BCU 523749.31 – INFORMATION FOR OPERATOR: Rear PTO Not Operating. Switch Rear PTO Off and On Again. John Deere System Advisory.

BCU 523749.31 (BCU )

Code: 523749.31



Error code BCU 523749.31 is issued as an operator information message indicating that the rear Power Take-Off (PTO) is not operating correctly, specifically that the PTO speed is not proportional to the engine speed. This discrepancy may result from a variety of issues, including sensor malfunctions, mechanical hindrances, or software glitches within the PTO control system. The advisory suggests a simple initial troubleshooting step of turning the PTO off and then on again to reset the system.


The PTO may not engage or may operate inefficiently, which can impact the performance of implements attached to the PTO. This condition can lead to reduced effectiveness in tasks that are dependent on the PTO, such as mowing, grinding, or other operations.


  • Restart the Rear PTO: Follow the instructions to switch the rear PTO off and then on again to see if this resets the system and resolves the issue.
  • Inspect PTO Linkages and Connections: Check for any mechanical obstructions or loose connections that might be affecting the PTO’s operation. Ensure that all mechanical components are in good working order and that electrical connectors are secure and undamaged.
  • Check PTO Speed Sensors: Verify the functionality of sensors monitoring the PTO speed. Look for signs of damage or malfunction and test their outputs to ensure they are operating within specified parameters.
  • Diagnose with Diagnostic Tools: Use diagnostic software tools to read more in-depth system errors or logs that might indicate the specific nature of the problem. This can help pinpoint issues that are not immediately apparent.
  • Consult the Vehicle’s Manual: Refer to the tractor’s manual for specific troubleshooting steps related to PTO issues. This may include calibration steps or specific settings adjustments.
  • Service by a Professional: If the issue persists, consider having the tractor serviced by a professional technician who can conduct a comprehensive diagnosis and undertake necessary repairs.
  • Regular Maintenance Checks: Incorporate regular checks of the PTO system into your maintenance schedule to prevent similar issues in the future. Regular maintenance can help ensure all components function correctly and reduce downtime.


Ensuring the rear PTO operates correctly is crucial for the performance of a wide range of agricultural tasks. Operator alerts like BCU 523749.31 serve as timely reminders to address potential issues before they lead to more significant problems. Following up on such advisories with thorough checks and maintenance can significantly enhance the reliability and functionality of farm machinery.