How to check Hydraulic Cylinder Internal Leakage

It’s always a good idea to check hydraulic cylinder internal leakage before using the cylinder. This can be done by performing a simple test using shop air. In this article, we’ll show you how to do this test and how to correct any leaks that may be found. Stay safe and productive on the job by following these tips!

A hydraulic cylinder is a device that uses hydraulic fluid to generate linear force and motion. The fluid is typically oil, and it is pressurised by a pump. The cylinder has a piston that is sealed inside, and the fluid is used to push the piston in one direction or the other.

Test the pressure in the system

There are several ways to check for hydraulic cylinder internal leakage. One is to measure the pressure in the system when the system is turned off. If there is a significant drop in pressure, it may be due to an internal leak. 

Another way to check for hydraulic cylinder internal leakage is to visually inspect the cylinders for leaks. If there is an accumulation of hydraulic fluid around the seals or on the outside of the cylinder, it may be due to an internal leak. Finally, if the performance of the system decreases over time, it may also be due to an internal leak.

Pancake hydraulic cylinders are often used to check for internal leakage in larger cylinders. By measuring the pressure required to maintain a given stroke, the total internal leakage can be determined. However, the use of a pancake cylinder is not always necessary, and other methods may be more practical in some cases.

Inspect the hydraulic cylinder for external leakage

To prevent these problems, it is important to regularly inspect the hydraulic cylinder for leaks. Checking for leaks is a simple process that can be done with a visual inspection or by using a leak detector. 

If a leak is found, it is important to take action to repair it immediately. Taking these measures will help to ensure that the hydraulic system operates properly and prevents costly damage.

Check the seals and gaskets for damage or wear

To start, inspect the seals and gaskets for any damage or wear. If these components are not in good condition, they may be allowing fluid to escape from the cylinder. Next, check the fluid level in the reservoir. 

If it is low, that could be a sign of a leak. Finally, look for any signs of external leakage, such as a wet spot on the ground or machine. If you notice any of these issues, it’s important to have the cylinder repaired or replaced as soon as possible to avoid further damage.

Inspect the piston rods and bearings for signs of wear

The most common sign of wear is scoring or pitting on the piston rods and bearings. If this is present, it can cause the seals to leak, resulting in decreased efficiency and decreased output.

Another way to check for leakage is to look for signs of oil or fluid on the outside of the cylinder. If there is an excessive amount of oil or fluid, it could be an indication that there is a problem with the seals. 

Final Thoughts

How do you check hydraulic cylinder internal leakage? The best way to find out if there is a leak in your hydraulic system is to perform a pressure test. By pressurising the system with water and watching for leaks, you can troubleshoot and fix the issue quickly. Have you ever had to deal with this problem on your equipment? What method did you use to find and fix the leak? Let us know in the comments below.