Kubota KX033-4 Mini Excavator – Parts, Specs & Serial Numbers

Description:

The Kubota KX033-4 Mini Excavator combines compact size with exceptional power, making it ideal for tight job sites that demand productivity without sacrificing digging force. With a spacious cab, advanced hydraulic performance, and a robust Kubota D1703-M-DI-E4 engine, the KX033-4 delivers reliability and comfort for long workdays.

Its standard AUX1 hydraulic circuit, optional angle blade, and upgraded control valve technology allow for smoother, simultaneous operation of the boom, arm, bucket, and swivel functions. This model is favored by landscapers, utility contractors, and property managers looking for professional-grade efficiency.

Key Specifications & Features

Engine

• Model: Kubota D1703-M-DI-E4

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

• Displacement: 1.647 L (100.5 cu in)

• Power Output: 24.8 hp (18.5 kW) @ 2,200 RPM

Hydraulics

• Total Hydraulic Flow: 24.0 GPM

• Auxiliary Hydraulic Flow: 13.2 GPM

• Hydraulic Pressure: 2,611 psi (180 bar)

• Standard AUX1 Circuit with Proportional Flow Control

Transmission & Travel

• Travel Speeds: Low – 1.8 mph | High – 2.9 mph

• Traction Force: 7,418 lbf

• Swing Speed: 9.0 RPM

Dimensions

• Operating Weight: 7,420 lbs (3,365 kg)

• Max Digging Depth: 10 ft 6 in (3.2 m)

• Max Reach at Ground: 17 ft 1 in (5.2 m)

• Track Width: 12.6 in (320 mm)

Performance

• Bucket Breakout Force: 7,659 lbf

• Arm Digging Force: 3,867 lbf

• Angle Blade (Optional): ±25° blade tilt for faster grading

Maintenance Essentials & Common Parts

• Final drive motors

• Hydraulic cylinder seal kits

• Rubber tracks and sprockets

• Control valve O-rings and seals

• Engine filters and maintenance kits

Pro Tip:

To avoid hydraulic overheating, regularly clean the radiator and oil cooler screens—especially during summer use or dusty jobsites.

Common Issues & Quick Fixes

Hydraulic Performance Lag

Often due to dirty auxiliary filters or worn O-rings. Use control valve rebuild kits to restore function.

Blade Won’t Angle

A faulty solenoid or bent cylinder can disable blade tilting. Inspect and replace using blade cylinder seal kits.

Track Tension Loss

Track slack typically results from leaking grease adjusters. Restore tension and replace with track adjuster components.

Serial Number Location

The serial number is stamped on a plate located on the front-right frame of the undercarriage near the boom arm. Always refer to this number when sourcing exact parts.