

A shaft oil seal, also known as a lip seal, is typically made of rubber or other flexible materials, with a lip that seals against the rotating shaft. It is designed to effectively seal the interface between the shaft and the housing, preventing the entry of dirt, dust, water, and other contaminants that could potentially damage the machinery.
On engines that rotate anti clockwise (viewed from the front) the pulley bolt unscrews clockwise.
As earlier said, oil seals perform some functions that ensure the functionality of mechanical equipment and extend their lifespan. And how they do this is by retaining lubricants at all cost and not making them escape no matter how high the pressure of the machine is.
Oil Seals: Function & Maintenance
Seal Oil Pan, Oil Seal Turbo, and Oil Gasket Seal: Essential Components in Automotive Systems
Several variables must be considered when selecting oil seals. The physical dimensions and materials will vary depending on the environment of use. In addition, oil seals must remain lightweight, compact, and exhibit high self-lubrication performance.


Advantages:
– Very good fitting stability avoiding pop-out of the seal
– Modern lip design provides low radial forces
– Superior radial stiffness, especially for very large diameters
– Cost effective for expensive elastomer materials
– Suitable for use in combination with axial seal
ERIKS also supplies the types GR and GRST. These are virtually identical to the types R and RST, except in this case the metal inner ring is also completely encased in rubber. ERIKS uses FKM rubber here as standard, so these seals are ideal for use in acidic environments.
Aluminum alloys and resin (materials with a large difference between the linear expansion coefficients) demand sufficient consideration (as there is a risk of failure due to the increased clearance with the oil seal at high temperatures).
Table 4: JTEKT oil seal type codes and corresponding ISO and JIS standards
Double metal cased
Oil seal WG1087811 is used by several automotive manufacturers, such as Opel, Fiat and Suzuki, and serves as a good example for an oil seal where oil leakage can occur if fitted incorrectly.