October 20

How to Remove Water from Hydraulic Oil


If your hydraulic system is not working properly, it may be because there is water in the oil. Water can get into the oil through condensation or from outside sources like rain or snow. Too much water in the oil can cause corrosion and other problems.

You need to remove the water from the oil to keep your system running smoothly.

  • If possible, remove the source of the water contamination
  • This may involve repairing or replacing a leaking component in the system
  • If the source of water contamination cannot be removed, drain the hydraulic oil from the system and replace it with fresh oil
  • Flush the system with a clean solvent to remove any water that may be remaining in the system
  • Replace any filters or other components that may have been damaged by the water contamination
How to Remove Water from Hydraulic Oil

Credit: www.sealingandcontaminationtips.com

How Do I Get Water Out of My Hydraulic Fluid?

If you find that your hydraulic fluid has water in it, there are a few things you can do to get rid of the water and keep your system running smoothly. First, check for leaks. If there are any leaks in your system, they need to be fixed before you do anything else.

Otherwise, the water will just keep coming back. Once you’ve fixed any leaks, you can start flushing the system. This involves draining all of the fluid out and then refilling it with fresh, clean hydraulic fluid.

You’ll need to do this several times to make sure all of the water is gone. You can also try using a dehydration agent to help remove the water from the fluid. These agents work by absorbing the water and keeping it from coming back into contact with the hydraulic fluid.

You’ll need to add these agents regularly until all of the water is gone for good.

Can You Filter Water from Hydraulic Oil?

There are many ways to filter water from hydraulic oil. One way is to use a hydrophobic filter, which will remove water from the oil by creating a barrier between the two liquids. Another way is to use an absorbent material, such as silica gel, to soak up the water from the oil.

Will Water Evaporate Out of Hydraulic Oil?

No, water will not evaporate out of hydraulic oil. Hydraulic oil is a non-polar substance and thus does not have the ability to absorb water molecules. Additionally, the boiling point of water is much lower than that of hydraulic oil, so any water present in the oil would simply boil off long before the oil reached its boiling point.

How Do I Know If There is Water in My Hydraulic Oil?

Most people don’t realize that there are actually several different types of hydraulic oil. The oil that you use in your car is not the same oil that is used in a construction crane. In fact, there are many different grades and weights of hydraulic oil, each designed for a specific purpose.

So how do you know if there is water in your hydraulic oil? The first thing to look for is an emulsion. An emulsion is when water droplets are suspended in the oil.

This can happen when water gets into the system somehow, usually through a leak or bad seal. If you see an emulsion, it’s a good indication that there is water in the system. Another way to tell if there is water in the system is by looking at the color of the oil.

Hydraulic fluid should be a clear, amber color. If it looks cloudy or has a milky appearance, that’s another sign that water has gotten into the system. Finally, you can also check for moisture by using a moisture detector kit.

These kits are designed specifically to test for moisture in hydraulic fluids. They work by passing an electrical current through the fluid; if there is moisture present, it will conduct the current and trigger an alarm on the detector.

Remove water from hydraulic oil

Additive to Remove Water from Hydraulic Oil

If your hydraulic oil has water in it, you can use an additive to remove the water. There are a few different types of additives that can be used, but they all work by attracting the water molecules and binding them to the oil, so they can be removed from the system. One type of additive is a surfactant.

This type of additive works by lowering the surface tension of the oil, which allows the water to more easily mix with the oil and be removed. Another type of additive is an emulsifier. This type of additive works by creating an emulsion between the oil and water, which makes it easier to remove the water from the system.

To use either type of additive, simply add it to your hydraulic oil according to the manufacturer’s instructions. Once you’ve added the additive, run your system for a few minutes to allow it to work its way through the system. Then, check your oil level and top off as needed.


If your hydraulic oil has been contaminated with water, there are a few steps you can take to remove it. First, try draining the oil and replacing it with fresh oil. If that doesn’t work, you can try filtering the oil.

Finally, if neither of those methods works, you may need to replace the entire hydraulic system.


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