(1) Before installing the floating oil seal, check the lip of the floating oil seal for cracks, cracks or oily corrosion. If there are any such defects, replace the new oil seal.

(2) Check the shaft journal for scars, especially long scars along the axial direction, and whether the surface is rough. If the surface of the shaft journal causes serious bludgeoning scars due to improper disassembly and assembly, the oil seal lip and the shaft journal surface will not fit tightly, causing oil leakage. If the surface of the journal is too rough, it is easy to damage the oil seal or accelerate the wear of the lip 1:3, destroying its sealing performance. In the above two cases, the scar can be re-turned on the lathe according to the specified journal size after surfacing welding, or replaced with a new shaft. If the shaft journal has only metal burrs or flashing on the shaft head, it can be smoothed with a file to prevent the oil seal lip from being damaged when the oil seal is installed.

(3) During the installation of the floating oil seal, keep the oil seal (especially the lip part) and the shaft neck part clean, and be careful not to make the oil seal self-tightening spring jump out of the spring groove. If the self-tightening spring is loose and its elasticity is weakened, it can be cut off according to the situation, and the two ends can be connected firmly to continue using.

(4) When installing the skeleton oil seal on the floating oil seal, in order to prevent the oil seal lip 121 from being stretched, deformed or scratched and damaged, a special installation tool must be used. If you don’t have this tool, you can install it according to this operation: First, roll a layer of transparent hard plastic film (commonly known as cellophane) on the journal and even the shaft head, apply a little oil on the surface, and cover the oil seal. The shaft head of the plastic film slowly pushes the oil seal to the journal with even force, and then pulls out the plastic film. Note: Do not install the lip in the wrong direction. It should face the inner side where the oil is stored, and the side with the trademark and specifications should face the outer side. Because the lip 1:3 can only be sealed in one direction, if the oil encapsulation is reversed, it will inevitably cause oil leakage, weakening of the sealing effect or failure. Avoid crooking the oil seal or banging it on the surface of the oil seal with a hammer or other tools, otherwise it is easy to cause damage to the oil seal.