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Mini Excavators


  • Operating Weight 7,672 lb | 3480 kg
  • Engine Power 23.1hp | 17.2 kW

CX31B Mini Excavator

The CASE CX31B mini excavator features a heavy duty undercarriage with heavy plate guards that prevent damage to hydraulic motors, making it an excellent addition to any utility or landscape fleet. The optional angle blade decreases the time required to backfill a trench while options such as thumbs and augers increase the machine’s productivity, maneuverability, and performance. Ground level fluid checks make daily maintenance quick and easy, resulting in maximized uptime.

A great fit for:
  • Roads & Bridges
    Roads & Bridges
  • Rental
  • Non-Residential Construction
    Non-Residential Construction
  • Residential Construction
    Residential Construction
  • Utilities
CX31B Specifications
CX31B Specifications
File size 964.73 kb
CX B Series Brochure
CX B Series Brochure
File size 13.27 Mb
CX31B Bid Specifications
CX31B Bid Specifications



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.


Standard Equipment

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  • 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

Optional Equipment

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  • Steel tracks
  • 5 ft 4 in (1.62 m) arm
  • Mechanical coupler
  • Travel alarm
  • Additional counterweight
  • Arm/bucket cylinder rod cover
  • Air filter double element
  • 4-way backfill blade
  • Rotating beacon


  • Cab enclosure with heater and AC
  • Radio
  • Operator front guard
  • Rearview mirror
  • Rear under mirror
  • LCD Monitor


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Base & Extended Warranty Coverage

  • 12 Month / 1,000 Hour Full Coverage Base Warranty

Purchased Protection

Purchased Protection Plan is an extension of the factory base and extended coverage is available at an additional cost. Your CASE dealer can help you determine the plan that fits your needs. Plans are available up to three-years / 3,000 hours on CASE Compact Excavator models.

Please see your CASE dealer for limitations, exclusions, and confirmation of policies in effect. The CASE Warranty remains in effect during the Warranty Period if the owner performs the required maintenance at the recommended intervals outlined in the product’s operator’s manual and the unit is operated within its rated capacity. Genuine CASE service parts or CASE approved service parts that meet CASE specifications must be used for maintenance and repairs.


CASE dealers provide world-class equipment and aftermarket support, industry-leading warranties and flexible financing.

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