Kubota KX91-3 Mini Excavator Overview

[MikePhua]

Machine Background
The Kubota KX91-3 mini excavator is designed for compactness, strength, and versatility, making it ideal for landscaping, utilities, and construction tasks. It features a powerful yet efficient Kubota D1503-M diesel engine delivering 28 hp, balanced with precision hydraulics and a durable undercarriage for maneuverability in tight spaces.
Engine and Hydraulic System

• Engine model: Kubota D1503-M, a 3-cylinder diesel engine of 91.5 cubic inches (1.5 liters) displacement.
  
• Rated output: Approximately 28 hp at 2300 rpm, meeting emission standards.
  
• Hydraulic system includes 2 variable pumps plus 1 gear pump delivering a total output of about 27.3 gallons per minute.
  
• Hydraulic fluid capacity of 9.5 gallons supports smooth, responsive operation of boom, arm, and track drives.
  

Dimensions and Weight

• Operating weight: Approximately 7,110 lbs (3,225 kg) including operator weight.
  
• Overall length: About 15.7 feet (4,795 mm).
  
• Overall width to outside of tracks: Approximately 5.1 feet (1,550 mm).
  
• Transport height: Approximately 8 feet (2,440 mm).
  
• Minimum tail turning radius: Roughly 4.3 feet (1,310 mm).
  
• Ground clearance near 0.97 feet (295 mm) allows effective maneuvering over uneven terrain.
  

Performance and Reach

• Maximum digging depth: Around 10.4 feet (3,175 mm).
  
• Maximum reach at ground level about 16.8 feet (5,130 mm).
  
• Maximum dumping height near 11.6 feet (3,530 mm).
  
• Boom swing reaches 80 degrees to the left and 50 degrees to the right for flexible digging angles.
  
• Swing speed around 9 rpm allows smooth rotation for accurate positioning.
  

Operator Comfort and Controls

• ROPS canopy or enclosed cab options offering operator protection.
  
• Ergonomic seat with adjustable suspension enhances comfort.
  
• Simple, intuitive controls with joystick operation provide precise machine handling.
  
• Excellent visibility with thoughtfully placed windows and compact body design.
  

Attachments and Versatility

• Compatible with hydraulic thumbs, breakers, augers, and quick couplers.
  
• Ideal for a variety of jobs including trenching, site prep, utility work, and landscaping.
  
• The machine’s compact size enables access to tight or confined job sites.
  

Glossary of Terms

• ROPS: Roll-Over Protective Structure to protect operator safety.
  
• Hydraulic Pumps: Components that move hydraulic fluid to power the machine's functions.
  
• Boom Swing: The lateral movement range of the excavator’s boom.
  
• Quick Coupler: Attachment system allowing fast and easy tool changes.
  
• Swing Speed: Rotational speed of the upper structure.
  

Conclusion
The Kubota KX91-3 mini excavator provides a powerful and agile solution for medium-sized excavation tasks where space is limited. Its combination of a reliable engine, responsive hydraulics, and operator comfort features delivers high productivity. Widely used in various industries, the KX91-3 offers excellent value for contractors seeking a compact yet capable excavator for versatile operations.