Hydraulic System Stopped? Troubleshooting Hydraulic Systems

Even with all the advances in hydraulic system parts and components, there are still several things that can and do go wrong unexpectedly, even with proper maintenance. When everything stops working, you can use these troubleshooting tips for hydraulic systems to see if one or more will help get it  back up and running.

Questions to Ask When Troubleshooting a Stopped Hydraulic System

#1: Is the system on?

This might seem like an oversight, but on some machines and equipment the hydraulic system can be turned on and off remotely. Always check that the system is indeed powered on. This includes ensuring that any external switches, remote controls, or power sources are correctly engaged. Accidental deactivation is all too often the cause of a non-operating system.

#2: Are the pump and motor running?

If the pump and motor are not running, then fluid will not be moving through the system. Check the electrical connections, fuses, and relays that control the motor and pump. Listen for the sound of the motor running and observe if the pump is vibrating slightly as it operates, which indicates activity. Absence of these signs could point towards an electrical issue or a mechanical failure within the motor or pump.

#3: Are there any hydraulic fluid leaks?

Leaks are a common issue in hydraulic systems and can prevent the system from building up necessary pressure. Inspect hoses, connections, and fittings for any signs of hydraulic fluid on the ground or along the path of the hydraulic lines. Small leaks can sometimes be detected by the presence of a hissing sound where the fluid is escaping under high pressure.

#4: Is there fluid in the fluid reservoir?

Operating the hydraulic system without adequate fluid can cause severe damage. Always check the fluid level in the reservoir before startup. Low fluid levels can lead to cavitation and excessive heat, which impair system operations.

#5: Is the filter clogged?

A clogged filter can significantly reduce the flow rate of hydraulic fluid, leading to a system halt. Check the filter for any debris that might be obstructing the flow. Replacing or cleaning the filter can restore normal flow and operation. Regular maintenance and timely replacement of filters are vital in troubleshooting hydraulic systems.

#6: Is there air in the hydraulic system?

Air in the hydraulic fluid can cause the system to sputter and perform inefficiently. Look in the fluid reservoir for signs of bubbling or foaming. If present, bleed the system to remove this air and ensure all connections are air-tight. Identifying how and where air is entering the system is important for effective long-term maintenance.

#7: Are you using the right fluid?

Using the incorrect type of hydraulic fluid can lead to a number of issues, including poor lubrication, increased wear, and incorrect system pressure. Always check the hydraulic fluid type against the system specifications. Incorrect fluids can harm the hydraulic system's performance and even lead to total failure.

#8: Is the pump or motor making strange noises or is it louder than normal?

Unusual noises from the pump or motor can be indicative of internal issues such as misalignment, wear, or mechanical failure. Noise can also suggest internal leakage within the hydraulic components, leading to a drop in system pressure and inefficient operation. Inspect the pump and motor for any signs of damage or wear and consult system schematics or a professional if necessary.

#9: Are the hydraulic hoses in good condition?

Check the hydraulic hoses for any signs of wear, tear, or degradation. Cracks or kinks can compromise the system by causing leaks or blockages that can reduce pressure and fluid flow. Replacing damaged hoses is essential to prevent failures and maintain system integrity.

#10: Is the relief valve properly adjusted?

Ensure that the relief valve is set to the correct specifications for your system. A relief valve that is misadjusted can lead to pressure levels that are either too high or too low, affecting actuator speed and overall system performance. If the valve is malfunctioning, try cleaning or adjusting it to restore proper function. In some cases, it’s best to replace it with a new one.

Contact White House Products for High-Quality Hydraulic Supplies

We hope that these troubleshooting tips for hydraulic systems can help resolve minor issues. By working through this checklist, you should be able to identify the root cause of the problem and apply the correct solution to restore functionality. This kind of systematic approach to troubleshooting hydraulics tends to be the most effective for the longevity of hydraulic equipment.

When you need hydraulic motors, pumps, and other hydraulic system components, please feel free to browse our extensive online catalogue or contact White House Products Ltd. on +44 (0) 1475 742500 or e-mail: sales@whp.co.uk today!