Removing Link on CAT E70B Tracks

[MikePhua]

When maintaining heavy equipment such as the CAT E70B, one critical aspect of upkeep is ensuring the tracks are properly adjusted and in optimal condition. Removing and replacing track links on the CAT E70B, or any similar excavator, is a task that requires attention to detail and the correct tools to avoid any damage to the machine or its components. In this article, we will guide you through the process of removing a track link, explain some of the necessary tools and techniques involved, and discuss common challenges that operators face while performing this task.
Understanding the CAT E70B Track System
The CAT E70B is equipped with a heavy-duty track system designed for maximum durability and traction in various terrain types. Its track assembly is made up of several key components, including the track chain, track links, sprockets, and idlers. Over time, wear and tear on these components can lead to the need for maintenance or replacement.
The track chain on the CAT E70B is made up of individual links that are connected to each other, and these links are crucial in ensuring the smooth operation of the machine. If a track link becomes damaged or worn out, it needs to be replaced. Removing a track link involves detaching the track from the rest of the system, which can be done using specialized tools.
Tools Required for the Job
Before starting the track link removal process, ensure you have all the necessary tools at hand. Some of the most common tools required for this task include:

• Track Pin Press or Hydraulic Puller: This tool is essential for removing the pins that connect the track links. A hydraulic puller is commonly used because it provides the necessary force to break the bond between the links and the pins.
  
• Wrenches and Socket Set: These are necessary for loosening any bolts that may be securing parts of the track assembly.
  
• Hammer or Sledgehammer: A heavy-duty hammer is often used to knock out pins or loosen any stuck components.
  
• Track Link Tool: A specialized tool used to remove track links and track pins.
  
• Lubrication: It's important to have some lubricant handy to prevent any rust from obstructing the pins or links.
  

Having the right tools not only makes the job easier but also reduces the risk of damaging other components during the removal process.
Step-by-Step Guide to Removing a Track Link

1. Lift the Excavator: Use the hydraulic system of the CAT E70B to lift the machine slightly off the ground, relieving pressure from the track. This will allow you to work with the track more easily. Always ensure that the machine is on a stable surface before proceeding.
   
2. Position the Track: Rotate the track so that the link you want to remove is positioned near the sprocket or the idler, depending on where you're working. You may need to adjust the track tension slightly to make the link more accessible.
   
3. Locate the Track Pin: The track pin connects the links together, and this is the component you need to remove. It's typically located in the middle of the track assembly. Inspect the pin and check for any rust, dirt, or debris that may make removal more difficult.
   
4. Use a Track Pin Press or Hydraulic Puller: Place the hydraulic press or track pin puller on the pin, aligning it with the center of the pin. Slowly begin applying pressure to extract the pin. The hydraulic system will help break the bond between the pin and the link, allowing you to remove it.
   
5. Remove the Track Link: Once the pin is out, carefully remove the track link. Depending on the condition of the link, it may come out easily or require some additional force. Be cautious not to damage the surrounding components.
   
6. Clean and Inspect: Before replacing the link, take the time to clean the area and inspect the remaining track assembly for wear. Look for any signs of damage, such as cracks in the track links or sprockets that may need to be addressed before reassembling the track.
   
7. Reinstall the Track: Once the damaged link has been replaced, reverse the process to reassemble the track. Insert the new track link and align the pin correctly. Use the track pin press or hydraulic puller to secure the new pin in place. Make sure the track is properly tensioned once all the components are back in position.
   

Common Challenges in Removing Track Links
While the process of removing a track link seems straightforward, there are a few challenges that operators often face:

• Rust and Corrosion: Over time, rust can form on the track pins, making it difficult to remove the pins without causing damage. Using lubricants, such as penetrating oil, and allowing the oil to sit on the pin for several minutes before attempting removal can help loosen it.
  
• Stubborn Pins: In some cases, the pins may become stuck due to dirt or debris in the track assembly. Applying a bit of heat to the pin or using a more powerful hydraulic press can often solve this issue.
  
• Incorrect Tools: Using the wrong tools can damage the track or make the removal process more difficult. It's important to use the right equipment, such as a track pin press or a hydraulic puller, to avoid damaging the track or the components.
  
• Misaligned Links: If the links are misaligned during reinstallation, it can cause problems with the smooth operation of the track. Always ensure that the new link is aligned properly before securing it with the pin.
  

Tips for Efficient Track Link Removal

• Regular Maintenance: Keeping the track components clean and lubricated can make track link removal easier in the future.
  
• Work in Pairs: It can be helpful to have a second person assisting, especially when dealing with larger, heavier links or stubborn components.
  
• Use Heat Cautiously: If you must apply heat to loosen rusted or stuck pins, do so cautiously and avoid overheating, which can weaken the metal.
  

Conclusion
Removing a track link on the CAT E70B excavator, while straightforward, requires the right tools, a solid understanding of the machine’s track system, and careful execution. By following the proper steps and being prepared for any challenges, operators can ensure that their tracks remain in excellent condition, thereby maximizing the longevity and performance of their equipment. Regular maintenance of the track system is crucial to prevent unnecessary wear and tear and to avoid costly repairs. Whether you’re a seasoned operator or a newcomer, understanding the intricacies of track link removal is an important skill in maintaining the overall health of heavy equipment like the CAT E70B.