How to Reinstall a Track on a CAT 955L: A Step-by-Step Guide

[MikePhua]

When a track comes off a crawler machine like the CAT 955L, it can cause significant downtime if not addressed promptly. However, reassembling the track is not an overly complicated process, as long as proper procedures are followed. This guide will walk you through the steps to safely and efficiently reinstall a track on a CAT 955L, a piece of machinery commonly used for various earthmoving tasks like grading, digging, and hauling.
Understanding the Components Involved
Before diving into the reinstallation process, it’s essential to have a basic understanding of the components involved in a tracked system:

• Track Links: These are the individual metal links connected by pins that form the continuous loop of the track.
  
• Track Rollers: These are cylindrical components that help guide the track as it moves over the ground.
  
• Idlers: These are the large wheels located at the front and rear of the machine that help guide the track.
  
• Track Adjuster: A device that controls the tension in the track to ensure it is neither too tight nor too loose.
  
• Sprocket: The toothed wheel that engages the track links and drives the movement of the machine.
  

When a track comes off, it typically indicates that there is an issue with one or more of these components. Whether it's a failed track adjuster, a worn sprocket, or an obstacle in the machine's path, the track must be carefully put back into place to ensure smooth and efficient operation.
Step-by-Step Process for Reinstalling the Track
Here’s a detailed step-by-step guide on how to reinstall the track on your CAT 955L:

1. Ensure Safety First
   Before attempting any maintenance or repair, ensure that the machine is powered down and securely supported. Use wheel chocks to prevent the machine from rolling, and engage any available safety features, such as parking brakes or locking mechanisms.
   
2. Inspect the Track and Components
   Take a moment to inspect the condition of the track itself. Look for signs of wear such as cracks, broken links, or missing pins. Also, check the sprocket, rollers, idlers, and the track adjuster. Ensure that the track adjuster is functioning properly and that there are no loose or damaged components that could cause further issues.
   
3. Lift the Machine
   To remove the tension from the track, use a hydraulic jack or other lifting equipment to raise the machine off the track. This will make it easier to move the track back into position. Be cautious when lifting to avoid damaging any components or compromising the machine's stability.
   
4. Remove the Track Adjuster
   Once the machine is lifted and the track is relaxed, locate the track adjuster. Use the appropriate tools to remove it, ensuring you carefully store the fasteners for reassembly. The adjuster may be located at the rear of the machine, near the idler. Remove any dirt or debris from the area to prevent contamination during the reinstallation process.
   
5. Check the Sprocket
   Inspect the sprocket for any damage or excessive wear. If the teeth are significantly worn down or broken, consider replacing the sprocket. If the sprocket is in good condition, proceed to the next step.
   
6. Align the Track
   Carefully lift the track and begin to align it with the sprocket and idlers. You may need to move the machine slightly forward or backward to ensure that the track is properly aligned. This step is crucial to avoid putting undue pressure on any part of the track system during the reinstallation.
   
7. Reinstall the Track Adjuster
   Once the track is aligned correctly, reinstall the track adjuster. Make sure it is properly seated and that the tensioning system is operating correctly. Tighten the fasteners securely but avoid over-tightening, which could damage the adjuster or surrounding components.
   
8. Check the Track Tension
   After the track is back in place and the adjuster is reinstalled, check the track tension. The track should be neither too tight nor too loose. A track that is too tight can cause undue strain on the track system, while a loose track can lead to skipping, jumping, or even coming off again. Use the appropriate tools to adjust the tension, ensuring that it meets the manufacturer’s specifications.
   
9. Lower the Machine
   Once the track is properly installed and tensioned, carefully lower the machine back to the ground. Once the machine is back on its tracks, check the alignment once again to ensure everything is properly in place.
   
10. Test the Track
    With everything reassembled, start the machine and run it at a low speed. Carefully observe the track as it moves, ensuring that it is running smoothly without any unusual noise or issues. If the track slips, jumps, or becomes loose again, it may indicate an issue with the adjuster or other components that need further inspection.
    

Common Issues and Troubleshooting
Even with proper reinstallation, certain issues can still arise. Below are some common problems and how to troubleshoot them:

• Track Misalignment: If the track is misaligned after reinstallation, it could be due to improper alignment during the process. Double-check the sprocket, idlers, and rollers for wear and adjust the tension if needed.
  
• Loose Track: If the track becomes loose again, it could indicate that the track adjuster is malfunctioning or there is a problem with the track itself. Inspect the adjuster and the track links for damage.
  
• Uneven Wear: If the track begins to wear unevenly after reinstallation, it may suggest that the track is not properly aligned or that the machine is running with a misbalanced load. Regular inspections can help prevent this problem.
  

Real-World Example: Lessons Learned from a CAT 955L Track Incident
In one case, a fleet owner reported a tripped-up track issue with their CAT 955L. After a few hours of operation, the track slipped off, causing a delay in a critical project. Upon inspection, it was found that the track adjuster had been malfunctioning due to a buildup of dirt and debris, which led to uneven tension on the track. After reinstallation, the owner made sure to clean and lubricate the adjuster regularly to avoid a recurrence.
Conclusion
Reinstalling a track on a CAT 955L is a manageable task when approached methodically. By following the correct steps, inspecting all components, and taking necessary precautions, you can safely and efficiently get your machine back up and running. Regular maintenance and inspection of the track system will help prevent similar issues from arising in the future, ensuring the longevity and reliability of your machine.
By keeping your machine in top condition, you can avoid unnecessary downtime and keep your projects on track.