Thoroughly clean the area around the oil seal and check how it is fitted. If you cannot see the outer end of the seal, remove the timing-belt cover or chain cover (not the belt or chain) and possibly the water pump (See Replacing a water pump ) to reveal it. On an engine with a belt-driven overhead camshaft , remove the belt and its drive sprocket .
Early engines used O-rings (also called packing rings or toric joints) as seals (first patented in 1896). These are just mechanical gaskets in the shape of a torus (a circular ring--like a lifesaver), seated in a groove and compressed during assembly between two or more parts. It creates a seal at the interface. However, O-rings require a fluid film to lubricate them. They have limited usefulness in vacuum application and at extremes of temperature. The modern oil seal represents a significant improvement over the simple O-ring because it effectively seals in lubrication and prevents contamination from outside under a wide range of pressures and temperatures.
The allowable total eccentricity is the maximum total eccentricity at which the sealing edge can accommodate shaft rotation and retain adequate sealing performance. The oil seal's allowable total eccentricity is affected by the design of the oil seal, the accuracy of the shaft, and the operating conditions.
The 35x47x7 oil seal is a reliable and versatile sealing solution that offers numerous benefits for various mechanical systems. Its precise dimensions, high-quality materials, and effective design make it an essential component for maintaining the integrity and efficiency of machinery. Whether you're working in automotive, industrial, or marine applications, the 35x47x7 oil seal is sure to meet your sealing needs. A steering oil seal, primarily made from high-quality rubber or synthetic materials, is designed to seal the interface between the steering gear and the steering shaft. It prevents oil, the lifeblood of the power steering system, from leaking out and contaminants like dirt, dust, and water from infiltrating the system. This is essential because any compromise in the sealing can lead to reduced steering efficiency, increased wear on components, and, in extreme cases, total failure of the power steering system.
In general, oil seals should be selected in the order of priority indicated in Table 1.