



The shaft on which the oil seal is mounted has to be ground to a rough surface finish. The shaft also should be hardened to prevent grooves forming on the shaft when the pressure is exerted by the spring on the seal. The area where the seal is fitted also has to be ground to prevent grooves that tend to wear out the lip of the oil seal faster than normal.
internal, external and axial orientation
(visible lead marks)
Different Types of Oil Seals
Engine Oil Seal, Power Steering Oil Seal, and Motor Oil Seal: Essential Components in Automotive Systems
Before fitting the oil seal, it is essential to check that the oil seal, shaft and bore are clean and undamaged. The surfaces the oil seal will come into contact with must be free of sharp points or burrs. The sealing lip is fragile, so even minimal damage can cause a leak. It is also important that the shaft and bore are correctly finished.
Cover the valve gear with a clean cloth to prevent dirt getting into the working parts of the engine.


CS