Hitachi EX200LC-3 Fluid Change and Maintenance Guide

[MikePhua]

Introduction
The Hitachi EX200LC-3 is a popular hydraulic excavator equipped with multiple fluid reservoirs essential for its optimal operation, including the hydraulic pump, swing motor, final drives, and engine. Proper fluid selection and timely changes ensure durability, performance, and machine reliability under heavy-duty construction conditions.
Hydraulic Pump Oil

• The hydraulic pump features a small dipstick to check fluid levels.
  
• Recommended oil for the hydraulic pump is typically a high-quality hydraulic oil with specifications matching Hitachi’s OEM recommendations, often ISO VG 46 hydraulic oil.
  
• The quantity depends on the specific system size but generally ranges from 25 to 35 liters; always refer to the service manual.
  
• Maintain fluid cleanliness to prevent pump wear and ensure smooth hydraulic actuation.
  

Swing Motor Oil

• The swing motor also has a dedicated dipstick for accurate level measurement.
  
• It commonly requires a GL-5 80W-90 gear oil or equivalent synthetic as per manufacturer guidance.
  
• The drain plug for the swing motor oil is usually located at the motor housing base; exact position varies by model and should be confirmed in the service manual.
  
• Regular oil changes protect gears and bearings by minimizing wear and corrosion.
  

Final Drive Oil

• Final drives, responsible for transmitting power to the tracks, use specialized gear oil, often similar to or the same as the swing motor’s oil.
  
• Follow OEM-recommended oil grades like GL-5 80W-90 or equivalent.
  
• Draining and refilling intervals depend on operating hours and conditions; a typical service interval might be every 1,000 hours.
  
• Ensure seals and breather valves are inspected during service to prevent contamination.
  

General Fluid Maintenance Tips

• Ideally, fluids should be changed at manufacturer-recommended intervals or sooner in harsh environments.
  
• Use genuine or high-quality aftermarket oils matching engine and component specifications.
  
• Monitor fluid levels regularly to detect leakage or consumption issues early.
  
• Dispose of used fluids according to environmental standards.
  

Glossary of Terms

• Hydraulic Oil: Specialized fluid for transmitting power within hydraulic systems.
  
• GL-5 Gear Oil: A classification indicating high-pressure gear oil suitable for heavy-duty gearboxes.
  
• Dipstick: An indicator tool to check oil fluid levels.
  
• Final Drive: The drivetrain component delivering power from the engine to the tracks or wheels.
  
• OEM Specifications: Manufacturer’s recommended standards for parts and fluids.
  

Conclusion
Changing the hydraulic, swing motor, and final drive fluids on the Hitachi EX200LC-3 is fundamental for maintaining system integrity and operational efficiency. Selecting appropriate oils and adhering to service intervals extend component life and avoid costly repairs. Utilizing service manuals for exact oil types, capacities, and drain locations will support proper maintenance routines, maximizing machine uptime and performance in demanding worksite conditions.