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 purpose-built machines are intended to provide greater working height than conventional mono-boom excavators while combining reach and tool capacity with stability, controllability and operator comfort.
Boom configurations and capacities
The Straight Boom design is intended to support substantial demolition tool capacities while raising working height. Kobelco offers standard and long arm configurations so contractors can balance reach against tool capacity for a given application. Published arm configurations include 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 maximum reach and 7,959-pound maximum tool capacity; a 10-foot 10-inch arm with 37-foot maximum reach and 10,825-pound maximum tool capacity; and a 13-foot 7-inch arm with 39-foot maximum reach and 9,348-pound maximum tool capacity.
Engine and attachment hydraulics
Both models 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 run heavy demolition attachments in demanding applications. A case drain circuit is standard, which the company says expands compatibility with attachments that require increased hydraulic drainage. The in-cab hydraulic pressure release function lets the operator release hydraulic pressure from inside the cab before disconnecting work tools or hydraulic hoses, simplifying attachment changes.
Operator cab and controls
The cab is designed around demolition work, with a seven-way adjustable heated air-suspension seat that moves with the armrests and hydraulic controls to help reduce fatigue and absorb shock. Redesigned pilot levers use shorter strokes and horizontal movement for precise, responsive 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 displays 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.
Safety, visibility and monitoring
Both machines include a Roll-Over Protective Structure and heavy-duty Level II top and front guarding for demanding demolition environments. Rear swing flashers and rear-facing work lights are integrated into the counterweight, and seven LED work lights come standard: two boom-mounted lights, two at the front of the cab, one on the right side and two rear-facing lights in the counterweight. Kobelco's KOMEXS monitoring system gives owners and fleet managers remote access to operating hours, fuel consumption, maintenance status and machine location, along with an engine start alarm, geofencing and current and historical location information.
The SK300LC-11 and SK350LC-11 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.
Company positioning
Dan Collins, director of product development for Kobelco Construction Machinery U.S.A., said the demolition industry continues to evolve and that Kobelco is committed to purpose-built machines that address contractors' changing needs. He said the lineup expansion reflects that commitment, offering increased reach and tool capacity along with quality, comfort and controllability.