FAG SS3940 Wheel Seal - Rear Inner

Reliable Wheel Seal for Driveline and Axles

The FAG SS3940 wheel seal is engineered to provide durable sealing performance in automotive driveline and axle applications. Designed with a metal spring, auxiliary lip, and inner shell, this wheel seal ensures effective protection against contaminants and fluid leaks.

• Seal Type: Metal with spring, auxiliary lip, and inner shell for enhanced sealing
• Sealing Material: Nitrile for resistance to oils and wear
• Bore Diameter: 112.979 mm (4.448 inches)
• Seal Outside Diameter: 113.208 mm (4.457 inches)
• Seal Width: 21.996 mm (3.149 inches)

Technical Details and Specifications

The FAG SS3940 wheel seal features a robust construction combining a metal spring and auxiliary lip design to maintain a tight seal under varying operating conditions. The nitrile sealing material offers excellent resistance to automotive fluids, ensuring longevity and reliability. With precise bore and outside diameters of approximately 113 mm and a width near 22 mm, this seal fits specific driveline and axle assemblies requiring these exact dimensions.

Applications and Problem Solving

• Prevents axle grease leakage in wheel hubs
• Protects bearings from dirt, dust, and moisture ingress
• Reduces risk of premature bearing failure due to contamination
• Maintains proper lubrication within driveline components
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

When installing the FAG SS3940 wheel seal, ensure the bore and housing are clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip or metal components. Verify the seal orientation matches the original part to maintain proper sealing function. Lubricate the sealing lip lightly with compatible grease before installation to reduce initial wear.

Quality Assurance and Warranty

FAG manufactures the SS3940 wheel seal to meet stringent automotive standards for durability and performance. The use of nitrile sealing material and metal spring components ensures consistent sealing under typical operating conditions. While specific warranty details are not provided, FAG products are generally backed by quality controls aligned with OEM requirements.