Kubota SVL90 Hydraulic Issue: Troubleshooting and Solutions

[MikePhua]

The Kubota SVL90, a popular compact track loader, is known for its high performance and reliability in various construction and agricultural applications. However, like any piece of heavy machinery, it can experience hydraulic issues over time. When the hydraulic system is not functioning properly, it can significantly affect the loader’s performance, causing sluggish operation, unresponsive controls, or even complete failure of hydraulic functions. This guide provides an overview of common hydraulic issues with the Kubota SVL90 and step-by-step troubleshooting methods to help diagnose and resolve the problem.
Common Symptoms of Hydraulic Issues
Hydraulic issues in the Kubota SVL90 may manifest in several ways, including:

• Slow or unresponsive operation of the loader’s arms or tracks.
  
• Jerky or erratic movement of the loader.
  
• Unusual noises from the hydraulic pump or valves.
  
• Hydraulic fluid leakage.
  
• Low or fluctuating hydraulic pressure.
  

If you notice any of these symptoms, it’s essential to address them promptly to prevent further damage to the hydraulic system.
Possible Causes of Hydraulic Issues
Several factors can contribute to hydraulic problems in the Kubota SVL90. Some of the most common causes include:

1. Low Hydraulic Fluid Levels
   • Insufficient hydraulic fluid can lead to poor hydraulic performance, causing the loader to operate sluggishly or erratically. Low fluid levels can result from leaks, improper maintenance, or excessive use of the hydraulic system.
     
2. Contaminated Hydraulic Fluid
   • Contaminants such as dirt, debris, or moisture in the hydraulic fluid can cause blockages, damage components, and degrade fluid quality. Contaminated fluid can lead to reduced efficiency and potential system failure.
     
3. Hydraulic Pump Malfunction
   • The hydraulic pump is responsible for generating pressure in the hydraulic system. If the pump is damaged or worn out, it can result in low pressure, poor performance, and erratic operation of the loader’s hydraulic components.
     
4. Faulty Hydraulic Valves
   • The hydraulic valves control the flow of fluid to various components. A malfunctioning valve can cause poor movement or a complete loss of function in the loader’s hydraulic system. Common valve issues include blockages, wear, or improper adjustment.
     
5. Leaks in the Hydraulic System
   • Hydraulic fluid leaks can occur at various points in the system, such as hoses, fittings, or seals. Leaks can result in a loss of pressure and fluid, leading to diminished performance and potential damage to the hydraulic system.
     

Step-by-Step Troubleshooting Guide
To identify and resolve hydraulic issues in the Kubota SVL90, follow these troubleshooting steps:

1. Check Hydraulic Fluid Levels
   • Start by checking the hydraulic fluid level. Refer to the operator’s manual for the correct procedure and the appropriate fluid level. If the fluid is low, top it up with the recommended hydraulic fluid.
     
   • If the fluid level is consistently low, check for leaks in the system.
     
2. Inspect Hydraulic Fluid Quality
   • Inspect the hydraulic fluid for contamination. If the fluid appears dirty, milky, or has a burnt odor, it may be contaminated and needs to be replaced.
     
   • Drain the old fluid and replace it with fresh, clean hydraulic fluid that meets Kubota’s specifications.
     
3. Examine the Hydraulic Pump
   • Check the hydraulic pump for any signs of damage or wear. Look for leaks around the pump and listen for unusual noises, such as whining or grinding sounds, which may indicate pump failure.
     
   • If the pump appears to be malfunctioning, it may need to be repaired or replaced.
     
4. Test Hydraulic Pressure
   • Use a hydraulic pressure gauge to test the system’s pressure. Low or fluctuating pressure could indicate a problem with the pump, valves, or other hydraulic components.
     
   • If the pressure is below the recommended level, further inspection of the pump, valves, and lines is necessary.
     
5. Inspect Hydraulic Hoses and Fittings
   • Examine all hydraulic hoses and fittings for leaks, cracks, or signs of wear. Pay close attention to areas where hoses are bent or exposed to friction.
     
   • Replace any damaged hoses or fittings to prevent fluid loss and maintain proper system pressure.
     
6. Check the Hydraulic Valves
   • Inspect the hydraulic valves for blockages, leaks, or wear. Ensure that the valves are correctly adjusted and functioning smoothly.
     
   • If a valve is faulty, it may need to be cleaned, repaired, or replaced.
     
7. Look for Fluid Leaks
   • Check for visible leaks around the hydraulic system, including hoses, cylinders, and fittings. Even a small leak can cause significant performance issues and should be addressed immediately.
     
   • Tighten any loose fittings or replace damaged seals to prevent leaks.
     

Preventative Maintenance Tips
To prevent hydraulic issues in the future and ensure the longevity of your Kubota SVL90’s hydraulic system, follow these maintenance tips:

• Regularly check and maintain the hydraulic fluid levels to ensure they are within the recommended range.
  
• Replace hydraulic fluid and filters as recommended in the operator’s manual.
  
• Inspect hydraulic hoses, fittings, and seals for wear or damage and replace them as needed.
  
• Keep the hydraulic system clean and free of contaminants by using clean fluid and ensuring that the system is properly sealed.
  
• Perform regular pressure tests to monitor the health of the hydraulic system.
  
• Address leaks promptly to avoid further damage and fluid loss.
  

When to Seek Professional Help
While many hydraulic issues can be resolved through troubleshooting and regular maintenance, some problems may require professional expertise. If you encounter any of the following, it may be time to seek help from a certified Kubota technician:

• Persistent hydraulic issues despite regular maintenance and fluid changes.
  
• Hydraulic pump failure or unusual noises from the pump.
  
• Complex hydraulic system problems that require specialized tools or knowledge.
  

Conclusion: Maintaining Optimal Hydraulic Performance on the Kubota SVL90
Hydraulic issues on the Kubota SVL90 can be challenging, but with proper troubleshooting and regular maintenance, most problems can be diagnosed and resolved quickly. By following the steps outlined in this guide and performing routine maintenance, you can keep your machine’s hydraulic system functioning efficiently, ensuring reliable performance and extending the lifespan of your loader. Always follow the manufacturer’s recommendations for fluid, filters, and maintenance intervals to avoid potential hydraulic failures.