Kobelco Construction Machinery U.S.A. has added the SK300LC-11 and SK350LC-11 Straight Boom excavators to its demolition equipment lineup. The machines are designed to provide greater working height than conventional mono-boom excavators while combining reach and tool capacity with stability, controllability and operator comfort.
Both models are purpose-built for demolition applications and are equipped to handle a range of demolition attachments. The straight-boom design provides increased working height compared with conventional boom configurations while supporting substantial demolition tool capacities.
Engine and attachment hydraulics
The SK300LC-11 and SK350LC-11 use 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 is standard, expanding 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.
Reach and tool-capacity configurations
Contractors can choose standard or long arm configurations to balance increased reach against greater tool capacity. The configurations listed by Kobelco include:
- Standard 10-foot 2-inch arm: 36-foot maximum reach and 8,708-pound maximum tool capacity
- Long 13-foot 1-inch arm: 39-foot maximum reach and 7,959-pound maximum tool capacity
- Standard 10-foot 10-inch arm: 37-foot maximum reach and 10,825-pound maximum tool capacity
- Long 13-foot 7-inch arm: 39-foot maximum reach and 9,348-pound maximum tool capacity
The figures reflect the trade-off between longer reach and lower tool capacity in the long-arm versions, while the standard arms support higher tool weights with somewhat shorter reach.
Cab, controls and monitoring
The cab has a seven-way adjustable heated air-suspension seat that moves with the armrests and hydraulic controls to help reduce operator 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, while 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 and fleet visibility
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.
Kobelco's KOMEXS monitoring system 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 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.
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 addressing contractors' changing needs. He said the expansion reflects that commitment by offering increased reach and tool capacity along with best-in-class quality, comfort and controllability.