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Hebei Hankai 22 40 7 oil seal
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3. Disassemble the cylinder Once the boom cylinder is removed, it needs to be disassembled to access the old seals. This involves removing the end caps, piston, and other internal components to reach the seals that need to be replaced This involves removing the end caps, piston, and other internal components to reach the seals that need to be replaced
This involves removing the end caps, piston, and other internal components to reach the seals that need to be replaced This involves removing the end caps, piston, and other internal components to reach the seals that need to be replaced
excavator boom cylinder seal replacement.


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The primary seal, often made of polyurethane, rubber, or PTFE (Teflon), prevents fluid from leaking past the piston. The secondary seal, typically an O-ring, provides additional security against fluid bypass. Wear rings, usually made of hard materials like bronze or steel, reduce friction and prevent scoring of the cylinder wall. Scraper seals help remove any contamination or debris that may have entered the system Scraper seals help remove any contamination or debris that may have entered the system
Scraper seals help remove any contamination or debris that may have entered the system Scraper seals help remove any contamination or debris that may have entered the system
hydraulic piston seal kit.


Oil seals come in various designs depending on the specific requirements of the machinery. The 20x30x7 oil seal, for example, is a standard radial shaft seal that is installed along the shaft to prevent oil from leaking out or contaminants from entering the machinery. This type of seal is commonly used in engines, gearboxes, and other rotating equipment where the sealing of fluids is essential.