National 450143 Wheel Seal - Rear Inner

National 450143 Wheel Seal Overview

The National 450143 wheel seal is engineered to provide reliable sealing performance for driveline and axle applications. Designed with precision, this oil seal features nitrile material construction and specific dimensions to ensure compatibility with various vehicle makes and models requiring a 1.562 inch shaft diameter and 2.565 inch outside diameter.

• Inside diameter: 1.562 inches (39.670 mm)
• Outside diameter: 2.565 inches (65.150 mm)
• Width: 0.500 inches (12.700 mm)
• Material: Durable nitrile for oil resistance
• Redicoat surface treatment for enhanced sealing
• Housing bore: 2.561 inches (65.050 mm)
• Series: 450000
• Type: 45 oil seal
• Zero duplication part ensuring unique fitment

Technical Details and Material Specifications

The National 450143 wheel seal is constructed from nitrile, a synthetic rubber known for its resistance to oil, heat, and wear. This material choice supports long-term durability in axle and driveline environments. The seal’s dimensions are carefully matched to fit shafts with a 1.562 inch diameter and housings with a bore diameter of approximately 2.561 inches, making it suitable for specific automotive applications. The Redicoat treatment enhances the seal’s surface, improving its ability to maintain a tight seal under varying operating conditions.

Applications and Problem Solving

This wheel seal is designed for use in driveline and axle assemblies where maintaining oil containment and preventing contamination are critical. It addresses common issues such as:

• Preventing oil leaks from axle shafts
• Reducing contamination ingress into bearing areas
• Minimizing wear caused by dirt and debris
• Maintaining proper lubrication within the axle housing
• Ensuring consistent performance in vehicles requiring a 1.562 inch shaft seal

Installation Notes and Tips

When installing the National 450143 wheel seal, ensure the housing bore and shaft dimensions match the specified measurements for optimal fit. Clean the sealing surfaces thoroughly before installation to avoid premature wear. Use appropriate tools to press the seal evenly into the housing bore without distortion. Avoid damaging the sealing lip during installation to maintain effective sealing performance.

Quality Assurance and Warranty

National wheel seals, including part number 450143, are manufactured to meet industry standards for durability and performance. The zero duplication part designation ensures a unique and precise fit. While specific warranty details are not provided, National products typically adhere to strict quality control processes to support reliable operation in automotive driveline systems.