Final Drive Fluid in International Harvester 175B

[MikePhua]

Introduction
The International Harvester 175B is a vintage crawler loader that gained popularity in the 1970s for its robust performance in construction and earth-moving tasks. As with any heavy machinery, proper maintenance is crucial to ensure longevity and optimal performance. One of the key aspects of maintenance is the lubrication of the final drive system.

Understanding the Final Drive System
The final drive in a crawler loader is responsible for transmitting power from the engine to the tracks, enabling movement. It consists of components such as gears, bearings, and seals that require adequate lubrication to function efficiently. In the case of the 175B, the final drive is integrated with the transmission system, sharing the same oil reservoir.

Recommended Lubricants
For the 175B's final drive, International Harvester recommends using SAE 90 weight gear oil. This oil provides the necessary viscosity and lubrication properties to protect the gears and bearings under heavy loads. It's important to use gear oil without extreme pressure (EP) additives, as these can be harmful to the bronze components within the final drive.

Maintenance Practices

• Regular Oil Changes: It's advisable to change the final drive oil every 500 hours of operation or annually, whichever comes first.
  
• Check Oil Levels: Regularly inspect the oil level to ensure it is within the recommended range. Low oil levels can lead to inadequate lubrication and potential damage.
  
• Inspect for Contaminants: During oil changes, check for metal shavings or other contaminants in the old oil, which could indicate wear or damage within the final drive components.
  

Troubleshooting Common Issues

• Overheating: If the final drive becomes excessively hot, it could be due to low oil levels, contaminated oil, or worn-out components. Addressing these issues promptly can prevent further damage.
  
• Unusual Noises: Grinding or whining noises may indicate gear wear or bearing failure. Regular maintenance and timely oil changes can help mitigate these problems.
  

Conclusion
Maintaining the final drive system of the International Harvester 175B is essential for ensuring the longevity and performance of the machine. By using the recommended SAE 90 weight gear oil and adhering to regular maintenance practices, operators can keep their 175B crawler loader running smoothly for years to come.