The oil seal within the wheel hub assembly is crucial for preserving the lubrication of the wheel bearings and protecting them from premature wear and damage. Proper maintenance of the oil seal wheel hub is essential to prevent oil leakage and maintain the efficiency of the wheel assembly. Regular inspection and replacement of worn or damaged oil seals are vital to ensure the continued reliability and safety of the vehicle.
Figure 5 explains the JTEKT seal numbering system.
Seal numbers consist of
(1) the seal type code,
(2) the spring code,
(3) the lip type code,
(4) the dimensional numbers, and
(5) the special type code,
and Table 6 shows examples of each of these codes/numbers.
Oil seal specifications

Synthetic blend oil offers the best of both worlds. It has many of the characteristics of full synthetic oil, but at a much lower price. This type of oil is a mixture of synthetic and conventional base oils, plus some additives, for extra resistance to oxidation and excellent low-temperature properties. Synthetic blends make it easy for drivers to make the switch from conventional to synthetic oil, which is why this type of oil is becoming increasingly popular among today’s savviest drivers. It’s also a great middle ground for drivers who want the added protection and performance of a synthetic oil, but might not be ready to foot the bill for a total switch to full synthetic oil.
Oil seals are typically classified based on their sealing capabilities, with common types including lip seals, mechanical seals, and hydraulic seals. Lip seals are the most basic type, consisting of a flexible lip that seals against the shaft. Mechanical seals use sliding or rotating components to create a seal, while hydraulic seals are designed for high-pressure applications.

Cassette Seals




Car spark plugs are integral to the efficient operation of the engine, contributing significantly to the vehicle's overall performance and fuel economy. These plugs are designed to withstand high temperatures and pressures within the combustion chamber, providing reliable ignition and combustion. Properly functioning car spark plugs are essential for maintaining smooth engine operation, fuel efficiency, and emissions control, making them a critical component in the overall reliability and longevity of the vehicle.