Maintenance of a hydraulic cylinder. The process involves several steps: 1. *Disassembly:* The hydraulic cylinder is disassembled. This includes removing the piston rod and separating the cylinder body from the end caps. The old seals are removed, and the cylinder is cleaned. 2. *Seal Replacement:* New seals are installed into the cylinder body. The specific type of seal used depends on the cylinder’s application and design. The video shows seals with a yellow and black color scheme. 3. *Reassem