National 710091 Wheel Seal - Front Inner

National 710091 Wheel Seal Overview

The National 710091 wheel seal is engineered for reliable sealing performance in Ford Bronco and F-150 driveline systems. Designed with precision dimensions and durable nitrile material, this oil seal helps maintain axle integrity and prevent fluid leaks.

• Inside diameter: 2.700 inches (68.58 mm)
• Outside diameter: 3.504 inches (89.002 mm)
• Flanged outside diameter: 3.704 inches (94.082 mm)
• Overall width with side lip: 0.462 inches (11.73 mm)
• Width: 0.310 inches (7.874 mm)
• Material: Nitrile rubber for resistance to oil and wear
• Redicoat coating for enhanced corrosion protection
• Series: 710000, Type: 272

Detailed Product Description

The National 710091 wheel seal is a critical component in the driveline and axle assembly, specifically designed to fit Ford Bronco and F-150 models. Constructed from nitrile, this oil seal offers excellent resistance to petroleum-based fluids and high temperatures commonly encountered in automotive applications. The precise inside diameter of 2.700 inches (68.58 mm) and outside diameter of 3.504 inches (89.002 mm) ensure a secure fit on the axle shaft and housing bore, which measures approximately 3.499 inches (88.875 mm). The flanged outside diameter of 3.704 inches (94.082 mm) provides additional sealing surface and stability during operation. The overall width with side lip of 0.462 inches (11.73 mm) helps maintain a tight seal to prevent contamination and fluid leakage.

Common Applications and Problem Solving

• Prevents axle oil leaks in Ford Bronco and F-150 wheel hubs
• Protects driveline components from dirt and debris ingress
• Reduces wear on axle shafts by maintaining proper lubrication
• Helps avoid costly repairs due to seal failure or contamination
• Maintains optimal performance of the vehicle’s driveline system

Installation Notes and Tips

When installing the National 710091 wheel seal, ensure the axle shaft and housing bore are clean and free of debris. Lubricate the seal lip with appropriate axle grease to reduce initial wear during startup. Use a seal driver tool to press the seal evenly into the housing bore without distortion. Verify the seal is fully seated and the flanged outside diameter aligns properly with the hub assembly. Regular inspection during maintenance intervals can help detect early signs of wear or leakage.

Quality Assurance and Warranty

National wheel seals, including part number 710091, are manufactured to meet industry standards for durability and performance. The nitrile material and Redicoat corrosion-resistant coating contribute to extended service life. While specific warranty terms may vary, National products typically come with a limited warranty against manufacturing defects. Consult product documentation or supplier for detailed warranty information.