Maintenance and Lubrication of Excavator Thumb Cylinders

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Introduction to Excavator Thumb Cylinders

Excavator thumb cylinders are an important part of excavator attachments. They are hydraulic cylinders that control the movement and positioning of the thumb attachment. They are used to increase the versatility of the excavator by allowing it to grasp and move objects. Proper maintenance and lubrication of the excavator thumb cylinders is essential to ensure that it operates correctly and lasts for many years.

Hydraulic Cylinder

Steps for Maintenance and Lubrication of Excavator Thumb Cylinders

Step 1: Inspect the Cylinder for Wear and Tear

The first step in maintaining and lubricating excavator thumb cylinders is to inspect them for signs of wear and tear. This includes checking for cracks, dents, abrasions, and other damage. If any of these signs are present, the cylinder should be replaced immediately.

Step 2: Clean the Cylinder

Once any damage has been identified and replaced, the cylinder should be cleaned. This can be done using a degreaser and a brush or cloth to remove any dirt and debris. It is important to make sure that the cylinder is completely dry before lubrication.

Step 3: Apply Grease

The next step in the process is to apply grease to the cylinder. This should be done using a grease gun and should be done in a circular motion to ensure that the grease is evenly distributed. The grease should be applied until it is visible on the surface of the cylinder.

Step 4: Reassemble the Cylinder

Once the grease has been applied, the cylinder should be reassembled. Any seals or gaskets should be replaced and all parts should be securely fastened. The cylinder should then be tested to ensure that it is operating correctly.


Proper maintenance and lubrication of excavator thumb cylinders is essential to ensure that they operate correctly and last for many years. It is important to inspect the cylinder for signs of wear and tear, clean the cylinder, apply grease, and reassemble the cylinder. WLY is an experienced supplier and manufacturer in China. The products mainly include forklift hydraulic cylinders, cylinders, construction cylinders, design capacity of 200,000 sets, and 300 sets of all kinds of fully automatic CNC production equipment and automatic assembly equipment. WLY provides customers with high-quality products, preferential prices and considerate services. In addition, we also supply the following products: Aerial work platform cylinder, Sanitation vehicle cylinder, Telescopic handler boom cylinder, excavator hydraulic cylinder, , Energy Technology Cylinder, Tunnel Boring Machine Cylinder etc. And welcome customers to customize with drawings or samples.

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