Kubota K008-4 Mini Excavator – Parts, Specs & Serial Numbers

The Kubota K008-4 Mini Excavator is one of the smallest yet most efficient compact excavators in the Kubota lineup. Designed for confined urban spaces, interior demolition, and landscaping tasks, this zero-tail swing machine weighs under 2,500 lbs yet delivers strong digging performance.

Its Kubota D722-E3B diesel engine, expandable undercarriage, and simple joystick controls make it ideal for rental fleets, contractors, and DIYers alike. Despite its size, the K008-4 boasts reliable hydraulics, low fuel consumption, and reduced maintenance needs—without sacrificing operator comfort.

Key Specifications & Features

Engine

• Model: Kubota D722-E3B

• Type: 3-cylinder, liquid-cooled, diesel, Tier 4 Final

• Displacement: 0.719 L (43.9 cu in)

• Power Output: 10.3 hp (7.7 kW) @ 2,050 RPM

Hydraulics

• Total Hydraulic Flow: 5.5 GPM

• Hydraulic Pressure: 2,486 psi (171.4 bar)

• Hydraulic System Type: Open center

• Boom Swing Angle: Left 55°, Right 60°

Transmission & Travel

• Travel Speeds: Low – 1.1 mph | High – 2.5 mph

• Swing Speed: 8.3 RPM

Dimensions

• Operating Weight: 2,200 lbs (998 kg)

• Max Digging Depth: 5 ft 8 in (1.73 m)

• Max Reach at Ground: 10 ft 0 in (3.05 m)

• Undercarriage Width: Adjustable 2 ft 10 in – 3 ft 3 in (700–860 mm)

Performance

• Bucket Breakout Force: 2,200 lbf

• Arm Digging Force: 1,010 lbf

• Zero Tail Swing: Ideal for tight access jobs

Maintenance Essentials & Common Parts

• Hydraulic cylinder seal kits

• Rubber tracks (180mm)

• Final drive motors

• Engine filters and belts

• Control valve and seal kits

Pro Tip:

Check and clean the hydraulic oil cooler and fan guard regularly to avoid overheating in small-frame machines like the K008-4.

Common Issues & Quick Fixes

Track Slippage or Jamming

Often caused by worn or misaligned tracks. Replace with 180mm rubber tracks and inspect tensioning system.

Hydraulic Drifts in Boom or Arm

Typically due to worn seals or control valve issues. Rebuild using cylinder seal kits.

Engine Overheating

Check for blocked radiator screens or old coolant. Replace with engine maintenance kits.

Serial Number Location

The serial number plate is located on the right side of the machine, near the undercarriage or just behind the boom arm. Always verify this when ordering parts to ensure model accuracy.