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 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.
The straight-boom configuration is designed to raise working height and support substantial demolition tool capacity. KOBELCO offers standard and long arm choices so contractors can balance maximum reach against tool capacity for a given application. The machines are equipped to handle a range of demolition attachments.
Reach and capacity
KOBELCO lists the following reach and tool-capacity figures for standard and long arm configurations:
- 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
Power and attachment hydraulics
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 hydraulic pressure from inside the cab before disconnecting work tools or hydraulic hoses, simplifying attachment changes.
Operator station and controls
The cab is designed around comfort, visibility and intuitive control. A seven-way adjustable heated air-suspension seat moves with the armrests and hydraulic controls to help reduce fatigue and absorb shock. Redesigned pilot levers have 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 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. Automatic climate control, Bluetooth hands-free audio, USB charging and LED-backlit controls are also included.
Protection and jobsite visibility
The cab incorporates a Roll-Over Protective Structure and heavy-duty Level II top and front guarding for demolition environments. 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 lights in the counterweight.
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 through increased reach and tool capacity, along with quality, comfort and controllability.
Fleet monitoring and warranty
KOMEXS, KOBELCO's monitoring excavator 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 models are backed by KOBELCO's standard machine warranty, with KOMEXS included while the machine is covered under the factory warranty; extended coverage is available.