KOBELCO Construction Machinery U.S.A. has added the SK300LC-11 and SK350LC-11 Straight Boom excavators to its demolition equipment lineup. The company says the new models are designed to provide greater working height than conventional mono-boom machines while combining increased reach and tool capacity with stability, controllability and operator comfort.
Both excavators are purpose-built for demolition and are equipped to handle a wide range of demolition attachments. Their straight-boom configuration raises working height compared with conventional boom designs and supports substantial demolition tool capacities, according to KOBELCO. Contractors can choose standard or long arm configurations to balance reach and tool capacity for the application.
Engine and attachment hydraulics
The SK300LC-11 and SK350LC-11 are powered by a 265-hp Isuzu Tier 4 Final engine with SCR/DEF emissions technology and no diesel particulate filter. KOBELCO says the engine provides the power and torque needed to operate heavy demolition attachments in demanding applications.
A case drain circuit comes standard, expanding compatibility with attachments that require increased hydraulic drainage. An in-cab hydraulic pressure release function is intended to simplify attachment changes: it lets the operator release hydraulic pressure from inside the cab before disconnecting work tools or hydraulic hoses.
Reach and tool-capacity options
The announced arm configurations include a standard 10-foot 2-inch arm with 36-foot maximum reach and 8,708-pound maximum tool capacity, and a long 13-foot 1-inch arm with 39-foot maximum reach and 7,959-pound maximum tool capacity. Also listed are a standard 10-foot 10-inch arm with 37-foot maximum reach and 10,825-pound maximum tool capacity, and a long 13-foot 7-inch arm with 39-foot maximum reach and 9,348-pound maximum tool capacity.
Operator station
The cab is intended to combine comfort, visibility and intuitive controls for demanding demolition work. A seven-way adjustable heated air-suspension seat moves with the armrests and hydraulic controls to help reduce operator fatigue and absorb shock. Redesigned pilot levers have shorter strokes and horizontal movement for precise, responsive control.
A 10-inch colour monitor and jog dial provide access to machine settings, attachment flow adjustments, maintenance information and fuel-consumption data. The monitor also shows a 270-degree view from the standard three-camera system. Hydraulic flow settings for breakers, nibblers and rotating grapples can be adjusted through the monitor, and settings for additional attachments can be added or changed. Cab amenities include automatic climate control, Bluetooth hands-free audio, USB charging and LED-backlit controls.
Protection, visibility and fleet monitoring
The cab incorporates a Roll-Over Protective Structure and heavy-duty Level II top and front guarding. Rear swing flashers and rear-facing work lights are integrated into the counterweight. Seven LED work lights come standard: two boom-mounted lights, two at the front of the cab, one on the right side of the machine and two rear-facing lights in the counterweight.
KOBELCO KOMEXS gives owners and fleet managers remote access to operating hours, fuel consumption, maintenance status and machine location. It also provides an engine start alarm, geofencing and current and historical location information. The models are backed by KOBELCO's standard machine warranty, with KOMEXS included while the machine is covered under the factory warranty; extended warranty coverage is available.
“As the demolition industry continues to evolve, KOBELCO is committed to purpose-built machines that address the changing needs of demolition contractors,” said Dan Collins, director of product development for KOBELCO Construction Machinery U.S.A. He added that the lineup expansion reflects that commitment and offers increased reach and tool capacity along with what KOBELCO describes as best-in-class quality, comfort and controllability.