New Generation Doosan Excavators Offer High Performance and Fuel Efficiency

Doosan Infracore Construction Equipment is launching the new Stage IIIB compliant DX300LC-3 and DX340LC-3 crawler excavators. Designed to exceed customer requirements for productivity, fuel saving, comfort, reliability, durability and reduced overall costs, these excavators offer high performance that will increase profits and return on investment for a host of customers including civil engineers, contractors, rental companies and aggregate producers, engaged in all types of earthmoving, road building, demolition, quarrying and material-handling applications.

Highlights include:

• Unmatched operator comfort with unique jog/shuttle control
• Very high performance and fuel efficiency
• Outstanding drawbar pull and digging forces
• Many more features as standard
• Enhanced controllability and serviceability

Increased Operator Comfort

The new ROPS and OPG certified cab offers more space (+6%) for the operator and several convenient features, including direct control through the joysticks, which have new proportional thumb wheel switches and integrated buttons to provide precise, proportional control of attachments.

A new 7-inch colour high quality visual control console offers an attractive display and excellent functionality. All functions can be controlled both from the instrument panel as well as via a new jog/shuttle control next to the joystick, a feature exclusive to Doosan excavators. A new function allowing the operator to select and set engine speed, hydraulic flow and pressure for attachments, with several preset positions, is a standard feature.

A new high-quality, heated air suspension seat reduces operator fatigue, while a new cab suspension system helps to cut vibration by 20% and reduce the sound level in the cab to 71 dBA.

The cab is pressurised to prevent particles from entering the cab. Lighting capability has been increased 100% to facilitate working at night. A side camera is available as a safety option. Other features include fully automatic climate control, a USB port to play music and videos, and more storage compartments for paperwork and other items.

Higher Power and Fuel Efficiency

The DX300LC-3 and DX340LC-3 excavators are powered by the Doosan DL08K 'common rail' 6-cylinder turbocharged diesel engine meeting Stage IIIB emission regulations through the use of EGR (Exhaust Gas Recirculation) and Diesel Particulate Filter (DPF) after-treatment technologies. At 159 kW, the Doosan DL08K engine in the DX300LC-3 excavator delivers 2% more power at a lower speed of 1800 rpm than the existing DX300LC Stage IIIA model. Compared to the DX340LC, the engine in the new DX340LC-3 delivers 210 kW, a 7% increase in power at a low 1800 rpm. Factory tests show a 5 to 10% reduction in fuel consumption, depending on the operating mode selected and the work being done.

A new ECO Gauge on the control panel helps the operator to lower fuel consumption by providing real time monitoring of fuel rate and actual engine-percent load. Two new operating modes (P+ mode: Power Plus and L: Lifting) improve controllability and efficiency.

Higher Workload Output

Workload/hour outputs have increased by an average of 6% and 17% across the different power modes in the DX300LC-3 and DX340LC-3, respectively. In the DX300LC-3, a new travel device has increased the maximum travel speed to 5.3 km/h, while the drawbar pull is increased by 4% to 29,800 kg and lifting capacities have been increased by 6%. The same travel device has increased the maximum travel speed of the DX340LC-3 by 13% to 5.4 km/h and produced a 16% increase in the drawbar pull to 32,200 kg.

New hydraulic pumps and valves increase hydraulic flow by up to 11% and pressure (350-370 bar) to boost front, travel and power functions as well as increase lifting capabilities and reduce cycle times. In the DX340LC-3, the swing speed and torque have been increased by 5% and 7%, respectively, with both the bucket and arm digging forces rising by 5%. Overall, the new hydraulic systems improve the productivity of the machines through highly responsive controls.

Lower Total Cost of Ownership

Both the DX300LC-3 and DX340LC-3 excavators have a more robust undercarriage with increased durability in the boom and arm, extending mean time before failure by over 30%.

The engine bonnet is split into four parts to improve serviceability, whilst components such as filters, valves and batteries are all within easy reach for service work. Cooling capacity has been increased by 10 to 15% compared to the previous generation machines.

As well as offering more standard features than other excavators of their type on the market, there is a greatly expanded choice of options, including a floating boom system for easy levelling and finishing work. Options for heavy duty applications include dual pump flow providing extra power for high flow attachments; a straight travel pedal; an oil-washed air cleaner; and additional protection such as dual track guards and full length track guards. Both new generation excavators are available with either standard or narrow tracks as well as monobloc or articulated front working equipment.

Brief specifications for Doosan DX300LC-3 crawler excavator

• Buckets: 0.80 – 1.75 m3
• Operating weight: 30.0 – 31.1 t
• Digging depth (std front): 7305 mm
• Digging reach (std front): 10725 mm
• Digging height (std front): 10325 mm
• Track width (std): 600 mm
• Overall width: 3200 mm / 3000 mm (narrow)
• Height (std front): 3370 mm
• Overall length in travel position (std front): 10540 mm
• Tail swing radius: 3200 mm
• Drawbar pull: 29800 kg
• Digging force over bucket (ISO): 20 t
• Digging force over arm (ISO): 17 t
• Lifting capacity at ground level (over front): 11.76 t at 6.0 m
• Travel speed: low range – 3.0 km/h high range – 5.3 km/h
• Engine (SAE J1349, net): 6-cylinder Doosan DL08K
Stage IIIB (EGR),
159 kW (213 HP) at 1800 rpm

Brief specifications for Doosan DX340LC-3 crawler excavator
• Buckets: 1.20 – 2.01 m3
• Operating weight: 34.9 – 36.0 t
• Digging depth (std front): 7535 mm
• Digging reach (std front): 10725 mm
• Digging height (std front): 10970 mm
• Track width (std): 600 mm
• Overall width: 3280 mm / 3000 mm (narrow)
• Height (std front): 3390 mm
• Overall length in travel position (std front): 11280 mm
• Tail swing radius: 3500 mm
• Drawbar pull: 32200 kg
• Digging force over bucket (ISO): 25.9 t
• Digging force over arm (ISO): 23.3 t
• Lifting capacity at ground level (over front): 14.01 t at 6.0 m
• Travel speed: low range – 3.4 km/h high range – 5.4 km/h
• Engine (SAE J1349, net): 6-cylinder Doosan DL08K
Stage IIIB (EGR),
210 kW (281 HP) at 1800 rpm