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How to Check for Internal Leaks in Hydraulic Cylinders

hydraulic cylinders are widely used for a variety of industrial applications and have become an essential component in the operation of machinery. They are used to provide power for machines, from simple tasks like raising and lowering a platform to more complex tasks like controlling the speed of a conveyor belt. In order to ensure optimal performance, it is important to regularly check for any internal leaks in hydraulic cylinders. Here are some tips on how to check for internal leaks in hydraulic cylinders.

What is a Hydraulic Cylinder?

Hydraulic cylinders are devices that convert fluid pressure into mechanical force and motion. They are typically used in industrial and construction applications as a way to generate linear, or straight line, force. They often consist of a piston and cylinder, with the piston being pushed or pulled by the fluid pressure generated by the cylinder.

How to Check for Internal Leaks in Hydraulic Cylinders

1. Inspect the Outer Seals

The first step in checking for internal leaks in hydraulic cylinders is to inspect the outer seals. Look for any signs of damage or wear, such as cracks, tears, or other signs of wear. If the seals appear to be in good condition, then proceed to the next step.

2. Use a Pressure Gauge

The next step is to use a pressure gauge to check the system pressure. This can be done by attaching the pressure gauge to the cylinder and then cycling the cylinder through its full range of motion. If the pressure reading drops below the recommended level, then it is likely that there is an internal leak.

3. Use a Leak Detector

If the pressure gauge does not reveal any problems, then it is a good idea to use a leak detector to further investigate. Leak detectors are specialized tools that use ultrasonic or infrared technology to detect the presence of any leaks in the system. These devices can be used to pinpoint the exact location of any leaks, allowing for a more targeted repair.

4. Clean and Repair

Once the leak has been located, the next step is to clean and repair the affected area. This will involve removing any debris or dirt that may have accumulated around the leak, as well as using a sealant to close the leak. It is important to use a high-quality sealant that is designed to withstand the high pressures generated by hydraulic cylinders. Once the repair is complete, the system should be tested to ensure that the leak has been successfully sealed.


Checking for internal leaks in hydraulic cylinders is an important part of maintaining the performance of the system. By using a pressure gauge, leak detector, and quality sealant, it is possible to quickly and accurately identify any leaks and take the necessary steps to repair them. With regular inspections and proper maintenance, it is possible to ensure that your hydraulic cylinders are performing at their best.

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EVER-POWER Hydraulic Cylinders

EVER-POWER is a leading position in the market segment of hydraulic cylinders for mobile machinery in China. The products mainly include hydraulic tilt cylinders, hydraulic steering cylinders, and hydraulic lift cylinders. The design capacity is 200,000 sets, and there are various types of fully automatic CNC production 300 sets of equipment, and automatic hydraulic cylinder assembly equipment.

Advantages of EVER-POWER Hydraulic Cylinders

  • High quality materials and components
  • High precision machining
  • Robust design and construction
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  • Easy installation and maintenance

How to Choose the Right Hydraulic Oil and Oil Seal

  • Choose the right hydraulic oil based on the operating environment and application.
  • Choose the right oil seal based on the operating temperature, fluid compatibility, and pressure.
  • Check the seals for any signs of wear or damage.
  • Replace the seals if necessary.

How to Choose a Suitable Power Unit

  • Choose a power unit that is compatible with your application and environment.
  • Ensure that the power unit has the necessary flow rate, pressure, and capacity for your application.
  • Check the power unit for any signs of wear or damage.
  • Ensure that the power unit has the necessary safety features and certifications.

EVER-POWER Products and Services

At EVER-POWER, we pride ourselves on providing high-quality products and services at competitive prices. We also offer a wide range of hydraulic cylinders, such as aerial work platform cylinders, industrial vehicle hydraulic cylinders, rotary drilling cylinders, mobile crane cylinders, construction machinery hydraulic cylinders, forklift hydraulic cylinders, mining dump truck cylinders, and sanitation machinery hydraulic cylinders. In addition, we also offer customization services with drawings or samples.

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EVER-POWER provides high-quality products, preferential prices, and considerate services. We use advanced production equipment and strict quality control procedures to ensure that our products meet the highest standards. Our experienced team of engineers and technicians are always available to provide technical support and guidance. We are committed to providing our customers with the best products and services possible.

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