National 9864S Wheel Seal - Rear Inner

National 9864S Wheel Seal Overview

The National 9864S wheel seal is engineered for reliable driveline sealing in Ford trucks and vans. Designed with nitrile material and precise dimensions, this oil seal ensures effective protection against contaminants and fluid leaks in Ford E-250, E-350, F-250, and F-350 models.

• Inside diameter: 2.875 inches (73.03 mm)
• Outside diameter: 3.880 inches (98.55 mm)
• Flanged outside diameter: 4.200 inches (106.68 mm)
• Housing bore: 3.875 inches (98.43 mm)
• Width: 0.515 inches (13.08 mm)
• Material: durable nitrile rubber
• Redicoat surface treatment for enhanced wear resistance
• Series 9000, Type 57 oil seal design

Detailed Product Description

The National 9864S wheel seal is part of the Series 9000 line, known for its robust sealing capabilities in automotive driveline applications. Constructed from nitrile, this seal offers resistance to oil, grease, and other automotive fluids, maintaining integrity under demanding conditions. The Redicoat coating improves the seal’s durability by reducing friction and wear during operation. With an inside diameter of 2.875 inches and an outside diameter of 3.880 inches, it fits precisely within the housing bore of 3.875 inches, ensuring a secure and leak-free installation. The flanged outside diameter of 4.200 inches provides additional stability and sealing surface area.

Compatible Vehicles and Applications

This wheel seal is compatible with a range of Ford trucks and vans, including:

• Ford E-250 Econoline and E-250 Econoline Club Wagon
• Ford E-350 Club Wagon, E-350 Econoline, and E-350 Econoline Club Wagon
• Ford E-350 Super Duty
• Ford F-250 and F-350 Super Duty trucks

Common Issues Addressed by National 9864S Wheel Seal

• Prevents oil leaks from wheel hubs and axle assemblies
• Protects driveline components from dirt, dust, and moisture intrusion
• Reduces premature wear of axle shafts and bearings
• Maintains proper lubrication within the axle housing
• Helps avoid costly driveline repairs due to seal failure

Installation Notes and Tips

• Ensure the housing bore and shaft are clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify the seal orientation matches the vehicle manufacturer’s specifications
• Apply a light coat of lubricant on the seal lip to facilitate installation and initial operation
• Inspect the seal after installation for proper seating and alignment

Quality Assurance and Warranty

National wheel seals, including the 9864S, are manufactured to meet stringent industry standards for durability and performance. The nitrile material and Redicoat treatment contribute to long service life under typical operating conditions. While specific warranty details may vary, National products generally come with a limited warranty against manufacturing defects. Always consult the product documentation or vehicle service manual for warranty and installation guidance.