TOYOTA 90311-62007 Wheel Hub Oil Seal

The genuine OEM Toyota 90311-62007 wheel hub oil seal (radial shaft seal) is a premium-quality precision sealing component that plays a vital role in ensuring proper lubrication and protection for wheel bearings. This "Type T" oil seal is specifically engineered to prevent lubricant (grease or oil) leakage from the wheel hub while effectively keeping out external contaminants such as dust, water, and road debris.

Technical Specifications and Construction:

• Type: Type T (specialized radial shaft seal with dust lip)
• Material: High heat- and wear-resistant elastomer offering outstanding resistance to transmission oils and lubricating greases
• Design: Sealing lip equipped with an integrated garter spring for optimal radial clamping force and a dependable seal
• Protection: Additional dust lip that prevents fine dust particles and moisture from penetrating the bearing cavity

Function and Importance of the Wheel Hub Oil Seal:

The wheel hub seal provides direct protection to the wheel bearing. If the oil seal degrades or becomes damaged, grease can escape, causing the bearing to overheat, wear prematurely, and ultimately seize. Additionally, leaking lubricant can contaminate brake system components (brake discs and brake pads), drastically reducing braking performance and creating a serious safety hazard.

Typical Signs of Failure:

• Oil or grease spots visible on the inner side of the wheel rim or around the brake caliper
• Abnormal humming, roaring, or rumbling noise from the wheels while driving (indicating bearing damage caused by lubricant starvation)
• Visibly identifiable cracks, hardening, or physical damage to the sealing ring