National 370018A Wheel Seal - Rear Inner

Overview of National 370018A Wheel Seal for Ford F-350 Super Duty

The National 370018A wheel seal is engineered for reliable driveline performance in Ford F-350 Super Duty trucks. Designed as an oil bath seal, it provides effective sealing to protect axle components from contaminants and maintain lubrication integrity.

• Compatible with Ford F-350 Super Duty models
• Part number 370018A for precise identification
• Constructed from durable nitrile material for resistance to wear and oil
• Redicoat finish enhances corrosion protection
• Dimensions: 4.506 inch (114.45 mm) outside diameter, 0.605 inch (15.37 mm) width
• Housing bore diameter of 4.500 inch (114.3 mm) ensures proper fit
• Designed for shaft diameter of 3.250 inch (82.55 mm)
• Installation tool recommended: RD275

Detailed Product Description and Specifications

The National 370018A wheel seal is part of the 370000 series, specifically designed for driveline and axle sealing applications. This oil bath seal features a nitrile elastomer construction, which offers excellent resistance to oil, heat, and environmental contaminants. The seal’s outside diameter measures 114.45 mm (4.506 inches), with a width of 15.37 mm (0.605 inches), matching the housing bore diameter of 114.3 mm (4.500 inches) for a secure fit. It is engineered to accommodate an axle shaft diameter of 82.55 mm (3.250 inches), making it suitable for the Ford F-350 Super Duty’s driveline components. The Redicoat coating provides additional corrosion resistance, extending the service life of the seal under demanding conditions.

Common Applications and Problem Solving

• Prevents oil leaks from axle housings in Ford F-350 Super Duty trucks
• Protects axle bearings and components from dirt and moisture intrusion
• Maintains proper lubrication within the driveline system
• Reduces risk of premature wear due to contamination
• Helps avoid costly driveline repairs by ensuring seal integrity

Installation Notes and Tips

For optimal installation of the National 370018A wheel seal, use the recommended RD275 installation tool to ensure proper seating without damaging the seal. Verify that the housing bore and shaft dimensions match the specified measurements to avoid fitment issues. Clean the installation area thoroughly to remove debris and old sealant before fitting the new seal. Proper alignment during installation is critical to prevent leaks and premature seal failure.

Quality Assurance and Warranty Information

National wheel seals are manufactured to meet industry standards for durability and performance. The 370018A seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, National products typically adhere to OEM quality requirements, offering dependable service life when installed correctly.