Designed to maneuver in tight work sites without sacrificing stability when working, Kobelco Construction Machinery America’s new 17SR Acera zero tailswing, compact excavator features an adjustable track gauge and a new three-pump smart hydraulic system.
Powered by a three-cylinder, U.S. EPA Tier III-certified Mitsubishi diesel engine that delivers 15.2 hp (11.3 kW) at 2200 rpm, the 17SR can travel at 1.2 mph (1.9 km/h) in low or at speeds up to 2.5 mph (4.0 km/h) in high speed. Its hydrostatic drive system incorporates two main axial piston-type hydraulic pumps that each provide 4.3 gal/min (16.3 L/min).
The 17SR features a smart hydraulic system that delivers 10% more hydraulic flow than in the 13SR this model replaces. Three pumps work together to allow simultaneous use of arm, bucket, travel, and swing systems, allowing the compact 17SR to operate like a larger series Kobelco excavator.
A hydraulically adjustable track allows the 17SR’s undercarriage width to be adjusted to a retracted position of 39 in (991 mm) for maneuvering tight spaces on the job site, or an expanded position of 52 in (1321 mm) that allows the excavator to operate with zero tailswing and the stability necessary for front and side lifting. An in-cab lever allows the operator to switch between expanded and contracted configurations without leaving the cab.
With a maximum operating mass of 3638 lb (1650 kg), the 17SR provides a maximum digging depth of 7.1 ft (2.2 m) and a bucket capacity of 0.88 to 1.55 ft3 (0.025 to 0.044 m3). Bucket breakout force of 2900 lb (12.9 kN) and an arm-crowding force of 2158 lb (9.6 kN) for the 17SR represent an 11% increase in total arm and breakout forces compared to the 13SR, according to Kobelco. The 17SR also offers 310 lb·ft (0.42 kN·m) of swing torque, 4474 lb (19.9 kN) of drawbar pull force, and a swing speed of 8.6 rpm.
Kobelco designed the 17SR’s cab for comfort and easy access by incorporating a three-post canopy that meets both rollover protection structure (ROPS) and falling object protective structure (FOPS) standards. The cab also incorporates an adjustable operator’s seat. Easy, ground-level access to the engine compartment, hydraulics, and routine maintenance checkpoints helps the operator streamline daily maintenance checks.