National 710865 Drive Axle Shaft Seal - Front Inner

Overview of National Drive Axle Shaft Seal 710865

The National Drive Axle Shaft Seal 710865 is engineered for reliable sealing performance in Ford Excursion, F-250 Super Duty, and F-350 Super Duty models. Designed with durable polyacrylate material and a bi-directional lip design, this oil seal helps maintain driveline integrity under demanding conditions.

• Material: Polyacrylate for enhanced durability and resistance
• Inside Diameter: 1.575 inches (40.000 mm)
• Outside Diameter: 2.626 inches (66.700 mm)
• Thickness: 0.748 inches (19.000 mm)
• Bi-directional helix lip design for effective sealing
• Housing Bore: 2.618 inches (66.500 mm)
• Overall Width with Side Lip: 0.827 inches (21.000 mm)

Detailed Product Description

The National 710865 drive axle shaft seal is specifically designed to fit Ford Excursion, F-250 Super Duty, and F-350 Super Duty vehicles. Constructed from polyacrylate, this seal offers excellent resistance to heat, oil, and wear, ensuring long service life. The bi-directional lip design provides a secure seal around the axle shaft, preventing oil leaks and contamination ingress. With precise dimensions including a 1.575-inch inside diameter and a 2.626-inch outside diameter, this seal fits tightly within the housing bore of 2.618 inches, maintaining optimal sealing performance.

Common Applications and Problem Solving

• Prevents oil leaks from the drive axle shaft area
• Protects driveline components from dirt and debris contamination
• Reduces wear on axle shaft bearings by maintaining lubrication
• Helps maintain proper axle shaft alignment and function
• Addresses seal failure issues in Ford Excursion and Super Duty trucks

Installation Notes and Tips

• Ensure the housing bore and shaft surfaces are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without damage
• Verify the seal’s orientation matches the bi-directional lip design for correct sealing
• Inspect the axle shaft for wear or damage prior to seal installation
• Follow vehicle manufacturer torque specifications when reassembling components

Quality Assurance and Warranty

National drive axle shaft seals are manufactured to meet industry standards for durability and performance. The 710865 seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. 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.