National 710494 Drive Axle Shaft Seal - Front Outer

Overview of National 710494 Drive Axle Shaft Seal

The National 710494 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 is designed to maintain axle integrity and prevent fluid leaks under demanding conditions.

• Material: Polyacrylate for enhanced durability and resistance
• Inside Diameter: 2.874 inches (72.990 mm)
• Outside Diameter: 4.470 inches (113.550 mm)
• Flanged Outside Diameter: 0.827 inches (21.000 mm)
• Thickness/Width: 1.163 inches (29.550 mm)
• Housing Bore Diameter: 4.448 inches (113.000 mm)
• Part Number: 710494, Series 710400

Detailed Product Description

The National 710494 drive axle shaft seal is specifically designed to fit Ford Excursion, F-250 Super Duty, and F-350 Super Duty models, ensuring precise compatibility and optimal performance. Made from polyacrylate, this seal offers excellent resistance to heat, oil, and wear, which is critical for maintaining the integrity of the driveline system. The seal’s dimensions, including a 2.874-inch inside diameter and a 4.470-inch outside diameter, correspond to the axle shaft and housing bore sizes of the specified Ford models. The flanged outside diameter of 0.827 inches provides a secure fit within the axle housing, while the 1.163-inch thickness ensures a robust sealing surface to prevent oil leakage and contamination.

Common Applications and Problem Solving

• Prevents oil leaks from the drive axle shaft area
• Protects axle bearings from dirt and debris intrusion
• Maintains proper lubrication within the axle assembly
• Reduces risk of driveline component wear due to contamination
• Ensures consistent performance in Ford Excursion and Super Duty trucks

Installation Notes and Tips

• Verify the part number 710494 matches your vehicle’s specifications before installation
• Clean the axle shaft and housing bore thoroughly to remove old sealant and debris
• Use appropriate tools to press the seal evenly into the housing bore without damage
• Inspect the seal lip for any nicks or deformities prior to installation
• Apply a light coating of compatible lubricant on the seal lip to ease installation and improve sealing

Quality Assurance and Warranty

National drive axle shaft seals are manufactured to meet OEM standards for fit, form, and function. The 710494 seal undergoes rigorous quality control to ensure durability and reliable sealing performance. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product longevity and performance.