How to Free Stuck Kubota Mini Excavator Track Rollers

[MikePhua]

When using a Kubota mini excavator, the track system's smooth operation is essential for overall machine performance. If the track rollers get stuck, it can affect the excavator’s efficiency and may lead to further mechanical issues. This article provides a guide on how to address stuck track rollers and get your machine running smoothly again.
1. Identifying the Issue
The most common cause of stuck track rollers is the accumulation of dirt, debris, or other materials, or mechanical failure. The friction and load on the tracks can lead to excessive wear on the rollers, which affects their rotation. A stuck track roller can prevent the excavator from moving properly or turning efficiently.
2. Inspect the Track Roller
Start by inspecting the stuck track roller to determine the severity and cause of the issue.

• Observe the Roller Movement: Try rotating the stuck track roller manually. If it’s difficult to rotate, it may be due to dirt buildup or worn bearings.
  
• Check for Damage: Look for any visible damage or excessive wear on the roller or its bearings. If the wear is severe, the roller or its components may need to be replaced.
  

3. Clean the Track Roller
If the problem is caused by dirt or debris buildup, cleaning is the most straightforward solution.

• Remove Dirt and Debris: Use a shovel, steel brush, or high-pressure washer to clean the track roller and the area around it. Pay close attention to the inside and crevices of the roller.
  
• Check Lubrication: After cleaning, ensure that the roller’s lubrication system is functioning properly. Lack of lubrication could lead to increased wear and affect roller movement.
  

4. Lubricate and Inspect Bearings
After cleaning, check the condition of the bearings and lubrication. If the bearings are dry or damaged, the roller will not rotate smoothly.

• Add Lubricant: Use the appropriate grease or oil to lubricate the bearings. Ensuring proper lubrication will help extend the roller’s lifespan and improve performance.
  
• Check Lubrication System: If the lubrication oil is insufficient or of poor quality, consider replacing the lubricant.
  

5. Address Bearing Damage
If the track roller’s bearings are damaged, they must be replaced. Continuing to use damaged bearings could lead to further mechanical failure.

• Replace the Bearings: Remove the stuck track roller and inspect the bearings. If they are worn or broken, replace them with new ones.
  
• Clean the Bearings: Before installing new bearings, ensure that the roller and bearing housing are thoroughly cleaned.
  

6. Check the Track Tensioning System
Incorrect track tension could also cause the roller to get stuck. If the track is too tight, it can put excessive load on the rollers, causing them to seize up.

• Adjust Track Tension: Check the track tensioning system to ensure that the track is not too tight. Adjust the track tension to allow the rollers to move freely without excessive pressure.
  
• Inspect the Tensioning Mechanism: Check the tensioning system for any faults or damage. If the system is malfunctioning, it may need to be repaired or replaced.
  

7. Other Potential Causes
In some cases, the roller may be stuck due to other mechanical failures or damaged parts. For instance, the track chain or wheel group could also be at fault.

• Inspect the Track Chain and Wheel Group: If cleaning and lubrication do not solve the issue, check the track chain or wheel group for any abnormalities, such as wear, breakage, or deformation.
  
• Check the Hydraulic System: A malfunction in the hydraulic system could restrict the movement of the tracks, affecting the rollers. Ensure that the hydraulic system is functioning properly.
  

8. Conclusion
To resolve the issue of stuck Kubota mini excavator track rollers, it is important to identify the root cause and address it through proper cleaning, lubrication, and inspection. If the problem is caused by bearing damage or improper track tension, replacing parts and adjusting the track tension is essential.
Regular maintenance and checks can help prevent similar issues and keep your machine running efficiently. If the problem persists or you are unable to fix it yourself, consider contacting a professional technician for further diagnosis and repair.