On every tapered wheel bearing I've worked on you can lock the bearings by
tightening. That is the normal adjustment, tighten and then back off
slightly. Is the hub nut bottoming out on the threads? Perhaps the washer
between the nut and the bearing is missing? If not I would try an extra
washer.

"New2Boating" wrote in message
ups.com...
Hi there. I am new to boating, having just bought a 14 foot day boat
and trailer last weekend. I have been checking over the trailer and I
dismantled the wheel bearings to check them. They are a pair of tapered
roller bearings, fitted to a hub with 'HG 505' marked on it. The thing
is, the hub has about 2mm slack when I tighten the hub nut fully. I
would have thought that there would be less play. Is the hub assembly
worn?
Any ideas on this would be much appreciated.

Thanks Davy M.