Page added to favorites


Mini Excavator


Maximize your productivity

The CASE CX31B 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:
  • Residential Construction
    Residential Construction
  • Utilities
  • Rental
CASE Product Line
CASE Product Line
File size 1.23 Mb



The centrally-pivoted boom allows for an accurate excavation, close to a fixed object.


A hydrostatic drive system and joystick control make mini excavators easy to be operated.


The auxiliary hydraulic system allows using several accessories, such as hydraulic hammer, drill and claw.



Open Close


Parallel, unobstructed operation near obstacles, tree lines, and foundations can be done with 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. Machine stability and backfilling are provided by the hydraulically-controlled backfill blade. For quicker backfilling of trenches an optional angle blade is available. Surface damage is kept to a minimum due to the standard, durable rubber tracks while optional steel tracks provide even greater protection.


The Yanmar engine is powered to match the performance of the CX31B. This engine meets the current Tier 4 Interim environmental standards and while consuming less fuel. The CASE Compact Excavators also feature a one touch deceleration to minimize fuel usage while not in operation. Finally, the integrated-flow pump system (IFPS) efficiently manages the pump flow during operation to maximize the use of engine power and increase the fuel efficiency.


The three post canopy provides exceptional visibility to all areas while operating the CX31B. For operators working in inclement weather, an available enclosed cab with heat or with heat and air conditioning are available options. Responsive performance and low fatigue are delivered through the smooth, intuitive pilot controls. A standard pattern selector allows operators to choose their control pattern preference for optimum productivity.


Get service and diagnostics done quick and easy 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.


Open Close
Make / model Yanmar 3TNV88-PYB
Net power @ RPM 28,4 hp (21,2 kW) @ 2400 rpm
Max travel speed, fwd 4,5 km/h (2,8 mph)
Main pumps total flow 76 l/min (20,2 gpm)
Boom swing L/R 70° / 60°
Arm breakout force, normal, SAE 17,2 kN (3.867 lbf)
Max dig depth 2.790 mm (9' 2")
Reach at ground level 4.800 mm (15' 9")
Dump height 3.350 mm (11' 0")
Max dig depth of vertical wall 2.160 mm (7' 1")
Operating Width(retracted) N/A
Operating Width(extended) N/A
Lift over end, 10' (3050 mm) radius 1.184 kg (2.610 lb)
Lift over side, 10' (3050 mm) radius 513 kg (1.130 lb)
Bucket breakout force, normal, SAE 37,5 kN (8.430 lbf)
Height to top of cab 2.570 mm (8' 5")
Minimum swing radius (overhang) 0
Transport length 4.370 mm (14' 4")
Ground clearance 330 mm (12,9")
Operating weight 3.030 kg (6.679 lb)

Standard Equipment

Open Close


  • ROPS/FOPS three post canopy.
  • Operator’s controls: pilot operated hand controls and foot pedals.
  • Display includes: engine oil pressure, water temperature lamp, air filter lamp, water separator detection lamp, low fuel warning lamp, battery charge lamp, glow plug indicator lamp, water temperature gauge, fuel gauge and hourmeter.
  • Adjustable seat with seat belt.
  • Arm rests.


  • Yanmar 3TNV88-BPYB 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.


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


  • Auxiliary hydraulics (single/bi-directional) and plumbing to arm.
  • Large hydraulic oil cooler.
  • Control pattern selector valve.


  • 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).


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


  • Swing boom (70° left/60° right). Hydraulic backfill blade.


Open Close


  • ROPS/FOPS closed cabin with heater and air conditioning.


  • Steel tracks, Arm with 5’4” (1.62m).
  • Mechanical coupler.
  • LCD Monitor.
  • Quick pipe clamps.
  • Arm/bucket cylinder rod cover.
  • Radio
  • Cabin front cguard.
  • Additional hydraulic line for swing.
  • 5’ 4” (1.62m) Arm, Additional counterweight.


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

To start your search, please enter the following information:

Search now

What can we help you find?

0 result (s) found
Filtered by:

No results found

Click this icon throughout the site to add pages to your favorites.

My CASE favorites

0 result (s) found