KOBELCO Construction Machinery U.S.A. has expanded its demolition equipment lineup with the SK300LC-11 and SK350LC-11 Straight Boom excavators. The company says the new models are purpose-built for demolition and are intended to provide greater working height than conventional mono-boom machines while combining reach and tool capacity with stability, controllability and operator comfort.
Both excavators use a 265-hp Isuzu Tier 4 Final engine with SCR/DEF emissions technology and no diesel particulate filter. KOBELCO says the engine supplies the power and torque required for heavy demolition attachments in demanding applications. A case drain circuit is standard, broadening compatibility with attachments that need greater hydraulic drainage. An in-cab hydraulic pressure release function lets operators release pressure before disconnecting tools or hoses, simplifying attachment changes.
Boom and arm configurations
The straight-boom design is intended to raise working height while supporting substantial demolition tool capacities. Contractors can choose standard or long arm configurations to balance reach and tool capacity. KOBELCO lists four reach and capacity combinations: a 10-foot 2-inch arm with 36-foot maximum reach and 8,708-pound maximum tool capacity; a 13-foot 1-inch arm with 39-foot reach and 7,959-pound capacity; a 10-foot 10-inch arm with 37-foot reach and 10,825-pound capacity; and a 13-foot 7-inch arm with 39-foot reach and 9,348-pound capacity.
Operator cab and controls
The cab includes a seven-way adjustable heated air-suspension seat that moves with the armrests and hydraulic controls, intended to reduce fatigue and absorb shock. Redesigned pilot levers have shorter strokes and horizontal movement for precise control. A 10-inch color 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. Other cab features include automatic climate control, Bluetooth hands-free audio, USB charging and LED-backlit controls.
Safety, visibility and fleet monitoring
Both machines have a Roll-Over Protective Structure cab with 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 are standard: two on the boom, two at the front of the cab, one on the right side and two rear-facing units in the counterweight. KOBELCO KOMEXS telematics gives owners and fleet managers remote access to operating hours, fuel consumption, maintenance status and machine location. It also includes an engine start alarm, geofencing and current and historical location information.
Dan Collins, director of product development for KOBELCO Construction Machinery U.S.A., said the demolition industry continues to evolve and the company is committed to purpose-built machines that address contractors' changing needs. He said the lineup expansion reflects that commitment and offers increased reach and tool capacity along with quality, comfort and controllability.
The SK300 and SK350 Straight Boom models are covered by KOBELCO's standard machine warranty. KOMEXS is included while the machine is covered under the factory warranty, and additional extended warranty coverage is available.