Kobelco Construction Machinery America introduced the SK170 full-size, high-performance excavator to the Kobelco Mark 9 excavator series. These new Tier 4 models include the SK210, SK260, SK295, SK350 and SK485 Mark 9 excavators.
The versatile SK170 Mark 9 delivers up to a 10-percent improvement in both fuel efficiency and productivity, and provides more power and faster engine response. “The Mark 9 excavators are the most fuel efficient machines Kobelco has ever built,” said Reece Norwood, Kobelco platform manager.
Featuring an upgrade to Kobelco’s legendary intelligent hydraulics, the SK170 Mark 9 is equipped with the industry’s first selective catalytic reduction (SCR) emission solution for excavators. A new ROPS/FOPS certified cab provides a larger, more comfortable work environment, and a low engine cover and standard wide-angle rear-view camera improve operator visibility and productivity.
For improved system efficiency, the Kobelco SK170 Mark 9 also features a fully automatic engine and hydraulic warm-up system that warms the hydraulic circuit to an optimum 126° F (52° C). This feature helps make the operator more productive, more quickly, on the job.
“As with all the Mark 9 models, the SK170 continues Kobelco’s tradition as a technology leader,” Norwood said. “This new machine delivers the precise control and feel expert operators prefer. The SK170 Mark 9 can dig the trench, crane the pipe and finish with even better precision. Our new SCR solution will deliver more useable engine power and fuel efficiency.”
The Kobelco SK170 Mark 9 features an operating weight of 38,656 lbs (17,534 kg), a bucket digging force of 24,900 lb (11,300 kg) and a maximum dig depth of 21 ft 5 in (6.52 m). The new model delivers 115 net horsepower (86 kW).
Improved controllability and productivity
The upgraded Intelligent Total Control System™ (ITCS) incorporates the culmination of three generations of continuous improvement in hydraulic controls, based on extensive customer input and product testing.
“The SK170 Mark 9 excavator maximizes the unique capabilities of its Tier 4 Interim certified FPT engine and optimized hydraulics with the upgraded ITCS,” Norwood said. “ITCS recognizes the operator’s moves and assists by providing power where and when it is needed. It also provides hydraulic sensitivity for fine grading and leveling.”
Integrated swing priority, a Kobelco first, provides seamless and smooth transition of additional pump power to the swing function. Automatic hydraulic regeneration feeds the cylinder demanding oil first, with oil that is being pushed out of another cylinder. This requires much less energy than having to re-pump the oil again, and also allows the next action to happen with faster response. The independent travel feature, activated with a switch, dedicates a pump to travel motors for better movement while performing other functions, such as when handling pipe while moving to the trench.
“When it comes to controllability in multifunction applications, the Kobelco Mark 9 excavators set the industry standard,” Norwood said. “Operators will appreciate the impressive control and smoothness of the SK170 Mark 9. The added confidence will make them even more productive. The ease of operation makes a good operator a great operator, and allows a novice excavator operator to quickly become a good, productive one.”
Controllability upgrades to the new excavator include new low-effort joysticks with proportional controls for the auxiliary hydraulics.
“When the work demands more power and faster engine response, the Power Boost™ feature on the SK170 Mark 9 delivers 10-percent more bucket breakout force on command for as long as you need it,” Norwood said. “For optimized lifting and carrying, the Heavy Lift feature delivers 10-percent more lifting and swing capability on command, also without time limit.”
SCR engine technology
By choosing SCR technology for meeting Tier 4 Interim emissions regulations, Kobelco provides leadership in engine performance, productivity and fuel efficiency. SCR is an after-treatment only solution that allows the excavator’s engine to do what it does best – generate power. The high efficiency in the combustion process significantly reduces fuel consumption while improving power. SCR with diesel exhaust fluid (DEF) is also the preferred choice for working in extreme temperatures.
“At Kobelco, we know that operators can’t perform at their best if they’re not comfortable and confident,” Norwood said. “We have gone to extremes to ensure that our customers are at their best when operating our excavators.”
The larger, isolation-mounted cab on the SK170 Mark 9 excavator reduces noise and vibration and accommodates all operator sizes. The cab also features rollover (ROPS) and falling object (FOPS) protection, repositioned controls and moveable front and door windows. More glass improves visibility from the sides of the cab. An optional air-suspension seat with heated cushions provides additional operator comfort.
A wide-angle rear-view camera with an integrated monitor view panel expands the operator’s view to the back of the machine and keeps the operator informed and productive on the job.
Meeting a wide range of applications
One of the most productive machines in its size class, the Kobelco SK170 Mark 9 is engineered for a variety of applications, including road and bridge, sewer and underground utilities, and site development. Heavy-duty frames, booms, arms and undercarriages are standard on all Mark 9 excavators.
Plug-in capability for telematics is standard on all Mark 9 excavators. For even greater productivity and precision, all Kobelco Mark 9 excavators are compatible with grade control systems from leading suppliers to meet customer preference and applications.
A full selection of buckets, couplers and thumbs are offered to maximize the versatility of the Kobelco SK170 Mark 9.
One of the industry’s leading excavator manufacturers, Kobelco’s full range of excavators is found on major construction job sites and highway projects across North America. In addition to the Mark 9 excavator models, Kobelco also offers a full range of compact, short-radius, mid-size and Bladerunner excavators.
Dredging Today Staff, May 9, 2012; Image: kobelcoamerica