Kubota SVL 95-2 Two-Speed Not Working

[MikePhua]

Kubota's SVL 95-2 is a highly capable compact track loader (CTL) that’s designed to excel in both light and heavy construction tasks. Equipped with a two-speed transmission, this machine allows operators to switch between high-speed and low-speed modes, depending on the task at hand. However, when the two-speed function malfunctions, it can significantly affect the machine's productivity and efficiency. Understanding the causes and solutions for this issue is crucial for ensuring your equipment remains operational.
What is the Kubota SVL 95-2 Two-Speed System?
The Kubota SVL 95-2 is a popular machine in the compact track loader market, known for its impressive hydraulic power, versatile attachments, and robust performance. The two-speed system is one of its standout features, enabling the operator to switch between two ranges:

• Low-speed (Creeper) Mode: Ideal for heavy lifting and pushing tasks in confined spaces, this mode provides greater torque and power to the tracks. It is particularly useful for tough terrain and when more traction is required.
  
• High-speed Mode: Designed for faster travel between work sites, this mode allows the machine to move at a faster pace without sacrificing too much power.
  

The transition between these two speeds should be smooth, allowing operators to adapt to the job requirements. However, when this system fails, it can cause significant disruptions to the workflow.
Common Causes for Two-Speed Malfunctions
Several issues can lead to the two-speed system not working correctly in the Kubota SVL 95-2. Below are some of the most common causes:

1. Hydraulic System Issues
   

The two-speed function relies on the hydraulic system to change the pressure and control the speed of the tracks. If there’s a problem with the hydraulic system, such as low fluid levels, contamination, or a malfunctioning pump, it can prevent the system from shifting between speeds. This is one of the most common causes of a malfunctioning two-speed system in many compact track loaders, including the Kubota SVL 95-2.

• Solution: Regularly check hydraulic fluid levels and replace the hydraulic fluid as needed. If contamination is suspected, flushing the system and replacing the filters may be necessary.
  

1. Damaged or Worn Out Speed Control Solenoid
   

The solenoid is responsible for controlling the flow of hydraulic fluid to the two-speed transmission. Over time, the solenoid can wear out or become damaged, causing the system to malfunction. If the solenoid fails, the loader may not shift into the desired speed, or the change may be delayed.

• Solution: Inspect the solenoid for any signs of wear or damage. If faulty, it should be replaced. Regular inspections can prevent the failure of such components.
  

1. Electrical or Sensor Problems
   

The two-speed system in modern loaders like the Kubota SVL 95-2 often involves sensors and electrical connections to monitor and control the speed. If there’s an issue with the wiring, sensor, or ECU (electronic control unit), the loader may not be able to switch between the two-speed ranges.

• Solution: A diagnostic scan can help identify electrical or sensor-related issues. If faulty wiring or sensors are detected, they should be repaired or replaced.
  

1. Transmission Problems
   

Like any vehicle, the transmission of a compact track loader can suffer from wear and tear. Issues with the transmission’s internal components, such as a broken gear or worn clutch, can lead to the two-speed malfunctioning. A transmission failure may cause the loader to be stuck in one speed, or it may not shift properly.

• Solution: Regular transmission fluid checks and servicing can prevent issues. If a gear failure is suspected, a professional repair may be required, which can be costly but necessary to restore functionality.
  

1. Throttle Linkage Issues
   

The throttle linkage directly impacts how the machine responds to speed changes. A malfunctioning or disconnected throttle linkage can cause the two-speed system to fail, especially when transitioning between low and high speed.

• Solution: Inspect the throttle linkage for proper function and ensure all connections are intact. Reconnect or replace the linkage if necessary.
  

1. Clogged or Worn Filters
   

Hydraulic and transmission filters are essential for maintaining proper fluid flow throughout the system. If these filters become clogged, they can restrict the flow of hydraulic fluid, leading to slow or erratic performance of the two-speed system.

• Solution: Regularly clean or replace filters according to the manufacturer's maintenance schedule. This simple task can prevent costly repairs down the line.
  

Diagnosing the Issue
When faced with a malfunctioning two-speed system, a thorough diagnosis is key. Begin by checking for any obvious signs of wear or damage, such as leaks, strange noises, or irregular behavior when switching speeds. Here’s a step-by-step guide for diagnosing the problem:

1. Check Fluid Levels: Ensure that the hydraulic fluid and transmission fluid are at the proper levels. Low fluid can result in poor performance or failure of the two-speed system.
   
2. Test the Solenoid: If the solenoid appears to be damaged, you can test its functionality by removing it and performing a continuity test or replacing it with a known good one.
   
3. Run a Diagnostic Scan: If the issue appears to be electrical, use a diagnostic tool to scan for error codes or communication failures between components.
   
4. Inspect the Transmission: Check for any visible damage to the transmission components. If necessary, take the loader to a certified repair shop for further inspection.
   

Preventative Maintenance Tips
The best way to avoid issues with the Kubota SVL 95-2's two-speed system is through regular maintenance. Here are some tips to ensure the longevity and performance of your machine:

• Regular Fluid Checks: Always check and maintain proper fluid levels for hydraulic and transmission systems.
  
• Scheduled Replacements: Replace filters, seals, and hydraulic hoses according to the manufacturer’s recommendations.
  
• Clean the Cooling System: Ensure the cooling system is working properly to avoid overheating, which can cause the two-speed system to underperform.
  
• Inspections After Heavy Use: After using the loader for a particularly heavy job or working in extreme conditions, perform a thorough inspection of the two-speed system to catch any potential issues early.
  

Conclusion
A malfunctioning two-speed system in the Kubota SVL 95-2 can be a frustrating issue, but understanding the potential causes and solutions can help resolve the problem quickly. By conducting regular maintenance and addressing issues like hydraulic fluid levels, solenoid damage, and sensor malfunctions, you can extend the life of your equipment and avoid unnecessary downtime. In case the issue persists despite troubleshooting, don’t hesitate to consult a professional technician or Kubota dealer for expert assistance.