Case 850 Transmission Issues: Troubleshooting and Solutions

[MikePhua]

Introduction
The Case 850 crawler loader has encountered various transmission-related issues, with users facing difficulties in troubleshooting and resolving the problems. The symptoms observed range from slipping gears to a complete lack of movement. This article provides a summary of the issues, possible causes, and suggested solutions based on user experiences.
Transmission Slipping
One of the primary issues users have reported with the Case 850 is transmission slipping. When the machine is under load, users noticed that it would lose power or even stop moving altogether. Some users suspect that this could be a problem with the transmission pump, the fluid levels, or even the hydraulic system.
Possible Causes of Slipping

• Low Fluid Levels: One of the most common causes of slipping gears in the Case 850 is low transmission fluid. Ensuring the fluid is at the correct level is crucial, as insufficient fluid can lead to loss of hydraulic pressure and slipping.
  
• Dirty or Contaminated Fluid: Another possible issue is that the transmission fluid might be contaminated or degraded. This can lead to poor performance and, in some cases, damage to internal components.
  
• Faulty Transmission Pump: A failing or worn-out transmission pump can also cause slipping, as it won’t be able to maintain the necessary pressure for proper operation.
  

Shifting Issues
Some users have encountered difficulties with shifting gears in the Case 850, particularly when transitioning between forward and reverse. This could be due to problems with the transmission linkage or the control valve.

• Transmission Linkage: If the linkage is out of adjustment or worn out, it can lead to poor gear engagement, causing issues when shifting.
  
• Control Valve: The control valve plays a significant role in gear shifting. If the valve is malfunctioning, it may prevent the transmission from properly engaging the desired gear.
  

Hydraulic System Problems
The Case 850’s transmission system is closely tied to the hydraulic system, and issues with hydraulics can affect transmission performance.

• Hydraulic Pressure: Low hydraulic pressure can result in poor transmission performance, as the hydraulic system helps engage the gears. If the hydraulic pump is not functioning correctly, it can lead to slipping or failure to move.
  
• Leaking Seals or Hoses: Leaks in the hydraulic system can lead to a drop in pressure, which in turn affects the transmission. Inspecting seals and hoses for leaks is an essential part of troubleshooting.
  

Recommended Solutions
To address transmission issues with the Case 850, users have shared several recommendations:

• Check Fluid Levels and Quality: Always ensure that the transmission fluid is at the correct level and in good condition. If the fluid is dirty or contaminated, consider flushing and replacing it.
  
• Inspect the Transmission Pump: Check the pump for any signs of wear or malfunction. If needed, replace the pump to restore proper function.
  
• Adjust or Replace Transmission Linkage: Inspect the transmission linkage for wear or misalignment. If adjustments don't resolve the issue, consider replacing the parts.
  
• Test Hydraulic Pressure: Check the hydraulic system for proper pressure and look for any leaks in the hoses or seals. Fixing leaks or replacing damaged components will improve transmission performance.
  

Conclusion
Transmission issues with the Case 850 crawler loader can stem from various sources, including low or contaminated fluid, a failing transmission pump, or problems with the hydraulic system. By systematically checking each component and performing the recommended maintenance steps, owners can resolve these issues and improve the performance and lifespan of their equipment.