The Kubota KX71-3 is a versatile 3-ton class mini excavator known for its compact design, strong breakout force, and easy service access. Designed with a conventional tail swing and a wide working range, the KX71-3 is ideal for trenching, grading, utility work, and residential construction. Its robust performance and reliability have made it a go-to machine for contractors and rental companies alike.
Key Specifications:
Engine:
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Model: Kubota V1505-E2-BH-1
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Type: 4-cylinder, liquid-cooled diesel
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Displacement: 91.5 cu in (1.498 L)
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Gross Power: 23.5 hp (17.5 kW) @ 2,350 rpm
Transmission & Travel:
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Travel Speed: Low: 1.6 mph (2.6 km/h), High: 2.9 mph (4.6 km/h)
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Drive Motors: Hydraulic piston motors with 2-speed automatic downshift
Hydraulic System:
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Pump Capacity: 32.2 + 32.2 + 19.2 l/min (triple pump system)
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Auxiliary Flow: 13.2 gpm (50 L/min)
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Max Hydraulic Pressure: 2,560 psi (176 bar)
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Controls: Pilot-operated joystick with auxiliary circuit
Dimensions:
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Operating Weight: 6,305 lbs (2,860 kg)
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Max Digging Depth: 9 ft 9 in (2.97 m)
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Max Reach at Ground Level: 15 ft 9 in (4.8 m)
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Tail Swing Radius: 3 ft 5 in (conventional)
Performance:
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Bucket Breakout Force: 6,350 lbf (28.3 kN)
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Arm Digging Force: 3,290 lbf (14.6 kN)
Maintenance & Common Parts:
Routine Maintenance Schedule:
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Engine oil/filter: every 250 hours
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Hydraulic fluid/filter: every 500 hours
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Air filter: inspect every 100 hours
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Grease pivot points and track rollers: daily during use
Frequently Replaced Parts:
Common Issues & Quick Fixes:
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Hydraulic thumb not working: Check the auxiliary valve flow rate and switch—replace faulty joystick or control valve components.
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De-tracking or rough travel: Likely due to worn sprockets or loose track tension—adjust or replace with track and undercarriage kits.
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Low hydraulic power: Often due to clogged filters or failing pump—replace filters and inspect lines for contamination.
Pro Tips:
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Keep the auxiliary circuit capped when not in use to prevent debris from contaminating the system.
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Use the blade float function when grading or backfilling for smoother operation.
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Monitor idler wear monthly—early replacement can prevent costly undercarriage repairs.
Serial Number Location:
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Located on a metal plate on the front-right side of the frame, near the boom swing pivot, and inside the cab below the operator seat.
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Always reference the serial number before ordering Kubota KX71-3 parts to ensure compatibility.
