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Writer's pictureRALPH COPE
Jun 124 min read

The Unsung Heroes of Excavator Undercarriage: Rollers

Updated: Jun 23


Excavators are the workhorses of the construction and mining industries, tirelessly performing tasks that range from digging trenches to lifting heavy loads. At the heart of these powerful machines is a component that often goes unnoticed but plays a crucial role in their operation: the rollers. These unsung heroes are part of the undercarriage and are essential in keeping the tracks in motion. In this comprehensive guide, we’ll delve into what excavator rollers are, their functions, the common causes of damage, signs of failure, and how to replace them with high-quality used OEM parts from Vikfin.


What Are Excavator Rollers?

Excavator rollers, also known as track rollers or bottom rollers, are cylindrical components located on the undercarriage of an excavator. They serve as a support system for the machine’s tracks, ensuring that the tracks remain in place and move smoothly. There are two main types of rollers found in an excavator's undercarriage:

  1. Carrier Rollers (Top Rollers): These are located on the top side of the track frame and help to support the upper portion of the track.

  2. Track Rollers (Bottom Rollers): These are positioned on the lower side of the track frame and support the weight of the excavator, allowing the tracks to move along the ground.


Functions of Excavator Rollers

The primary functions of excavator rollers include:

  1. Supporting the Weight: Rollers distribute the weight of the excavator evenly across the tracks, preventing the machine from sinking into soft ground and maintaining stability.

  2. Facilitating Movement: Rollers enable the tracks to move smoothly and efficiently, allowing the excavator to travel over various terrains.

  3. Reducing Friction: By providing a rolling surface for the tracks, rollers minimize friction and wear between the tracks and the undercarriage.

  4. Maintaining Alignment: Rollers help to keep the tracks aligned, preventing them from slipping off the undercarriage during operation.


Common Causes of Roller Damage

Despite their robust design, excavator rollers are susceptible to damage due to several factors:

  1. Wear and Tear: Continuous operation on rough and abrasive surfaces can cause the rollers to wear out over time.

  2. Lack of Lubrication: Insufficient lubrication can lead to increased friction and heat, resulting in premature wear and potential failure.

  3. Contamination: Dirt, debris, and water can infiltrate the rollers, causing corrosion and mechanical failure.

  4. Overloading: Operating the excavator beyond its recommended capacity can put excessive strain on the rollers, leading to cracks and breakage.

  5. Misalignment: Misaligned tracks can cause uneven pressure on the rollers, leading to uneven wear and damage.


Signs of Failing Rollers

Recognizing the signs of failing rollers is crucial for maintaining the efficiency and longevity of your excavator. Here are some common indicators that your rollers may need attention:

  1. Unusual Noises: Squeaking, grinding, or knocking sounds coming from the undercarriage can indicate roller problems.

  2. Visible Wear: Inspect the rollers for signs of excessive wear, such as flat spots, cracks, or uneven surfaces.

  3. Vibration: Increased vibration or a rough ride when operating the excavator can be a sign of roller issues.

  4. Track Misalignment: If the tracks frequently slip or become misaligned, the rollers may be worn or damaged.

  5. Reduced Performance: A noticeable decrease in the excavator’s performance or difficulty in moving smoothly can be attributed to failing rollers.


How to Replace Excavator Rollers

Replacing excavator rollers is a critical maintenance task that can restore the machine’s performance and prevent further damage. Here’s a step-by-step guide on how to replace the rollers with high-quality used OEM parts from Vikfin:

  1. Gather the Necessary Tools and Parts: Before starting, ensure you have all the required tools and replacement parts. Vikfin offers a wide range of used OEM rollers that are thoroughly inspected and refurbished to meet high standards.

  2. Ensure Safety: Safety is paramount when working on heavy machinery. Park the excavator on a level surface, engage the parking brake, and use appropriate supports to lift and stabilize the machine.

  3. Remove the Track: Depending on the type of excavator, you may need to remove the track to access the rollers. This can typically be done by releasing the tension on the track adjuster and carefully removing the track links.

  4. Remove the Old Rollers: Once the track is removed, locate the damaged rollers. Use a suitable wrench or socket to remove the bolts securing the rollers to the track frame. Carefully slide the rollers off the frame.

  5. Inspect and Clean: Before installing the new rollers, inspect the track frame and surrounding components for any damage or wear. Clean the area thoroughly to ensure a smooth installation.

  6. Install the New Rollers: Position the new rollers from Vikfin onto the track frame and secure them with the bolts. Ensure that the rollers are properly aligned and tightened to the manufacturer’s specifications.

  7. Reinstall the Track: Reassemble the track by reconnecting the track links and adjusting the tension to the appropriate level. Ensure that the track is properly aligned and moves smoothly.

  8. Test the Excavator: After replacing the rollers, perform a thorough test of the excavator’s movement and performance. Check for any unusual noises, vibrations, or misalignment.


Benefits of Using Used OEM Parts from Vikfin

Choosing Vikfin for your replacement parts offers several advantages:

  1. Quality Assurance: Vikfin’s used OEM parts are rigorously inspected and refurbished to ensure they meet the highest quality standards.

  2. Cost-Effective: Used OEM parts offer significant cost savings compared to new parts without compromising on performance.

  3. Expertise and Support: Vikfin’s team of experts provides professional advice and support to help you find the right parts for your excavator.

  4. Sustainability: Opting for used parts contributes to environmental sustainability by reducing waste and promoting the reuse of valuable resources.


Conclusion

Excavator rollers play a vital role in the smooth and efficient operation of these powerful machines. Understanding their functions, recognizing the signs of wear, and knowing how to replace them are essential for maintaining your excavator’s performance and longevity. By choosing high-quality used OEM parts from Vikfin, you can ensure reliable and cost-effective solutions for your maintenance needs.



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