National 710104 Wheel Seal - Rear Outer

Wheel Seal for Heavy-Duty Driveline Service

National 710104 is a wheel seal built for rear outer applications on select UD trucks. It uses nitrile sealing material and metric dimensions to match the specified housing bore, shaft, and width requirements.

• Fits rear outer wheel seal applications on select UD 1800, 1800CS, 1800HD, 2000, 2300DH, and 2300LP models.
• Nitrile construction helps maintain sealing performance in driveline and axle service.
• Metric sizing supports accurate replacement where bore, shaft, and width dimensions must match.
• Part number 710104 is a direct reference for ordering and catalog lookup.

Detailed Fitment and Design

National 710104 is an oil seal/wheel seal for rear outer use in driveline and axle sealing systems. The seal measures 2.244 inches inside diameter, 4.854 inches outside diameter, and 0.827 inches overall width with side lip, with a 4.843-inch housing bore. These dimensions make it a fitment-specific replacement for UD 1800, UD 2000, and UD 2300-series trucks where the original seal dimensions must be matched closely. Part number 710104 also cross-references Monroe Shocks & Struts (e.g., 38212-Z5007, NA5401) for the same application.

Common Replacement Uses

• Oil seepage at the wheel end
• Contamination entering the hub or axle area
• Seal wear from age, heat, or mileage
• Loss of sealing integrity during axle service

Installation Notes and Tips

Verify the housing bore, shaft diameter, and seal width before installation. Clean the sealing surfaces thoroughly and inspect the hub and axle components for wear or scoring that could affect seal life. Confirm rear outer placement and compare the removed seal to National 710104 before assembly.

Quality Assurance

National has supplied sealing solutions for more than 75 years and is known for engineering products for modern vehicle applications. The 710104 is part of the brand's sealing lineup for driveline and axle service.