Designed to provide precision control for fine grading and leveling applications, Kobelco Construction Machinery America’s new SK260LC Acera Mark 8 hydraulic excavator features an innovative intelligent total control system (ITCS) that recognizes the operator’s moves and provides smooth hydraulic response.
As the operator moves the control levers, an auto-acceleration system increases engine speed and hydraulic flow by a proportionate amount, resulting in even acceleration for precise operations. After four seconds of operator inactivity, the auto-deceleration system reduces engine speed to reduce unnecessary fuel consumption and extend engine life.
To deliver maximum power for a wide range of applications, the SK260LC is powered by a six-cylinder Iveco diesel engine that is U.S. EPA Tier 3 certified. The turbocharged, fuel-injected engine delivers 181 hp (135 kW) and 597 lb·ft (809 N·m) at 1200 rpm. According to Paul Golevicz, Brand Marketing Manager at Kobelco, this output represents a 14% increase in engine torque and a 10% increase in swing torque compared to the current model, the SK250.
Four power modes on the new excavator allow the operator to match power to specific work operations. For heavy-duty excavation work, H Mode, which is the default mode, provides priority to the workload at high speed. S Mode provides fuel savings for standard digging and loading work. B Mode provides one-way hydraulic flow for breaker work, and A Mode provides two-way, two-pump flow for demolition work with the crusher/nibbler.
A power boost system provides 10% more power on command for increased bucket breakout force, without time limitations. The new excavator also provides 3400 lb (15 kN) more drawbar pull force compared to the previous model.
Viscous silicon cab mounts help to minimize vibration and shock to the cab, which has been designed to provide operator comfort, easy egress, and a clear view of the work site. A seven-position suspension seat can be adjusted to fit the comfort requirements of most operators, and all major controls—including hydraulics for tools and attachments, mode selection switches, and heavy lift and independent travel switches—have been placed to the operator’s right for easy access.
To reduce maintenance time and boost productivity, most routine service check points on the SK260LC have been placed at ground level, along with ready access to filters, batteries, and hydraulics. Side-by-side radiator, oil cooler and intercooler are also easily accessible for inspection and cleaning. The radiator can be removed for service without the need to drain the hydraulic system.
The SK260LC Acera Mark 8 is designed for applications requiring maximum power, from digging trenches and carrying and setting pipe and trench boxes, to backfilling, clearing sites, and loading trucks. With an operating mass of 57,300 lb (26,000 kg), the SK260LC digs to 23 ft (7.0 m), and provides a maximum reach of 33.3 ft (10.1 m) at ground line. It provides a bucket digging force of 41,100 lb (183 kN) and an arm digging force of 28,500 lb (127 kN).