Case 85XT Skid Steer Lift Arms Going Up with Problems: Troubleshooting and Solutions

[MikePhua]

On panswork, a user posted a concern about their Case 85XT skid steer. The issue was that the lift arms were going up on their own, even when they were not being manually operated. This problem is not uncommon in hydraulic systems and can be caused by a variety of factors. In this article, we will explore the potential causes of this issue, troubleshooting steps, and possible solutions.
Understanding the Issue
The user described that the lift arms of their Case 85XT skid steer were lifting on their own, without the operator’s input. This could lead to safety issues, as the machine might not behave as expected during operations. Proper troubleshooting is required to determine the root cause of the issue.
Potential Causes of the Lift Arm Problem

1. Hydraulic Pressure Relief Valve Issues
   

The hydraulic system in a skid steer is designed to control the movement of the lift arms. If the pressure relief valve is malfunctioning, it could lead to erratic movement of the lift arms. This valve is responsible for regulating the pressure within the system, and if it is stuck or not functioning properly, it could cause unintended movements.

1. Faulty Hydraulic Cylinder Seals
   

Another possible cause of the issue is a problem with the hydraulic cylinder seals. Over time, seals can wear out or become damaged. If this happens, hydraulic fluid could leak past the seals, causing the lift arms to rise on their own. This issue could also affect the overall performance of the skid steer, as hydraulic pressure would not be properly maintained.

1. Control Valve Malfunction
   

Skid steers are equipped with control valves that direct the flow of hydraulic fluid to the lift arms. If these valves malfunction, they could cause improper fluid distribution, leading to unintended movements. A malfunctioning control valve might send hydraulic fluid to the lift cylinders even when the operator is not engaging the controls.

1. Hydraulic Hose Leaks or Blockages
   

Leaks in the hydraulic system could cause loss of pressure, while blockages can result in fluid not reaching the right parts of the system. Either issue could cause erratic arm movements, including the lift arms going up unexpectedly. It is important to check for any visible leaks or restrictions in the hoses.

1. Electrical Issues
   

On some models, the lift arms may also be controlled electronically in addition to the hydraulic controls. If there is an electrical malfunction, such as a faulty relay, sensor, or wiring issue, it could send incorrect signals to the hydraulic system, causing the arms to lift without input from the operator.
Troubleshooting the Problem

1. Check for Leaks
   

Inspect the hydraulic lines, cylinders, and hoses for any signs of leaks. Even small leaks can result in abnormal hydraulic system behavior. If any leaks are found, they should be repaired immediately.

1. Test the Pressure Relief Valve
   

Test the pressure relief valve to ensure that it is functioning correctly. This can be done using a pressure gauge to monitor the system’s performance. If the valve is found to be faulty, it will need to be replaced.

1. Inspect the Control Valves
   

Check the control valves for proper operation. Test the joystick or hydraulic controls to ensure that they are responding correctly. If the control valves are not working properly, they may need to be repaired or replaced.

1. Check the Hydraulic Cylinders and Seals
   

Inspect the hydraulic cylinders for any damage or wear on the seals. If the seals are compromised, the cylinders may need to be rebuilt or replaced.

1. Inspect Electrical Components
   

If the machine has electronic controls, check the wiring and sensors related to the lift arm system. Make sure there are no damaged wires or faulty sensors sending incorrect signals.
Possible Solutions

1. Replace or Repair the Pressure Relief Valve
   

If the pressure relief valve is found to be faulty, replacing or repairing it will likely solve the issue of erratic lift arm movement. Be sure to consult the machine’s manual for specifications on the correct valve.

1. Rebuild or Replace Hydraulic Cylinders
   

If the hydraulic cylinders are leaking or showing signs of wear, they may need to be rebuilt or replaced. Rebuilding involves replacing the seals and checking for any damage to the cylinder components.

1. Fix Control Valve Issues
   

If the control valves are malfunctioning, they should be replaced or repaired. Proper calibration of the valves may also be required to ensure they are operating correctly.

1. Fix Electrical Problems
   

If electrical issues are the cause, the faulty wiring or sensor will need to be repaired or replaced. Ensure that all electrical components are properly connected and functioning.
Conclusion
Lift arms going up on their own in a Case 85XT skid steer can be caused by a variety of factors, including issues with the hydraulic pressure relief valve, faulty cylinder seals, malfunctioning control valves, hydraulic hose leaks, or electrical problems. Proper troubleshooting, including checking for leaks, testing the pressure relief valve, inspecting control valves, and evaluating the hydraulic cylinders, is essential for identifying the root cause of the problem. Once the cause is identified, the appropriate repair or replacement of parts will resolve the issue, ensuring the safe and reliable operation of the skid steer.