National 493637 Wheel Seal - Front Inner

Overview of National 493637 Wheel Seal

The National 493637 wheel seal is engineered for reliable driveline protection in select Ford and Jeep vehicles. Designed with precision nitrile material and a Redicoat finish, this oil seal ensures effective sealing and durability for your vehicle's axle assembly.

• Inside diameter: 2.330 inches (59.180 mm)
• Outside diameter: 3.001 inches (76.230 mm)
• Housing bore diameter: 2.997 inches (76.120 mm)
• Width: 0.312 inches (7.920 mm)
• Material: Nitrile rubber with Redicoat coating
• Series: 490000, Type 49 oil seal

Detailed Product Description

The National 493637 wheel seal is part of the 490000 series, designed specifically to provide a secure seal around the axle shaft to prevent oil leakage and contamination. Constructed from durable nitrile rubber, this seal offers resistance to heat, oil, and wear, making it suitable for demanding automotive applications. The Redicoat finish enhances corrosion resistance and extends the service life of the seal. With precise dimensions including a 2.330-inch inside diameter and a 3.001-inch outside diameter, it fits tightly within the housing bore of 2.997 inches, ensuring optimal sealing performance.

Compatible Vehicles and Applications

This wheel seal is compatible with various Ford and Jeep models, including:

• Ford F-250 and F-350 trucks
• Ford E-250 Econoline and E-350 Econoline vans, including Club Wagon variants
• Jeep CJ7 and Scrambler models

Use the National 493637 wheel seal to maintain axle integrity and prevent oil leaks in these specific vehicles.

Common Issues Addressed by National 493637 Wheel Seal

• Prevents axle oil leaks that can cause driveline damage
• Protects against dirt and debris contamination in the axle housing
• Reduces premature wear of axle components due to lubricant loss
• Maintains proper lubrication for smooth wheel rotation
• Helps avoid costly repairs related to seal failure

Installation Notes and Tips

• Ensure the axle shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Verify the seal orientation matches the oil seal design to prevent leaks
• Check shaft surface for wear or damage that could affect seal performance
• Apply a light coating of lubricant on the seal lip before installation to reduce initial friction

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 493637 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.