Oil seals are designed to create a barrier between the moving parts of a machine and the external environment. They are typically made of rubber or elastomeric materials that are resistant to oil, temperature changes, and wear. The primary function of an oil seal is to retain lubricants within the system and prevent the ingress of contaminants such as dirt, water, and debris.

Typically made from high-quality rubber or synthetic materials, oil seals are designed to withstand various operating conditions, including temperature fluctuations and exposure to chemicals. The choice of material affects the seal's durability and effectiveness. Common materials used for oil seals include nitrile rubber (NBR), fluoroelastomer (FKM), and silicone rubber, each offering unique properties suited for specific applications.

5. Wiper Seals These seals serve a dual purpose of preventing dirt and debris from entering the cylinder while also preventing fluid leakage.

4. Reassemble Once the replacements are made, reassemble the hydraulic cylinder following the instructions provided with your rebuild kit. Ensure all components are securely in place.