John Deere 850C Series 2 Track Issues Troubleshooting and Solutions

[MikePhua]

The John Deere 850C Series 2 Crawler Dozer is a powerful and durable machine commonly used in various construction and earthmoving applications. However, like any heavy machinery, the 850C Series 2 may experience issues with its track system over time, affecting its performance and efficiency. This article covers the common track issues associated with the John Deere 850C Series 2 and offers troubleshooting solutions to help users maintain and repair their machines.
Common Issues and Troubleshooting

1. Track Misalignment
   • Improper Track Tension: Tracks that are either too loose or too tight can cause the machine to misalign. If the track is too loose, it may derail, while excessive tension can lead to increased wear and poor machine performance. Check the track tension and ensure it is within the recommended range. If necessary, adjust the track tensioner.
     
   • Track Wear: Over time, tracks can become worn, leading to misalignment and inefficient operation. Regularly inspect the tracks for wear, especially the track teeth and rollers. If you notice uneven wear or damage, replace the worn parts promptly.
     
2. Track Drive Problems
   • Damaged Drive Sprockets: If the drive sprockets are damaged or worn, the tracks may not function correctly. Inspect the drive sprockets for any cracks or deformation. If damaged, replace the sprockets to restore proper track operation.
     
   • Track Bearing Failures: Worn or dry bearings in the track system can cause rough track movement and potentially lead to track jamming. Inspect the bearings for proper lubrication and signs of wear. Lubricate the bearings as needed, and replace any that are severely worn.
     
3. Hydraulic System Failures
   • Hydraulic Pump Issues: A malfunctioning hydraulic pump can cause the track drive system to malfunction. Check the hydraulic pump for leaks or unusual noises. If the pump is not working efficiently, it may need to be repaired or replaced.
     
   • Hydraulic Fluid Contamination or Low Levels: Contaminated or insufficient hydraulic fluid can affect the performance of the track drive. Regularly check the hydraulic fluid levels and quality. If the fluid is dirty or low, change it and ensure the system is properly topped up with the correct fluid.
     
4. Track Component Damage
   • Damaged Track Plates: Cracked, broken, or excessively worn track plates can severely affect track performance. Inspect the track plates for any signs of damage, such as cracks or holes. If you find damaged plates, replace them promptly to prevent further damage.
     
   • Worn Track Rollers or Idlers: Worn or damaged track rollers and idlers can cause the track to slip or wear unevenly. Inspect the rollers and idlers for wear and replace them when necessary.
     
5. Control System Malfunctions
   • Improper Control Settings: If the control system is improperly calibrated, the tracks may not move smoothly or may fail to engage correctly. Inspect the machine’s hydraulic and electronic control systems to ensure they are set correctly. If the control system is malfunctioning, it may require adjustment or repair.
     
6. Environmental Factors
   • Uneven Ground: Operating the dozer on uneven or soft ground can cause the tracks to slip or become stuck. Always try to work on firm, level ground to avoid unnecessary strain on the machine. If operating on soft ground is unavoidable, take precautions to ensure the machine remains stable and avoid excessive slippage.
     

Solutions and Recommendations

1. Regular Track System Maintenance: Regularly inspect the track system, including the tension, wear levels, and all drive components. Maintaining the track system in good condition will prevent most issues from arising. Adjust the track tension or replace damaged components as needed to keep the system functioning smoothly.
   
2. Timely Replacement of Worn Parts: Components such as track plates, rollers, sprockets, and bearings should be replaced as they wear out. Regularly monitor the condition of these parts to avoid larger, more costly repairs down the line.
   
3. Hydraulic System Maintenance: Ensure the hydraulic fluid is clean and at the correct level. Replace the hydraulic fluid and filters at regular intervals, and check the system for any signs of leaks or damage. Keeping the hydraulic system in optimal condition will prevent many of the track drive issues from occurring.
   
4. Inspect and Adjust the Control System: Regularly check the machine’s control system for proper calibration and function. Ensure that all settings are correct, and if any issues arise, address them promptly by repairing or adjusting the system.
   
5. Choose Stable Operating Surfaces: Whenever possible, choose stable, firm surfaces for operation. If working on soft or uneven ground, take extra precautions to avoid excessive wear and tear on the tracks. Ensure that the machine is operating within its capabilities to avoid damage to the track system.
   

Conclusion
The John Deere 850C Series 2 Crawler Dozer is a reliable and robust machine ideal for heavy-duty tasks. By performing regular maintenance, inspecting critical track components, and promptly addressing any issues, users can keep the machine running smoothly for many years. If problems persist, it is advisable to consult with a professional technician for thorough troubleshooting and repairs. Proper care and maintenance will extend the life of your machine and improve its operational efficiency.