National 474230 Wheel Seal - Front Inner

National 474230 Wheel Seal Overview

The National 474230 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 prevent contamination in wheel hubs, making it suitable for various vehicle makes and models requiring a 2.874 inch shaft diameter.

• Inside diameter: 2.874 inches (73.000 mm)
• Outside diameter: 3.548 inches (90.120 mm)
• Housing bore: 3.543 inches (90.000 mm)
• Width: 0.315 inches (8.000 mm)
• Material: Durable nitrile rubber for resistance to oil and wear
• Series: 470000, Type: 47 oil seal

Technical Details and Specifications

The National 474230 wheel seal is constructed from nitrile, a synthetic rubber known for its excellent resistance to petroleum-based oils and greases. This seal features an inside diameter of 2.874 inches (73 mm) designed to fit shafts of the same size, while the outside diameter measures 3.548 inches (90.12 mm) to fit securely within the housing bore of 3.543 inches (90 mm). With a width of 0.315 inches (8 mm), this seal ensures a tight fit to prevent leakage and contamination in axle assemblies.

Applications and Problem Solving

This wheel seal is commonly used in driveline and axle assemblies for vehicles requiring precise sealing solutions. It is compatible with various makes and models that specify a 2.874 inch shaft diameter and 3.548 inch outside diameter seal. The National 474230 part number is often sought for maintenance and repair of wheel hubs to address issues such as:

• Oil leakage from wheel hubs
• Contamination of axle bearings by dirt and debris
• Premature wear of driveline components due to inadequate sealing
• Noise and vibration caused by seal failure
• Maintaining proper lubrication within axle assemblies

Installation Notes and Tips

When installing the National 474230 wheel seal, ensure the shaft and housing bore are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the original installation to maintain proper oil retention. Lubricate the seal lip lightly with compatible grease before installation to reduce initial wear.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 474230 oil seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.