National 472856 Wheel Seal - Rear or Rear Inner

Overview of National 472856 Wheel Seal for Ford F-250

The National 472856 wheel seal is engineered to provide reliable sealing performance for Ford F-250 driveline systems. Designed with precision, this oil seal helps maintain proper lubrication and prevents contaminants from entering the axle assembly.

• Inside diameter: 2.375 inches (60.330 mm)
• Outside diameter: 3.355 inches (85.220 mm)
• Width: 0.438 inches (11.130 mm)
• Material: Durable nitrile compound
• Redicoat coating for enhanced corrosion resistance
• Series: 470000, Type: 47 oil seal
• Compatible with Ford F-250 models

Technical Details and Material Specifications

This National wheel seal (part number 472856) features a nitrile rubber construction, chosen for its resistance to oil, heat, and wear. The seal’s inside diameter measures 2.375 inches (60.330 mm), matching the shaft size of the Ford F-250 axle. The outside diameter is 3.355 inches (85.220 mm), designed to fit securely within a housing bore of approximately 3.350 inches (85.090 mm). The 0.438-inch (11.130 mm) width ensures a tight seal to prevent oil leakage and contamination.

The Redicoat finish on the metal case provides additional protection against rust and corrosion, extending the service life of the seal in demanding environments.

Applications and Problem Solving

This wheel seal is specifically compatible with Ford F-250 trucks, making it suitable for maintenance or repair of the driveline and axle sealing systems. It addresses common issues such as:

• Preventing oil leaks from axle assemblies
• Protecting bearings and internal components from dirt and moisture
• Reducing wear caused by contamination
• Maintaining proper lubrication within the driveline
• Ensuring reliable axle performance under heavy-duty conditions

Installation Notes and Tips

When installing the National 472856 wheel seal, ensure the housing bore is clean and free of debris. Use appropriate tools to press the seal evenly into place without damaging the sealing lip or the nitrile material. Verify the seal orientation matches the original part, with the sealing lip facing the lubricant side. Proper installation helps maintain the integrity of the seal and prevents premature failure.

Quality Assurance and Warranty

National’s 472856 wheel seal is manufactured to meet industry standards for durability and performance. The nitrile material and Redicoat finish contribute to long-lasting service life. While specific warranty details may vary, National typically offers coverage against manufacturing defects to ensure customer confidence in their products.