Kobelco Construction Machinery U.S.A. has added the SK300LC-11 and SK350LC-11 Straight Boom excavators to its demolition equipment lineup. The two machines are purpose-built for demolition work and are intended to provide greater working height than conventional mono-boom excavators while carrying a range of demolition attachments.
Kobelco says the straight-boom design combines reach and tool capacity with stability, controllability and operator comfort. Contractors can choose standard or long arm configurations, allowing them to balance maximum reach against maximum tool capacity for a given application. Across the two models, Kobelco lists four arm configurations: a 10-foot 2-inch arm with 36-foot reach and 8,708-pound 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.
Engine and hydraulic package
Both models 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 needed for heavy demolition attachments in demanding applications. A case drain circuit is standard, expanding compatibility with attachments that require greater hydraulic drainage.
The in-cab hydraulic pressure release function lets the operator release pressure before disconnecting work tools or hydraulic hoses, simplifying attachment changes. Hydraulic flow settings for breakers, nibblers and rotating grapples can be adjusted through the cab monitor, and settings for additional attachments can be added or changed.
Cab, visibility and protection
The operator cab has a seven-way adjustable heated air-suspension seat that moves with the armrests and hydraulic controls. Redesigned pilot levers use shorter strokes and horizontal movement. 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.
Cab amenities include automatic climate control, Bluetooth hands-free audio, USB charging and LED-backlit controls. For demolition work, 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 on the boom, two at the front of the cab, one on the right side and two rear-facing units in the counterweight.
Monitoring and warranty
The KOMEXS remote monitoring system gives owners and fleet managers 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. KOMEXS is included while the machine is covered under Kobelco’s standard factory warranty; extended warranty coverage is available.
Dan Collins, director of product development for Kobelco Construction Machinery U.S.A., said the demolition industry continues to evolve and that the expanded lineup is intended to address contractors’ changing needs for reach, tool capacity, comfort and controllability.