May 1, 2014
A bevy of new excavators round out existing offerings in this product category.
The Doosan DX350LC-3 excavator features a 281-horsepower engine, a 77,603-pound operating weight, and a 41,667-pound arm digging force. Built for the most rugged conditions, this excavator features significant power and performance increases to go along with its Tier 4 interim status. A new boom float option allows the boom to move freely up and down without hydraulic flow, while a temporary reset button offers the ability to momentarily disengage the float, allowing hydraulic flow to activate the boom.
Doosan Infracore | www.doosaninfracore.com
Weighing in at 105,822 pounds, Liugong’s 950E is one of its largest crawler excavators. It features the manufacturer’s Intelligent Power Control System (IPC) to provide more accurate matching and control over engine speed and main pump flow for more powerful and smoother operation. Six selectable work modes optimize fuel consumption, while an auto idle function reduces engine rpms to 1,000 rpm once the machine has been at rest for seven seconds. The unit is powered by a Cummins QSM11 375 Tier 3 diesel engine.
Liugong | www.liugong.com
Cat’s 374F excavator uses its ACERT C15 engine to meet Tier 4 Final emission regulations and burns 13 percent less fuel than its D Series predecessor. With a net power rate of 472 horsepower, the engine uses a combination of emission control technologies, including electronic management of fuel injection/intake air systems and Cat exhaust aftertreatment systems to meet requirements without impacting performance. Two power modes — standard and economy — allow the operator to select an engine speed that meets the application needs. The unit has a maximum digging depth of 31 feet, 7 inches and a maximum reach of 46 feet, 8 inches.
Caterpillar | www.cat.com
With 359 net horsepower, Komatsu’s PC490LC-11 is powered by its Tier 4 Final SAA6D125E-7 engine and features an operating weight between 105,670 pounds and 110,220 pounds. The unit has a heavy-duty undercarriage and counterweight to maintain the same high-lift capacity and lateral stability as its predecessor. The operator can select Lift Mode, which raises hydraulic pressure to increase lifting force up to 7 percent. The machine is also equipped with the Komatsu Equipment Management Monitoring System.
Komatsu | www.komatsuamerica.com
Case Construction Equipment introduced its new CX350D, the first of its D Series to be shown in North America, during ConExpo-Con/Agg 2014. The unit, which will be available in early 2015, is said to offer significant advances in power, fuel savings, operation, and control, while meeting Tier 4 Final regulations. It has a combination of cooled exhaust gas recirculation, selective catalytic reduction, and diesel oxidation catalyst technologies, which helps maximize uptime and performance. Cycle times are said to be 8 percent faster, while fuel efficiency is 10 percent greater. The excavator is rated at 268 horsepower and weighs in at 82,400 pouonds.
Case Construction Equipment | www.casece.com
The EC380E crawler excavator from Volvo Construction Equipment features a Tier 4 Final engine and is said to combine superior efficiency, productivity, and durability for maximum profitability in quarry applications. The engine delivers high digging and breakout forces alongside reduced emissions and a 9-percent improvement in fuel efficiency. Hydraulics are matched to the engine and controlled by an advanced system that provides on-demand flow and reduces power losses within the circuit. The machine weighs 36 to 43 tons, depending on configuration, and operates at 306 horsepower.
Volvo Construction Equipment | www.volvoce.com
Kobelco’s SK500LC weighs 111,800 pounds and has a bucket capacity of 2.48 cubic yards. It features a 345-horsepower HINO engine. The machine is said to have top-class digging forces, with a maximum bucket crowding force (with power boost) of 57,500 pounds. ECO mode controls the engine and hydraulic pressure to reduce fuel consumption. Three modes — H (heavy workload), S (balanced workload), and ECO (light workout and fuel savings) — are available. The manufacturer says the excavator offers straight travel, which allows it to lift the rated lift chart while walking, to enhance productivity and safety.
Kobelco Construction Machinery USA | www.kobelco-usa.com
Hyundai’s R 1200-9 is its biggest excavator. New to the North American market, it has an operating weight of 260,140 pounds and is powered by a fuel-efficient 740-horsepower Cummins QSK23-C engine. It boasts a dig depth of 26 feet, 3 inches, a bucket digging force of 125,540 pounds, and a bucket capacity of 8.76 cubic yards. The redesigned hydraulic system provides operators with improved controllability, while improved pump flow minimizes fuel consumption.
Hyundai Construction Equipment Americas, Inc. | www.hceamericas.com