National

National wheel seals for heavy-duty axles: six listings covering steer, drive and trailer positions.

• Steer: 370001A, and 370048A for 16,000 lb Mack steer axles
• Drive: 370003A and 370022A
• Trailer: 370025A and 370065A

A wheel seal is specific to the axle and hub, so the reliable way to match one is the number molded or printed on the old seal, or the axle model and wheel position. RevHD wheel seals are grouped under wheel end and RevHD; for example, RevHD R1-D02 is listed as a replacement for National 370003A. We also list Stemco 393-0173 and 372-7099 as replacements for National 370003A and 370065A. Check the bearings and races while the hub is off; bearing and race sets are listed separately.