Case CX31B

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The CX31B mini excavator provides parallel, unobstructed operation near obstacles, tree lines, and foundations thanks to the zero tail swing design and independent center swing boom. Rapid machine positioning and simultaneous moves of the swing boom and house are accomplished via the foot pedal swing-boom control.

Fuel Efficiency

The new CX31B mini excavator features a Tier 4 Final engine to boost fuel efficiency and deliver faster response times while meeting environmental standards.

Comfort and Visibility

While operating the Tier 4 Final CX31B, the three post canopy provides exceptional visibility to all areas. For operators working in inclement weather, an enclosed cab with both heat and air conditioning are available options. Responsive performance and low fatigue are delivered through the smooth, intuitive pilot controls.


Get service and diagnostics done quickly and easily with a one-piece, swing-out side access panel. Grouped hydraulics and rear engine access provide the ability to do daily checks in no time at all.



  • Yanmar 3TNV88F-E diesel
  • 4 Cycle
  • Water cooled
  • Direct injection
  • One touch decelerator
  • Engine access under rear hood
  • Dry type air cleaner with restriction indicator
  • Glow plug starting aid



  • ROPS/FOPS three post canopy
  • Pilot operated hand controls and foot pedals
  • Adjustable seat w/ seat belt
  • Arm rests
  • Display includes: Engine oil pressure, Water temperature lamp, Low fuel warning lamp, Battery charge lamp, Water temperature gauge, Fuel gauge, Hour meter



  • Rubber tracks
  • Automatic 2-speed travel
  • Fully hydrostatic drive system
  • Sealed and lubricated track rollers
  • Track tension adjustment – grease type
  • Disc type parking brake – auto release and apply



  • 12-volt electrical starting system
  • Heavy-duty battery
  • Horn



  • Zero tail swing
  • Swing lock
  • Swing brake
  • Swing shock valve



  • Swing boom – 70° left/60° right
  • Hydraulic backfill blade