Installing a Hydraulic Priority Valve for Tile Plow on a Case 850C II

[MikePhua]

The Case 850C II, a track loader often used for tasks requiring both power and precision, has been a valuable machine in a variety of industries. Its powerful hydraulic system allows operators to perform heavy-duty tasks, but sometimes modifications are necessary to optimize performance, especially when adding attachments like tile plows. One modification that can significantly improve the functionality of the Case 850C II in such cases is installing a hydraulic priority valve.
What is a Hydraulic Priority Valve?
A hydraulic priority valve is a device that controls the flow of hydraulic fluid in a system, directing it where it’s most needed first. When installing a tile plow, which requires consistent hydraulic power for its operation, a hydraulic priority valve ensures that the hydraulic flow to the plow is maintained while still allowing for the normal operation of other functions on the machine.
The main purpose of the hydraulic priority valve is to prioritize flow to critical components, such as the tile plow, without sacrificing performance of other hydraulic functions. This makes the loader more versatile and ensures efficient operation during tile plowing or other auxiliary tasks.
Why Do You Need a Hydraulic Priority Valve for a Tile Plow?
Tile plows are used for installing underground drainage systems, a crucial part of land management in farming, construction, and other industries. These plows require steady hydraulic power to maintain consistent operation. Without a priority valve, the hydraulic system may divert fluid to other less critical functions, potentially causing the tile plow to perform poorly.
The tile plow typically requires the full flow of the hydraulic system to operate at optimal efficiency. Without a hydraulic priority valve, there may be fluctuations in power that could affect the plow’s effectiveness, especially during the demanding conditions of trenching and laying tile. A hydraulic priority valve, by ensuring that the flow of hydraulic fluid goes to the tile plow first, guarantees consistent performance, reducing downtime and improving overall efficiency.
Steps to Install a Hydraulic Priority Valve on a Case 850C II
Installing a hydraulic priority valve involves a few key steps, ensuring that the valve is positioned correctly and connected properly within the hydraulic circuit of the 850C II. Here’s a general guide to help in the installation process:

1. Understand the Hydraulic Circuit
   Before making any modifications, it is essential to understand the hydraulic layout of the Case 850C II. The machine’s hydraulic system consists of pumps, lines, valves, and cylinders that distribute hydraulic fluid to various functions. The priority valve must be installed in a location where it can effectively control the flow to the tile plow while ensuring the rest of the machine’s functions are not compromised.
   
2. Select the Correct Hydraulic Priority Valve
   Choose a hydraulic priority valve that matches the flow rate requirements of the tile plow and the hydraulic capacity of the 850C II. Ensure that the valve is rated for the system pressure and that it provides the appropriate flow to meet the demands of the plow without affecting the performance of other attachments.
   
3. Shut Down the Machine
   Always ensure that the machine is turned off and the hydraulic pressure is relieved before beginning the installation process. This is critical to avoid accidents and injuries during the modification process.
   
4. Locate the Hydraulic Lines
   Identify the hydraulic lines that supply fluid to the tile plow. In most cases, the return line or the pressure line will be involved in the installation of the priority valve. Understanding the existing hydraulic layout is crucial before proceeding with the installation.
   
5. Install the Hydraulic Priority Valve
   • Mount the Valve: Find an appropriate location to mount the hydraulic priority valve. This location should be easily accessible for future maintenance and adjustments. The valve should be installed inline with the hydraulic system, typically between the pump and the plow.
     
   • Connect the Lines: Connect the hydraulic lines to the priority valve as per the manufacturer’s instructions. The hydraulic lines need to be tightly fitted to avoid leaks. The priority valve will direct the hydraulic fluid flow to the tile plow first before other functions.
     
   • Check the Flow Settings: Adjust the priority valve to ensure that the proper amount of hydraulic fluid is directed to the plow, and the other attachments are still receiving adequate flow.
     
6. Test the System
   Once the priority valve is installed, turn on the machine and test the system. Engage the tile plow and other hydraulic functions to ensure that the plow is operating efficiently without causing a drop in performance elsewhere. Check for leaks and verify that the priority valve is functioning as intended.
   
7. Fine-Tuning
   After testing, fine-tune the valve settings to adjust the flow and ensure that the tile plow operates at optimal efficiency. This may require slight adjustments over time as the hydraulic fluid ages and the system experiences wear and tear.
   

Potential Issues and Troubleshooting
While installing a hydraulic priority valve can significantly improve the functionality of the Case 850C II with a tile plow, there are a few issues that may arise:

1. Flow Imbalance:
   If the priority valve is not set up correctly, it can lead to an imbalance in hydraulic flow. The tile plow may not receive enough power, or other functions may be deprived of the necessary hydraulic fluid. Always monitor the system after installation to ensure a balance between the plow and other attachments.
   
2. Leaks:
   Hydraulic systems are highly pressurized, and any leaks in the system can cause a significant loss in performance. Ensure that all connections are secure, and fittings are properly sealed. Regularly check the system for leaks after the installation.
   
3. System Overheating:
   If the priority valve restricts the flow too much, it can lead to overheating of the hydraulic fluid, causing the machine to overheat and potentially damage the system. This can be prevented by ensuring the valve is installed correctly and adjusted properly.
   

Benefits of Installing a Hydraulic Priority Valve

1. Improved Efficiency:
   By prioritizing the flow to the tile plow, the machine can maintain constant, optimal performance while still allowing other functions to operate. This reduces downtime and increases productivity on the job site.
   
2. Increased Longevity of Components:
   With a steady supply of hydraulic fluid to critical components like the tile plow, wear and tear are reduced, leading to longer-lasting machinery and fewer repair needs.
   
3. Enhanced Versatility:
   Installing a hydraulic priority valve gives the Case 850C II the ability to efficiently manage multiple tasks, making it a more versatile machine for a wider range of applications.
   

Conclusion
The installation of a hydraulic priority valve on the Case 850C II track loader, especially when using attachments like tile plows, is an essential modification that ensures optimal hydraulic performance. The priority valve directs the necessary fluid to the plow, ensuring it operates without any interference from other machine functions. By understanding the hydraulic system, selecting the right components, and following the correct installation procedures, operators can increase the efficiency and longevity of their machines, improving productivity and reducing maintenance costs. Regular checks and maintenance of the valve and hydraulic components will ensure continued performance, making the machine a reliable asset for various tasks in construction, agriculture, and other industries.