Accessing and Replacing Brake Bands on the John Deere 450 Dozer

[MikePhua]

Introduction to the John Deere 450 Dozer
The John Deere 450 series dozers, introduced in the 1960s, have been a staple in the heavy equipment industry due to their durability and versatility. These machines are equipped with steering clutches and brake bands that play a crucial role in maneuvering and stopping the dozer. Over time, components like the brake bands may wear out or become damaged, necessitating maintenance or replacement.
Symptoms Indicating Brake Band Issues
Operators may notice several signs that suggest problems with the brake bands:

• Reduced Braking Efficiency: The dozer may not stop as quickly or effectively as usual.
  
• Unusual Noises: Grinding or squealing sounds when applying the brakes.
  
• Uneven Track Movement: One track may move faster than the other, indicating uneven braking.
  
• Fluid Leaks: Hydraulic fluid leaking near the brake assembly.
  

Accessing the Brake Bands
To inspect or replace the brake bands on a John Deere 450 dozer, follow these steps:

1. Lift the Operator's Station: Carefully raise the operator's seat and platform to access the brake linkage.
   
2. Remove the Fuel Tank: Detach the fuel tank to gain better access to the brake components.
   
3. Remove the Tracks: In some cases, it may be necessary to remove the tracks to facilitate easier access to the brake assembly.
   
4. Remove the Final Drive: Detach the final drive assembly to access the brake band and clutch components.
   

Replacing the Brake Bands
Once access is gained, follow these steps to replace the brake bands:

1. Remove the Old Brake Band: Carefully detach the worn or damaged brake band from its housing.
   
2. Inspect Components: Check the brake drum and other related components for wear or damage.
   
3. Install the New Brake Band: Place the new brake band into position, ensuring it is properly aligned.
   
4. Reassemble Components: Reattach the final drive, tracks, fuel tank, and operator's station.
   
5. Test the Brakes: Operate the dozer to ensure the new brake band functions correctly.
   

Maintenance Tips
To prolong the life of the brake bands:

• Regular Inspections: Periodically check the brake components for signs of wear or damage.
  
• Proper Lubrication: Ensure all moving parts are adequately lubricated to reduce friction and wear.
  
• Clean Environment: Operate the dozer in clean conditions to prevent debris from entering the brake system.
  

Conclusion
Maintaining the brake bands on a John Deere 450 dozer is essential for safe and efficient operation. By following the proper procedures for access and replacement, and adhering to regular maintenance practices, operators can ensure their dozers remain in optimal working condition.