re: Trailer Bearing/Hub question

quote:

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I agree except the plunger in the BB is constantly being sucked all of the way in. And according to their videos, this is when you add grease

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You're doing what you're supposed to, it just shouldn't be happening in the first place.

The bearing buddy has caused the inside seal to fail because the inside seal likely wasn't designed for use with bearing buddies and the pressure they create. Either that or it was filled with too much grease, it wasn't cleaned well, or it's just the wrong size.

The entire point of BBs is they create pressure, via the plunger, inside the hub so that water can't enter. A hub that's hot from riding will be quenched when you back it into the water, inducing a vacuum and sucking the water into the hub to ruin the grease and eventually your bearings. The pressure exerted by the BB prevents this. If the inside seal is leaking badly, and the plunger is all the way down, it's doing no good and water is gonna come in. That said, if the leak isn't that bad and the plunger remains compressed even after driving, the BB is still doing it's job even with a little grease seeping from the inside seal. In fact this acts as a half arse purge for the spent grease, assuming your zerk is on the outside and you keep it topped off.

Like I said earlier, a leaking inside seal isn't the end of the world, but you need to have a trailer shop look at it and come up with a permanent solution you won't have to baby.