Hitachi EX120 Excavator Detailed Overview

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Machine Introduction
The Hitachi EX120 is a mid-sized hydraulic excavator widely utilized for construction, landscaping, and utility work. It balances robust performance with efficient fuel consumption and operator comfort, making it suitable for a diverse range of excavation tasks. Known for durability and reliability, the EX120 offers excellent reach, digging depth, and hydraulic power within its class.
Key Specifications

• Operating Weight: Approximately 27,600 lbs (12,500 kg)
  
• Engine Power: About 81 horsepower (60.4 kW) from a turbocharged 4-cylinder Isuzu A-4BG1T diesel engine
  
• Engine Speed: 2,100 rpm rated
  
• Fuel Tank Capacity: Approximately 250 liters (66 US gallons)
  
• Digging Depth: Roughly 5.5 meters (18 ft) depending on boom and stick configurations
  
• Maximum Reach: Around 7.5 meters (24.5 ft)
  
• Bucket Capacity: Typical range from 0.3 to 0.9 cubic yards (0.23 to 0.69 cubic meters)
  
• Hydraulic Pump Flow: 190 liters per minute (50.2 gallons per minute)
  
• Operating Pressure: Approximately 4,980 psi (34,335 kPa)
  
• Travel Speed: Up to 5.5 km/h (3.4 mph)
  
• Ground Pressure: About 5.4 psi (37 kPa) reducing impact on ground surfaces
  
• Track Configuration: Typically 44 shoes per side, shoe width about 500 mm (19.7 inches)
  

Performance Features

• The EX120 utilizes Hitachi’s proprietary hydraulic system delivering smooth and responsive control over boom, arm, bucket, and swing functions.
  
• Its turbocharged engine provides sufficient power for challenging digging and lifting operations, optimized for fuel efficiency.
  
• Operator comfort is enhanced by a spacious cab with ergonomic controls, adjustable seating, and excellent visibility. Climate control options improve work conditions in varied environments.
  

Maintenance Insights

• Routine checks for hydraulic fluid levels, engine oils, and coolant are vital for preserving machine health.
  
• Regular inspection of undercarriage components such as track tension, rollers, and shoe condition helps prevent unnecessary wear and prolongs service intervals.
  
• Filter replacements and scheduled servicing as per Hitachi guidelines ensure optimal machine performance and reduced downtime.
  

Applications
The EX120 excels in medium-duty excavation projects including utility installation, site preparation, trenching, and landscaping. Its balanced size and capabilities afford easy transport and deployment on diverse job sites, making it a preferred choice for contractors needing a dependable, adaptable excavator.
Glossary

• Operating Weight: Total weight of the excavator including fluids and attachments.
  
• Hydraulic Pump Flow: Volume of hydraulic fluid delivered to components, affecting movement speed and force.
  
• Ground Pressure: Pressure exerted on the surface by the machine, important for working on sensitive terrain.
  
• Turbocharged Engine: An engine equipped with a turbocharger to increase power and efficiency by forcing more air into the combustion chamber.
  
• Bucket Capacity: Volume of material the bucket can carry in a single scoop.
  

Summary
The Hitachi EX120 stands as a reliable and efficient mid-sized hydraulic excavator suited for a wide range of construction and earthmoving tasks. Combining proven engine performance, advanced hydraulics, and operator-centric design features, it delivers consistent power and precise control. Proper maintenance and operation ensure long-term durability and productivity across diverse working environments.