National 473473 Wheel Seal - Front Inner

National 473473 Wheel Seal Overview

The National 473473 wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed with precision, this oil seal helps maintain proper lubrication and prevents contaminants from entering the wheel hub assembly.

• Inside diameter: 2.250 inches (57.150 mm)
• Outside diameter: 3.066 inches (77.880 mm)
• Width: 0.375 inches (9.530 mm)
• Material: Durable nitrile compound
• Redicoat coating for enhanced corrosion resistance
• Series: 470000, Type: 47
• Housing bore: 3.061 inches (77.750 mm)
• Zero duplication part ensuring unique fitment

Technical Details and Material Specifications

This National wheel seal (part number 473473) is constructed from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. The seal features a Redicoat finish, which provides additional protection against corrosion and extends service life. With an inside diameter of 2.250 inches and an outside diameter of 3.066 inches, it is designed to fit shafts and housings with precise tolerances, including a housing bore of approximately 3.061 inches. The 0.375-inch width ensures a secure fit within the axle assembly, minimizing the risk of leaks.

Compatible Vehicle Applications

This wheel seal is compatible with a range of driveline and axle assemblies commonly found in vehicles requiring a 2.250-inch shaft seal. It is suitable for use in various makes and models where National 473473 is specified, including certain Ford, Chevrolet, and Dodge trucks and SUVs. Always verify fitment with your vehicle’s service manual or parts catalog to ensure compatibility.

Common Issues Addressed by National 473473 Wheel Seal

• Prevents oil leaks from axle hubs
• Protects wheel bearings from dirt and moisture contamination
• Reduces premature bearing wear due to lubricant loss
• Maintains proper lubrication within the driveline system
• Helps avoid costly axle and bearing repairs

Installation Notes and Tips

When installing the National 473473 wheel seal, ensure the shaft and housing surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Lubricate the seal lip lightly with clean gear oil before installation to reduce initial wear. Verify the seal orientation matches the original part to maintain proper sealing function.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 473473 part is a zero duplication part, ensuring unique fitment and quality control. While specific warranty terms may vary, National typically offers coverage against manufacturing defects. Consult the product documentation or supplier for detailed warranty information.