National 710925 Drive Axle Shaft Seal - Front Outer

Overview of National 710925 Drive Axle Shaft Seal

The National 710925 drive axle shaft seal is engineered for reliable sealing performance in Ford Excursion, F-250 Super Duty, and F-350 Super Duty vehicles. Constructed from durable polyacrylate material, this oil seal helps maintain axle integrity by preventing fluid leaks and contamination.

• Material: Polyacrylate for enhanced durability and resistance
• Flanged Outside Diameter: 0.997 inches
• Housing Bore Diameter: 5.465 inches (138.811 mm)
• Outside Diameter: 5.479 inches (139.167 mm)
• Overall Width with Side Lip: 1.213 inches (30.810 mm)
• Shaft Diameter: 3.545 inches (90.043 mm)
• Width: 0.646 inches (16.408 mm)
• Part Number: 710925, Series 710900

Detailed Product Description

The National 710925 drive axle shaft seal is designed to fit specific Ford models including the Excursion, F-250 Super Duty, and F-350 Super Duty. Its polyacrylate construction offers resistance to heat, oil, and wear, ensuring a long service life under demanding conditions. The seal’s precise dimensions, such as a flanged outside diameter of 0.997 inches and a housing bore diameter of 5.465 inches, provide a secure fit to prevent axle lubricant leakage and protect driveline components from dirt and moisture intrusion.

Applications and Problem Solving

• Prevents oil leaks from the drive axle shaft area
• Protects axle bearings and gears from contamination
• Maintains proper lubrication within the axle housing
• Reduces risk of driveline component wear and failure
• Ensures reliable performance in Ford Excursion and Super Duty trucks

Installation Notes and Tips

When installing the National 710925 drive axle shaft seal, ensure the housing bore and shaft surfaces are clean and free of debris. Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip. Verify the seal orientation matches the original part to maintain proper sealing function. Lubricate the seal lip lightly with axle grease before installation to reduce initial wear.

Quality Assurance and Warranty

National drive axle shaft seals are manufactured to meet OEM specifications for fit and function. The 710925 seal undergoes quality control checks to ensure dimensional accuracy and material integrity. While specific warranty details are not provided, National products typically adhere to industry standards for durability and performance in automotive sealing applications.