standard power mode optimizes fuel consumption and performance in everyday digging, grading, and lifting.
Economy mode reduces fuel consumption for low-demand applications and slows down machine movement, which is ideal for fine digging, light grading conditions, and job site conditions that require extra precision.

An electronically controlled crawler excavator coming soon

Available this year, Doosan is adding a new electronically controlled model with machine-assisted technologies. The fully electro-hydraulic control system on the DX225LC-7X crawler excavator enables advanced machine guidance and machine control systems. This includes a 2D and upgradable 3D grading system for earthmoving and grading work.

This technology includes programmable joystick switches for ease of operation; a fully electronic joystick; a rotary sensor; and equipment sensors on the boom, arm, bucket, and upper body of the DX225LC-7X, including a laser catcher. This system allows the machine to provide supplementary assistance with precision functions and tasks. For operators, this results in improvements in productivity and efficiency.

Functions of the DX225LC-7X

Grade assist mode: for accurate grading and quicker cycles. The excavator operator can program the machine to control the boom and bucket functions while the arm-in function is controlled by the operator.
Bucket angle setting: maintains the bucket at a specific angle.
Swing assist: set the swing angle for repetitive digging tasks.
Swing limit: the operator sets left and right swing limits (virtual walls). Virtual wall settings for arm out plus ceiling and floor limits to work in confined spaces to improve safety and productivity.
Weighing system: to measure and display material in the bucket and monitor totals when loading trucks.
Lift assist mode: monitors weight in the bucket, calculates tipping load, and alerts operators to improve safety.