John Deere JD 319D Auxiliary Hydraulic System Fault Codes and Troubleshooting Guide

[MikePhua]

The John Deere JD 319D compact track loader is a popular and highly versatile machine used in construction, agriculture, and landscaping. The auxiliary hydraulic system plays a crucial role in powering attachments, but users may encounter fault codes that hinder the machine’s performance. This article provides a guide to common auxiliary hydraulic system fault codes on the JD 319D and offers solutions to help diagnose and fix the issues.
Common Fault Codes

1. Code 517160.09 - Hydraulic Flow Insufficient
   This fault code indicates that the hydraulic system is not providing enough flow, which could be due to low hydraulic oil levels, poor oil quality, or a malfunctioning hydraulic pump. Insufficient flow will affect the performance of hydraulic attachments, such as buckets or augers.
   
2. Code 517160.05 - Hydraulic Pressure Low
   This code usually appears when the hydraulic pressure is too low, which may be caused by a failing pump, blocked oil lines, or hydraulic leaks. Low pressure can prevent the machine from operating attachments or performing tasks effectively.
   
3. Code 517160.08 - Hydraulic Temperature High
   A high hydraulic temperature can lead to decreased system efficiency and potential damage. Common causes include cooling system issues, clogged radiators, or degraded hydraulic oil.
   
4. Code 517160.07 - Hydraulic Flow Unstable
   When this code appears, it suggests that the hydraulic flow is unstable, which may be caused by a faulty hydraulic pump, damaged hoses, or a clogged filter. Unstable flow can lead to jerky or inconsistent operation of the machine’s hydraulic functions.
   
5. Code 517160.06 - Oil Pressure Sensor Fault
   A malfunctioning oil pressure sensor can cause inaccurate pressure readings, resulting in improper operation of the hydraulic system. This issue could be caused by an electrical fault, loose connections, or a worn-out sensor.
   

Solutions

1. Hydraulic Flow Insufficient (Code 517160.09)
   • Check the hydraulic oil levels and ensure the oil is clean and of the correct type. Refill or replace the oil if necessary.
     
   • Inspect the hydraulic pump for proper operation. Replace the pump if it is malfunctioning.
     
   • Replace the hydraulic filter if it is clogged or damaged.
     
2. Hydraulic Pressure Low (Code 517160.05)
   • Inspect the hydraulic oil lines for any leaks and repair or replace damaged hoses.
     
   • Check the hydraulic pump and pressure regulating valve for proper functioning.
     
   • If the pressure remains low, inspect the hydraulic filter for blockages and replace it if needed.
     
3. Hydraulic Temperature High (Code 517160.08)
   • Clean the radiator and ensure there is no blockage, which could reduce airflow.
     
   • Check the cooling system for issues such as low coolant or malfunctioning coolant pumps.
     
   • Use the correct type of hydraulic oil and change it if necessary.
     
4. Hydraulic Flow Unstable (Code 517160.07)
   • Inspect the hydraulic pump and ensure it is operating smoothly.
     
   • Clean the hydraulic filter and check for clogs.
     
   • Ensure that all hydraulic hoses are intact and free from leaks or damage.
     
5. Oil Pressure Sensor Fault (Code 517160.06)
   • Check the electrical connections to the pressure sensor for any loose or corroded contacts.
     
   • Replace the faulty sensor if necessary.
     
   • Use diagnostic tools to test the sensor and recalibrate if needed.
     

Conclusion
The JD 319D is a robust machine, but like all heavy equipment, it may face issues with its auxiliary hydraulic system over time. Regular maintenance, such as checking hydraulic oil levels, ensuring proper function of the hydraulic pump, and cleaning or replacing filters, will help prevent many common problems. If issues persist, it is recommended to consult with a professional technician who can properly diagnose and repair the machine to keep it running at optimal performance.