KOBELCO Construction Machinery U.S.A. has added the SK300LC-11 and SK350LC-11 Straight Boom excavators to its demolition equipment lineup, expanding a range designed around working height and attachment capacity.
The straight-boom configuration is intended to provide greater working height than conventional mono-boom machines. KOBELCO says the models combine reach and tool capacity with stability, controllability and operator comfort. Both are purpose-built for demolition applications and are equipped to handle a range of demolition attachments.
Engine and hydraulic setup
Both machines 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 greater hydraulic drainage. The in-cab hydraulic pressure release function allows the operator to relieve hydraulic pressure from inside the cab before disconnecting work tools or hydraulic hoses, simplifying attachment changes.
Reach and tool capacity
The straight-boom design supports substantial demolition tool capacities, and buyers can choose standard or long arm configurations to balance reach against capacity. KOBELCO lists four configurations: 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 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.
Cab and controls
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 have shorter strokes and horizontal movement for precise, responsive 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 can show 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.
Other cab features include automatic climate control, Bluetooth hands-free audio, USB charging and LED-backlit controls.
Protection and visibility
The cab has 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 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.
Telematics 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 SK300 and SK350 Straight Boom models carry 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 the company is committed to purpose-built machines addressing contractors' changing needs. He said the lineup expansion reflects that commitment, with increased reach and tool capacity along with quality, comfort and controllability.