Originally Posted by wfmdfm
All the bearings were checked and lubed in the fall anticipating this spring trip.
I'd make damn sure the tech who worked on that trailer properly checked and installed those bearings. Some mechanics don't know how (or don't bother) to properly set the preload on tapered wheel bearings. It requires a torque wrench usually set to 50 foot pounds to seat the bearings.
Now before all you DIYers out there call BS, "you just crank 'er down hand tight with a 12" wrench" remember, I'm talking about folks who charge other people
to do this job. Working on someone else's wheels and putting their lives in your hands is a whole 'nother thing. What if the OP or a family member had been injured or killed and the subsequent investigation found the improperly installed bearings were at fault? You want to be the guy with the grease on his fingers? So ...
1) Tighten castellated nut to 50 foot-lbs. while rotating wheel
2) Back off nut, do not
3) Retighten nut finger tight, do not
4) Back off nut to first spot to bend tang or insert cotter pin
5) The nut should be free to move
, retained only by bent tang or cotter
If not done properly, bearings will expand, overheat, melt grease, seize, score spindle and finally disintegrate.