National 493637 Wheel Seal - Front Inner

National 493637 Wheel Seal for Front Inner Applications

National 493637 is a wheel seal built for front inner service on select Ford and Jeep applications. It uses nitrile sealing material and Redi-Coat treatment to support a reliable seal at the hub, helping maintain proper lubrication and keep contaminants out.

Key Features

• Wheel seal / oil seal for driveline and axle sealing applications
• Nitrile construction for sealing performance in demanding wheel-end environments
• Redi-Coat finish for easier sealing surface engagement
• 3.001 in. outside diameter and 2.330 in. shaft diameter
• 0.312 in. width for the specified hub and housing dimensions
• Fits housing bore of 2.997 in. and 76.120 mm
• National 493637 is part of the 490000 series

Detailed Description

National 493637 is a front inner wheel seal engineered around precise dimensional requirements: 2.330 in. inside diameter, 3.001 in. outside diameter, and 0.312 in. width. The nitrile sealing element and Redi-Coat surface treatment support consistent contact at the wheel end, while the 76.120 mm housing bore specification helps confirm proper fit during service. This seal is listed as an oil seal in the National 490000 series and is a direct-fit option for applications such as Ford E-250 Econoline, Ford E-350 Econoline, Ford F-250, Ford F-350, Jeep CJ7, and Jeep Scrambler in the front inner position. This part cross-references Gates 23300 for the same application.

Common Repair Uses

• Replacing a leaking front inner wheel seal
• Restoring axle-end sealing on Ford E-250 Econoline and E-350 Econoline service
• Addressing grease or lubricant seepage at the hub area on Ford F-250 and F-350 models
• Servicing front inner seal wear on Jeep CJ7 and Jeep Scrambler applications
• Correcting contamination entry at the wheel-end sealing surface

Installation Notes and Tips

Verify shaft diameter, housing bore, outside diameter, and width before installation. Clean the hub and sealing surface thoroughly, inspect for scoring or wear, and confirm the seal seats squarely in the bore. For fitment reference, National 493637 fits 1984-1986 Jeep CJ7, front inner; 1984-1985 Jeep Scrambler, front inner; 1981 Ford E-250 Econoline and E-250 Econoline Club Wagon, front inner; 1981 Ford E-350 Econoline and E-350 Econoline Club Wagon, front inner; 1975-1980 Ford E-250 Econoline and E-250 Econoline Club Wagon, front inner; 1975-1980 Ford E-350 Econoline, front inner; 1977-1980 Ford E-350 Econoline Club Wagon, front inner; 1976-1979 Ford F-250, front inner with Heavy Duty Brakes; 1976-1979 Ford F-350, front inner; 1975 Ford F-250, front inner with Heavy Duty Brakes; and 1975 Ford F-350, front inner.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for current and legacy vehicle service needs. National 493637 reflects that focus on dimensional accuracy and sealing performance for wheel-end repair.