When installing the skeleton oil seal, how should I install it when there is no special installation tool?
To prevent oil seal lip 121 from being stretched or damaged by scratches, special installation tools must be used when installing frame oil seals. If this tool is not available, it can be installed by the following method: First, roll a layer of transparent hard plastic film (commonly known as cellophane) on the shaft journal and even the shaft head, rub a little oil on the surface, put the oil seal into the shaft head wrapped in plastic film, evenly push the oil seal slowly to the shaft journal, and then pull out the plastic film. Note: Do not install the wrong direction of the lip, it should be toward the inside of the storage of oil, and the side with trademarks and specifications faces the outside. Because the lip 1:3 can only be one-way sealed, if the oil seal is reversed, it is bound to cause oil leakage, weakening the sealing effect or failure. It is necessary to avoid misplacing the oil seal or knocking it with tools such as a hammer on the surface of the oil seal, otherwise it is easy to cause damage to the oil seal.