International TD-12 Crawler Tractor

[MikePhua]

Introduction to the TD-12
The International TD-12 was a mid-sized crawler tractor introduced by International Harvester in 1981. Positioned between the TD-8E and TD-15C models, it aimed to fill a significant power gap in the company's crawler tractor lineup. The TD-12 was designed to offer enhanced performance and versatility for various construction and agricultural applications.
Engine and Powertrain Specifications

• Engine: The TD-12 was equipped with the International D-466B 6-cylinder diesel engine, delivering 110 horsepower (82 kW) at the flywheel. This engine was a turbocharged variant of the D-466 engine, offering improved power output compared to its predecessors.
  
• Transmission: The tractor featured a full power-shift torque converter transmission, providing three forward and three reverse speeds. This setup allowed for smoother operation and better control, especially in challenging terrains.
  
• Dimensions and Weight:
  • Length: 11 ft 7 in (3.53 m)
    
  • Width: 7 ft 6 in (2.29 m)
    
  • Height: 10 ft 1 in (3.07 m)
    
  • Operating Weight: Approximately 24,350 lbs (11,040 kg)
    

Design and Features
The TD-12 was built with durability and efficiency in mind. Its undercarriage was designed to distribute weight evenly, reducing ground pressure and enhancing traction. The crawler tracks were equipped with 37 pads per side, featuring alligator master links, which contributed to the tractor's stability and maneuverability.
Production and Legacy
Production of the TD-12 was relatively short-lived, spanning from 1981 to 1982. During this period, International Harvester transitioned its construction equipment division to Dresser Industries. As a result, the TD-12 was succeeded by the Dresser TD-12 model, which continued the legacy of the original design under new ownership.
Maintenance and Common Issues
Owners of the TD-12 have reported several common maintenance concerns:

• Track Wear: Due to the heavy-duty nature of the tractor, track components often experience significant wear. Regular inspection and timely replacement of track pads and links are essential to maintain optimal performance.
  
• Hydraulic System Leaks: The hydraulic system, responsible for powering various attachments, can develop leaks over time. Routine checks and maintenance can help prevent potential issues.
  
• Cooling System Maintenance: Ensuring the radiator and cooling system are free from debris and functioning correctly is crucial to prevent engine overheating.
  

Conclusion
The International TD-12 crawler tractor remains a testament to International Harvester's commitment to producing reliable and powerful machinery. While its production was brief, its impact on the construction and agricultural sectors was notable. For enthusiasts and collectors, the TD-12 represents a significant chapter in the evolution of crawler tractors.