Comprehensive Maintenance Guide for the International Harvester TD20E Crawler Dozer

[MikePhua]

Introduction
The International Harvester TD20E Crawler Dozer, introduced in the late 1970s, is a robust piece of machinery renowned for its durability and versatility in heavy-duty applications. With an operating weight ranging from 47,000 to 48,000 pounds, it features a 6-way Power Angle Tilt (PAT) blade or a semi-U blade, making it suitable for tasks such as land clearing, road construction, and mining operations.
Engine and Fuel System Maintenance

• Oil and Filter Changes: Regular oil changes are vital to ensure engine longevity. It's recommended to replace the engine oil and filter every 250 hours of operation or annually, whichever comes first.
  
• Fuel System: The TD20E is equipped with a diesel engine that requires clean fuel for optimal performance. Replace fuel filters at regular intervals and inspect fuel lines for leaks or wear.
  
• Air Intake System: The air filter should be checked daily and replaced as necessary to prevent dust and debris from entering the engine, which can cause premature wear.
  

Hydraulic and Transmission Systems

• Hydraulic Fluid and Filter: The hydraulic system should be serviced regularly to maintain performance. Replace hydraulic fluid and filters every 500 hours of operation.
  
• Transmission Maintenance: Regularly check the transmission fluid level and condition. Replace the transmission fluid and filter as per the manufacturer's recommendations to ensure smooth operation.
  
• Final Drives: Inspect the final drives for proper lubrication and signs of wear. Replace the oil in the final drives after warming up the machine to ensure complete drainage.
  

Undercarriage and Track Maintenance

• Track Tension: Proper track tension is crucial for optimal performance. Adjust the track tension according to the specifications provided in the operator's manual.
  
• Track Links and Rollers: Regularly inspect track links and rollers for wear. Replace any components that show signs of excessive wear to prevent further damage.
  
• Track Lubrication: Ensure that all track components are properly lubricated to reduce friction and wear.
  

Cooling System

• Coolant Levels: Regularly check the coolant level and top up as necessary. Use the recommended coolant type to prevent corrosion and overheating.
  
• Radiator Maintenance: Inspect the radiator for debris and clean it as needed to ensure efficient cooling.
  

Electrical System

• Battery Maintenance: Check the battery terminals for corrosion and clean them as necessary. Ensure that the battery is securely mounted and that the electrolyte levels are adequate.
  
• Charging System: If the volt meter is not functioning, inspect the alternator and associated wiring for faults. A malfunctioning charging system can lead to battery discharge and operational issues.
  

Operator's Cabin and Controls

• Seat and Controls: Ensure that the operator's seat is in good condition and that all controls are functioning smoothly. Lubricate control linkages to prevent stiffness.
  
• Instrumentation: Regularly check all instruments and gauges to ensure they are operating correctly. Address any issues promptly to avoid operational disruptions.
  

Preventive Maintenance Tips

• Daily Inspections: Conduct daily inspections before operation to identify any potential issues early.
  
• Scheduled Servicing: Adhere to the recommended service intervals for oil changes, filter replacements, and other maintenance tasks.
  
• Record Keeping: Maintain detailed records of all maintenance activities to track the machine's service history and identify recurring issues.
  

Conclusion
The International Harvester TD20E Crawler Dozer is a reliable and powerful machine when properly maintained. By adhering to the recommended maintenance practices and addressing issues promptly, operators can ensure the longevity and optimal performance of their equipment. Regular maintenance not only enhances machine efficiency but also contributes to safety and cost savings in the long run.