Stopped at several different shops today in search of a spare hub or at least spare seals.
I don't want to travel with just the active hubs, seals and bearings, I want spares.
The bearings seem to be pretty common, no problem getting a set of them.
The seal is another thing. An RV shop looked at my hub and said they didn't have anything that small. He suggested a nearby shop that specializes in bearings.
Took the hub there and he said the seal would have to be removed before he could see if they had a replacement.
There's my Catch 22. right now the seal is in place and working as it should. If I take it out i'll wreck it and maybe they can't replace it.
I'll go from two functioning hubs to one and that ain't good!
The power was out at the bearing place and they probably couldn't see these numbers I found later after scraping off some deposits.
Here's close-up photos of the letters NOK and numbers. Looks like 8998 or 8668, depending on its orientation.
I did find a spare hub all lubed and ready for $35 but the fellow there thought that on my older trailer I might have a "short" hub so his wouldn't fit.
He might be wrong though. I didn't bring the hub with me to that shop. On my hub it looks like the back projection is shorter than the front projection. On his hub they were of equal length. But that's something of an optical illusion I think. I measured his from front to back with a tape measurer through the center hole and came up with a depth of 4-1/4".
I had earlier measured mine at 4" but hadn't put the tape through the inner part so my measurement wasn't too accurate. I put a thin tape thru mine tonight and it seems to be 4-1/4" too.
Looking on line I see some "short" hubs that were 3-1/2", clearly much shorter than mine.
Tomorrow i'll take my hub back there in person. Perhaps buy one of their's it they'll take it back if it doesn't fit. they're pretty good about that, it's a marine store.
He suggested I buy a used axle
from him with standard hubs for $129. I'm pretty ham handed, bearings are a struggle, can't even think about another axle though looking under the trailer it did seem pretty simple, just a pair of u-bolts holding it on to the springs.