National 42763 Wheel Seal - Rear Inner

Overview of National 42763 Wheel Seal for Jeep CJ5

The National 42763 wheel seal is designed specifically for Jeep CJ5 models, providing reliable sealing performance for driveline and axle applications. Constructed from durable nitrile material, this oil seal ensures effective protection against contaminants and fluid leaks.

• Inside diameter: 1.375 inches (34.930 mm)
• Outside diameter: 2.286 inches (58.060 mm)
• Housing bore: 2.282 inches (57.960 mm)
• Width: 0.250 inches (6.350 mm)
• Material: Nitrile rubber for resistance to oil and wear
• Type: 4s series oil seal

Detailed Product Description

The National 42763 wheel seal is part of the 40000 series, engineered to maintain a secure seal around the axle shaft of Jeep CJ5 vehicles. Its nitrile composition offers excellent resistance to oil, grease, and other automotive fluids, helping to prevent leaks and contamination. The precise dimensions, including a 1.375-inch shaft diameter and a 2.286-inch outside diameter, ensure a proper fit within the axle housing bore of 2.282 inches. This wheel seal is designed to withstand the rigors of off-road and daily driving conditions, maintaining axle integrity and prolonging component life.

Applications and Problem Solving

• Prevents oil leaks from the axle housing
• Protects wheel bearings from dirt and moisture intrusion
• Maintains proper lubrication within the driveline system
• Reduces wear on axle components by sealing contaminants out
• Helps avoid costly repairs related to axle 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 damage
• Check the seal orientation; the lip should face the lubricant side
• Inspect the shaft for wear or damage that could compromise the seal
• Apply a light coating of lubricant on the seal lip to ease installation and improve sealing

Quality Assurance and Warranty

National wheel seals, including part number 42763, are manufactured to meet industry standards for durability and performance. The nitrile material and precise engineering contribute to consistent sealing reliability. While specific warranty details may vary, National products typically come with a limited warranty against manufacturing defects, ensuring confidence in the product's quality and longevity.