John Deere 310SE Throttle Spring Replacement

[MikePhua]

Introduction
The John Deere 310SE backhoe loader is a robust machine widely used in construction and agricultural tasks. A critical component in its operation is the throttle spring, which ensures the accelerator pedal returns to the idle position when released. Over time, this spring can wear out or break, leading to operational issues. Understanding how to replace the throttle spring is essential for maintaining the machine's performance and safety.
Understanding the Throttle Spring
The throttle spring in the 310SE is a coil spring that connects the accelerator pedal to the throttle linkage. Its primary function is to return the pedal to the idle position when not engaged. A malfunctioning spring can cause the pedal to remain depressed or fail to return to idle, affecting engine speed control and potentially leading to unsafe operating conditions.
Symptoms of a Faulty Throttle Spring

• Accelerator pedal remains depressed after release.
  
• Pedal returns slowly or not at all to the idle position.
  
• Unstable engine idle speed.
  
• Difficulty in controlling engine speed, especially at low RPMs.
  

Tools and Materials Needed

• Replacement throttle spring (John Deere part number M75239)
  
• Wrenches and sockets
  
• Screwdrivers
  
• Pliers
  
• Floorboard removal tools
  
• Lubricant (optional)
  

Step-by-Step Replacement Guide

1. Preparation
   • Ensure the backhoe is on a stable surface and the engine is turned off.
     
   • Engage the parking brake for safety.
     
2. Access the Throttle Spring
   • Remove the floorboard to access the throttle linkage. This may involve unscrewing bolts or removing clips.
     
   • Locate the throttle spring attached to the accelerator pedal shaft.
     
3. Remove the Old Throttle Spring
   • Using pliers, carefully detach the old spring from its mounting points.
     
   • Inspect the spring for signs of wear or damage before removal.
     
4. Install the New Throttle Spring
   • Position the new spring in the same orientation as the old one.
     
   • Attach the spring to the accelerator pedal shaft and the throttle linkage.
     
   • Ensure the spring is securely fastened and properly aligned.
     
5. Reassemble the Floorboard
   • Reinstall the floorboard, securing it with screws or clips as necessary.
     
   • Ensure all fasteners are tightened to prevent any movement.
     
6. Test the Throttle Pedal
   • Start the engine and test the accelerator pedal.
     
   • Ensure the pedal returns smoothly to the idle position and that engine speed responds appropriately.
     

Maintenance Tips

• Regularly inspect the throttle spring for signs of wear or corrosion.
  
• Lubricate the throttle linkage periodically to ensure smooth operation.
  
• Replace the throttle spring at the first sign of malfunction to prevent further issues.
  

Conclusion
Replacing the throttle spring on a John Deere 310SE backhoe loader is a straightforward process that can significantly improve the machine's performance and safety. By following the steps outlined above and performing regular maintenance, operators can ensure their equipment remains in optimal condition. Always consult the operator's manual for specific instructions and safety precautions.