National 370023A Wheel Seal - Rear Inner

Overview of National 370023A Wheel Seal

The National 370023A wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed with nitrile material and a dynamic edge, this oil bath seal ensures effective protection against contaminants and fluid leaks in compatible vehicles.

• Part Number: 370023A
• Material: Durable nitrile for resistance to oil and wear
• Type: 11 oil bath wheel seal with dynamic edge design
• Outside Diameter: 144.93 mm (5.704 inches)
• Housing Bore: 144.53 mm (5.689 inches)
• Shaft Diameter: 98.43 mm (3.875 inches)
• Width: 22.23 mm (0.880 inches)
• Installation Tool Recommended: RD309

Detailed Product Description

The National 370023A 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 demanding automotive environments. The dynamic edge design enhances sealing efficiency by maintaining consistent contact with the shaft, reducing the risk of leaks and contamination ingress. With precise dimensions including a 144.93 mm outside diameter and a 98.43 mm shaft diameter, this seal fits securely within the housing bore of 144.53 mm, ensuring a tight and reliable fit.

Applications and Problem Solving

This wheel seal is compatible with various vehicle makes and models requiring a 3.875-inch shaft diameter and 5.704-inch outside diameter seal. It is commonly used in axle assemblies where oil bath seals are necessary to maintain lubrication and prevent contamination.

• Prevents oil leaks in axle and driveline assemblies
• Protects bearings from dirt, dust, and moisture intrusion
• Maintains lubrication integrity for extended component life
• Reduces risk of seal failure due to wear or heat exposure
• Ensures proper fitment in housings with a 5.689-inch bore diameter

Installation Notes and Tips

For optimal installation of the National 370023A wheel seal, use the recommended RD309 installation tool to avoid damage to the seal lip or housing. Ensure the shaft and housing bore are clean and free of debris before installation. Proper alignment during installation is critical to maintain the dynamic edge contact and prevent premature wear.

Quality Assurance and Warranty

National wheel seals are manufactured to meet strict quality standards for durability and performance. The 370023A seal undergoes rigorous testing to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, National products typically adhere to industry standards for reliability and service life.