How to bleed the air from an excavator platform's hydraulic system?

Bleeding the air from an excavator platform's hydraulic system is a crucial maintenance task that ensures the smooth and efficient operation of the equipment. As a leading supplier of Excavator Platforms, we understand the importance of this process and are here to guide you through it. In this blog, we will provide you with a detailed step-by-step guide on how to bleed the air from an excavator platform's hydraulic system, along with some essential tips and safety precautions.

Lifting Platform Lifting platform YK-200LP

Understanding the Hydraulic System of an Excavator Platform

Before we dive into the bleeding process, it's essential to have a basic understanding of how the hydraulic system of an excavator platform works. The hydraulic system is responsible for powering various functions of the excavator, such as lifting, digging, and moving the platform. It consists of several components, including a hydraulic pump, hydraulic cylinders, valves, and hoses.

The hydraulic pump is the heart of the system, which pressurizes the hydraulic fluid and sends it through the hoses to the cylinders. The cylinders then convert the hydraulic pressure into mechanical force, which is used to move the platform. The valves control the flow and direction of the hydraulic fluid, ensuring that the system operates smoothly and efficiently.

Why Bleeding the Air is Necessary

Air can enter the hydraulic system of an excavator platform during various operations, such as maintenance, repair, or when the system is first filled with hydraulic fluid. Air bubbles in the hydraulic system can cause several problems, including reduced performance, increased wear and tear on the components, and even system failure.

When air is present in the hydraulic system, it compresses more easily than the hydraulic fluid. This can cause the system to become less responsive, as the air bubbles absorb some of the pressure that should be used to move the cylinders. Additionally, air can cause cavitation, which is the formation and collapse of vapor bubbles in the hydraulic fluid. Cavitation can damage the components of the hydraulic system, leading to costly repairs.

Bleeding the air from the hydraulic system removes these air bubbles, ensuring that the system operates at its optimal performance. It also helps to prevent cavitation and other problems, extending the lifespan of the components and reducing the risk of system failure.

Step-by-Step Guide on How to Bleed the Air from an Excavator Platform's Hydraulic System

Step 1: Prepare the Equipment

Before you start bleeding the air from the hydraulic system, you need to prepare the equipment. This includes gathering all the necessary tools, such as a wrench, a bleed screw, and a container to catch the hydraulic fluid. You should also ensure that the excavator platform is parked on a level surface and that the engine is turned off.

Step 2: Locate the Bleed Screws

The next step is to locate the bleed screws on the hydraulic system. The bleed screws are usually located on the hydraulic cylinders or the valves. They are small, threaded screws that allow you to release the air from the system.

Refer to the excavator platform's user manual or consult with a trained technician to determine the exact location of the bleed screws. It's important to note that different models of excavator platforms may have different bleed screw locations, so it's crucial to follow the manufacturer's instructions.

Step 3: Open the Bleed Screws

Once you have located the bleed screws, use a wrench to loosen them slightly. Be careful not to remove the screws completely, as this can cause the hydraulic fluid to leak out. You should only loosen the screws enough to allow the air to escape.

Step 4: Start the Engine

After opening the bleed screws, start the engine of the excavator platform. This will pressurize the hydraulic system and force the air bubbles out through the bleed screws. You may hear a hissing sound as the air escapes from the system.

Step 5: Operate the Hydraulic Functions

While the engine is running, operate the hydraulic functions of the excavator platform, such as lifting, digging, and moving the platform. This will help to circulate the hydraulic fluid and remove any remaining air bubbles from the system.

As you operate the hydraulic functions, you may notice that the air bubbles start to decrease in size and eventually disappear. This indicates that the air is being successfully bled from the system.

Step 6: Close the Bleed Screws

Once you have removed all the air bubbles from the hydraulic system, use a wrench to tighten the bleed screws. Make sure that the screws are tightened securely to prevent any hydraulic fluid from leaking out.

Step 7: Check the Hydraulic Fluid Level

After bleeding the air from the hydraulic system, check the hydraulic fluid level in the reservoir. If the fluid level is low, add the recommended type of hydraulic fluid until it reaches the appropriate level.

Step 8: Test the Hydraulic System

Finally, test the hydraulic system to ensure that it is operating properly. Operate the hydraulic functions of the excavator platform again and check for any signs of air bubbles or reduced performance. If everything is working correctly, you have successfully bled the air from the hydraulic system.

Tips and Safety Precautions

Use the Right Tools: Make sure you use the correct tools for the job, such as a wrench that fits the bleed screws properly. Using the wrong tools can damage the screws or cause the hydraulic fluid to leak.
Follow the Manufacturer's Instructions: Always refer to the excavator platform's user manual for specific instructions on how to bleed the air from the hydraulic system. Different models may have different procedures, so it's important to follow the manufacturer's guidelines.
Wear Protective Gear: When working with the hydraulic system, wear protective gear, such as gloves and safety glasses, to prevent any hydraulic fluid from getting on your skin or in your eyes.
Be Careful with Hot Components: The hydraulic system can get very hot during operation. Be careful when handling the components to avoid burns.
Dispose of Hydraulic Fluid Properly: Hydraulic fluid is a hazardous material and should be disposed of properly. Do not pour the hydraulic fluid down the drain or into the environment. Contact your local waste management facility for instructions on how to dispose of the hydraulic fluid safely.

Conclusion

Bleeding the air from an excavator platform's hydraulic system is a simple but important maintenance task that ensures the smooth and efficient operation of the equipment. By following the steps outlined in this blog and taking the necessary safety precautions, you can easily bleed the air from the hydraulic system and keep your excavator platform in top condition.

If you have any questions or need further assistance with bleeding the air from your excavator platform's hydraulic system, or if you are interested in purchasing a Lifting Platform, Water Intake Platform, or Jack Up Platforms, please feel free to contact us. We are a leading supplier of Excavator Platforms and other related equipment, and our team of experts is always ready to help you.