AGGREGATES MANAGER May 2014
by Therese Dunphy,
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 condi-
tions, 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 momen-
tarily disengage the float, allowing hydraulic flow to activate the boom.
Doosan Infracore | www.doosaninfracore.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 elec-
tronic management of fuel injection/intake air systems and Cat exhaust aftertreatment sys-
tems 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
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
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
Built for rugged conditions
Tier 4 final unit reduces
Saves fuel with auto idle