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 more working height than conventional mono-boom excavators while maintaining stability, controllability and operator comfort.
KOBELCO says the straight-boom design increases reach and supports a broad range of demolition attachments. Contractors can choose between standard and long arm configurations, allowing them to balance maximum reach against maximum tool capacity for the application.
Engine and attachment support
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 delivers the power and torque needed to run heavy demolition attachments in demanding work.
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 relieve pressure from inside the cab before disconnecting work tools or hydraulic hoses, simplifying attachment changes.
Reach and tool-capacity configurations
KOBELCO lists the following arm configurations, which show the trade-off between reach and tool capacity:
- 10-foot 2-inch arm: 36-foot maximum reach and 8,708-pound maximum tool capacity
- 13-foot 1-inch arm: 39-foot maximum reach and 7,959-pound maximum tool capacity
- 10-foot 10-inch arm: 37-foot maximum reach and 10,825-pound maximum tool capacity
- 13-foot 7-inch arm: 39-foot maximum reach and 9,348-pound maximum tool capacity
Across the lineup, the longer-arm options extend reach to 39 feet, while the shorter-arm configurations carry higher tool-capacity ratings.
Cab, controls and monitoring
The operator cab includes 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 have shorter strokes and horizontal movement for precise control. 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. 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.
For protection, the cab uses 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 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.
Fleet monitoring and warranty
KOBELCO KOMEXS 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 covered by KOBELCO's standard machine warranty, with KOMEXS included while the machine remains under the factory warranty; extended coverage is available.