National 6985 Wheel Seal - Front Inner

Overview of National 6985 Wheel Seal for Chevrolet and Pontiac

The National 6985 wheel seal is designed to provide reliable sealing performance for driveline and axle applications. Specifically compatible with Chevrolet Bel Air and Pontiac Laurentian models, this oil seal helps maintain proper lubrication and prevent contamination in wheel hubs.

• Inside diameter: 1.875 inches (47.630 mm)
• Outside diameter: 2.633 inches (66.880 mm)
• Housing bore: 2.628 inches (66.750 mm)
• Width: 0.347 inches (8.810 mm)
• Material: Felt
• Series: 6000
• Type: 29 oil seal

Detailed Product Description

The National 6985 wheel seal is engineered with a felt sealing material that offers effective oil retention and protection against dirt and debris ingress. Its precise dimensions, including a 1.875-inch inside diameter and a 2.633-inch outside diameter, ensure a secure fit within the wheel hub assembly. The 0.347-inch width provides adequate sealing surface area to maintain axle lubrication and prevent leaks. This seal belongs to the 6000 series and is classified as a Type 29 oil seal, suitable for use in driveline and axle sealing systems.

Applications and Problem Solving

This wheel seal is compatible with specific classic vehicle models, including Chevrolet Bel Air and Pontiac Laurentian, making it a suitable replacement part for maintaining original equipment specifications. It addresses common issues such as:

• Preventing oil leaks from wheel hubs
• Protecting axle bearings from dirt and moisture contamination
• Maintaining proper lubrication within the driveline system
• Reducing wear and extending component life
• Ensuring reliable wheel seal performance under normal operating conditions

Installation Notes and Tips

• Ensure the housing bore and shaft dimensions match the seal specifications before installation
• Clean the sealing surfaces thoroughly to remove old grease, dirt, and debris
• Use appropriate tools to press the seal evenly into the housing bore without distortion
• Inspect the shaft for wear or damage that could compromise the seal
• Apply a light coating of lubricant on the seal lip to facilitate installation and initial operation

Quality Assurance and Warranty

National wheel seals are manufactured to meet industry standards for durability and performance. The 6985 part number undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support long-term reliability in Chevrolet Bel Air and Pontiac Laurentian applications.