National 710825 Drive Axle Shaft Seal - Front Outer

Overview of National 710825 Drive Axle Shaft Seal

The National 710825 drive axle shaft seal is engineered for reliable sealing performance in Ford Excursion, F-250 Super Duty, and F-350 Super Duty models. Designed with durable polyacrylate material, this oil seal helps maintain driveline integrity by preventing leaks and contamination.

• Constructed from high-quality polyacrylate for durability
• Includes oil seal and o-ring for enhanced sealing
• Inside diameter: 2.881 inches (73.180 mm)
• Outside diameter: 4.504 inches (114.097 mm)
• Thickness/width: 1.440 inches (36.580 mm)
• Hand installable design for easier replacement
• Compatible with Ford Excursion, F-250 Super Duty, and F-350 Super Duty

Detailed Product Description

The National 710825 drive axle shaft seal is part of the 710800 series, designed specifically for driveline and axle sealing applications. Its polyacrylate construction offers resistance to heat, oil, and wear, ensuring a long service life. The seal features precise dimensions with an inside diameter of 2.881 inches and an outside diameter of 4.504 inches, matching the housing bore of 4.492 inches to provide a secure fit. The included o-ring enhances sealing capability, reducing the risk of oil leaks and contamination in the axle assembly. This seal is engineered for use in Ford Excursion, F-250 Super Duty, and F-350 Super Duty vehicles, making it a reliable replacement part for maintaining driveline performance.

Common Applications and Problem Solving

• Prevents oil leaks from the drive axle shaft
• Protects axle components from dirt and debris intrusion
• Reduces wear on axle shaft bearings by maintaining lubrication
• Helps avoid driveline noise caused by seal failure
• Maintains proper axle shaft alignment and sealing integrity

Installation Notes and Tips

The National 710825 seal features a hand installable design, simplifying the replacement process. When installing, ensure the housing bore and shaft dimensions match the seal specifications to avoid improper fitment. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip or o-ring. Clean the installation area thoroughly to prevent contamination and verify that the seal is seated flush to maintain optimal sealing performance.

Quality Assurance and Warranty

Manufactured by National, a recognized brand in driveline sealing systems, the 710825 drive axle shaft seal meets industry standards for durability and performance. The polyacrylate material and precise engineering contribute to consistent sealing under demanding conditions. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship, providing confidence in the product's reliability for Ford Excursion, F-250 Super Duty, and F-350 Super Duty applications.