Equipment Spotlight: Reduced/Zero Tail Swing Excavators

April 2011 Vol. 66 No. 4

Bobcat
Bobcat_E50_Excavator.jpeg
With a tail swing of less than an inch, the new Bobcat E50 compact excavator can work in confined areas. An operating weight of 10,677 pounds and an overall width of 77.2 inches make it easy to transport, while a bucket breakout force of 9,442 pounds provides power for tough conditions. Redesigned hydraulics with a load-sensing pump and closed center-valve system provide improved, refined control of machine travel and work-group operation. Cushioned work-group cylinders offer smooth end-of-stroke for precise control. The E50 comes with an Auto-Idle feature, which if activated by the operator, automatically returns the engine to idle if excavator functions are not used for a period of four seconds, saving fuel and reducing jobsite noise. The E50 is available with a long arm option that maximizes dig depth, reach and dump height clearance. 866.823.7898, www.bobcat.com/excavators

Komatsu America
The model PC138USLC-8 short tail swing excavator has a net 92 hp and an operating weight of 31,107 to 32,568 pounds. The engine utilizes an electronic multi-staged fuel injection system and isochronous control that maintains engine speed during heavy loads. The engine is EPA Tier 3 emissions regulations ready. The PC138USLC-8 provides excellent lifting power and stability, while reducing the tail-swing radius by 27 percent. The single pump double-flow system and pump flow merge divide valve improves swing acceleration and steering performance. The 7-inch monitor enables accurate smooth work and displays data in 12 languages for global support. The multi-function color monitor has a Power Mode, Economy Mode, Lifting Mode, Breaker Operation and Attachment Mode. This excavator offers fingertip command of two different breaker and attachment flow selections, providing four flow settings that can be easily adjusted to match the demand of the attachment on hand. www.komatsuamerica.com