National 370371A Wheel Seal - Rear Inner

Overview of National 370371A Wheel Seal

The National 370371A wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed with nitrile material, this oil bath seal ensures effective protection against contaminants and fluid leaks in compatible vehicle models.

• Part Number: 370371A
• Material: Durable nitrile for resistance to oil and wear
• Outside Diameter: 130.560 mm (5.140 inches)
• Housing Bore: 130.200 mm (5.126 inches)
• Shaft Diameter: 100.000 mm (3.937 inches)
• Width: 15.370 mm (0.605 inches)
• Installation Tool: Rd336 recommended
• Type: 11 oil bath seal

Detailed Product Description

The National 370371A wheel seal is part of the 370000 series, designed specifically for axle and driveline sealing systems. Constructed from nitrile, this seal offers excellent resistance to oil, heat, and wear, making it suitable for maintaining the integrity of oil bath environments. The precise dimensions, including a 130.560 mm outside diameter and a 100 mm shaft diameter, ensure a secure fit within the housing bore of 130.200 mm. This seal is engineered to minimize leakage and prevent contamination, which is critical for maintaining axle performance and longevity.

Applications and Problem Solving

• Prevents oil leaks in axle assemblies
• Protects driveline components from dirt and debris
• Maintains proper lubrication within oil bath systems
• Reduces wear on shafts and housings
• Helps avoid costly drivetrain repairs due to seal failure

Installation Notes and Tips

For optimal installation of the National 370371A wheel seal, use the Rd336 installation tool to ensure proper seating without damaging the seal. Verify shaft and housing bore dimensions before installation to confirm compatibility. Clean the installation area thoroughly to remove any debris or old sealant. Lubricate the seal lip lightly with clean oil to facilitate smooth installation and initial operation.

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 370371A 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.