Changing out the seal on oil bath hubs - PlanetNautique Forums

02 Jul.,2024

 

Changing out the seal on oil bath hubs - PlanetNautique Forums

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  • Switching oil bath hubs to grease

    You might want to try a better quality seal, Dexter 10k oil bath seal National part # A. There are only 2 choices at trailer part stores, the red seal (metal back) or black seal (rubber back). The rubber-back seal is made in Taiwan and it will spin on its back once the rubber deteriorates causing a complete loss of oil pretty quickly. The red seal is made in China it won't spin on its back and it leaks slowly once it's gone bad. Nowadays it's hard to get good quality parts everyone tries to make the cheapest crap it's a race to the bottom, no one is stocking good quality parts anymore you might have to go online to get good quality parts. I use eBay or rockauto.com exclusively if I can wait for the parts.
    When installing the seal use a shop press so that the seal is perfectly flat against the hub, you might also want to use anaerobic sealant on the seal's back to prevent leak (out the back of the seal) and definitely use anaerobic sealant if the seal has rubber back. Also fill the oil til the line 'oil level' and no more, change the rubber plug at center of the oil cap if the rubber has harden there is a cut center of the plug to allow the hub to 'breathe'.
    The National-Mogul seal part # A is made in Mexico.

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