Kobelco SK850LC-11 Built to Speed Up Site Workflows

Kobelco Construction Machinery has updated its 85-tonne excavator with the SK850LC-11 — improving fuel efficiency, productivity and operator comfort instead of building a new machine.

The machine is still built for tough jobs like quarry work, mega projects, and large-scale digging. But Kobelco is making the case that this version will simply do more in less time. 

With the standard 11-foot 10-inch arm, it offers a bucket digging force of 90,600 pounds, an arm digging force of 69,900 pounds, and a lifting capacity of 66,010 pounds. 

“Customers will find the SK850LC-11 lets you load more trucks and move more material more efficiently,” the company says.

The biggest mechanical change is under the rear bonnet, where the 510-horsepower Hino engine has been replaced by a 512-horsepower Tier 4 Final Isuzu engine. It uses a diesel oxidation catalyst and an SCR system, eliminating the need for a diesel particulate filter.

Kobelco has also increased the size of the DEF tank, stretching out service intervals so operators are not constantly pulled away for refills.

Where the SK850LC-11 really tries to distinguish itself, though, is in the hydraulics. The Boom-to-Arm Hydraulic Regeneration System is designed to recover energy that would otherwise be wasted during operation. 

As Kobelco explains, it “uses the downward force generated by the boom’s weight to push fluid to the excavator arm cylinder.” It is a small line in the specification sheet, but one that speaks to the broader push toward efficiency gains in heavy machinery without sacrificing output.

A suite of automation features supports that same aim. Eco Mode trims fuel consumption during lighter work. Auto Idle Stop shuts the engine down after five minutes of inactivity when the safety lock lever is raised. 

Auto Engine Deceleration brings revs down automatically when the controls are centred. 

READ MORE: Kobelco SK1300DLC-11 Redefines Demolition Work

The machine also tries to stay productive during more complex movements. Independent Travel allows operators to lift, swing, carry and move across site simultaneously by splitting hydraulic duties between two pumps — one dedicated to travel, the other to all remaining functions. It is a setup intended to keep response sharp even when everything is happening at once.

Operators can also choose between Heavy (H) Mode for maximum output, Standard (S) Mode for a more balanced approach, and a Power Boost function that provides a short burst of extra horsepower when conditions demand it. 

There is also auto warm-up for the engine and hydraulic oil, along with compatibility with breakers, an ISO/BHL pattern changer, and safety valves on the boom and arm.

Inside the cab, the changes are more immediately noticeable. The “All-New Cabin” across Kobelco’s -11 range is larger, with improved visibility and a stronger focus on ergonomics. The seat has been redesigned as a seven-way adjustable, heated air suspension unit, moving in sync with the armrests and hydraulic controls to reduce fatigue over long shifts.

Even the controls themselves have been rethought. “The operator’s pilot levers move horizontally without arching of the wrist, while also providing shorter lever strokes to deliver swifter, more precise movement,” the company says.

Taken as a whole, the SK850LC-11 is not trying to rewrite what an 85-tonne excavator is. Instead, it edges forward in small but deliberate steps — trimming fuel use, tightening control response, and making long days in the cab a little less punishing. 

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