Installing an Oil Seal – Step by Step Prior to Oil Seal Installation The oil seal should undergo thorough inspection to ensure there are no flaws or deformities. A very small scratch on the OD can cause leakage in the seal. Evaluate the bore to confirm no abrasions or residue are present. The seal and shaft should be lubricated, to ensure the lip protection during its first run. Ways to Install Oil seal installation tools are recommended for use when installing rotary shaft seals, to facilitate proper engagement and decreases the likelihood of seal cocking. When using a press fitting tool (preferably pneumatic or hydraulic press), make sure the tool has an OD .01″ (.25 mm) smaller than the size of the bore. Seal Cocking Seal cocking is when one side of the sealing lip has greater shaft interference, which can negatively impact the oil seal’s function. This causes higher heat generation and makes the sealing lip harden and crack. In worse cases, this may dislocate the spring from the sealing lip.        Spring Back When using a rubber-covered OD, the seal could spring back after installation. The rubber OD of the seal and the bore produce friction and can […] read more