Originally Posted by f1100turbo
never heard of bearing "slack"
wheel bearing "play" is the bearing not tight enough .
when jacked up take the wheel and try to rock it back and forth from side to side .
although it should move just a itsy bit noticeable rocking is not good
Slack, play, makes no difference to me what you want to call it.
But your description of checking it is reasonable.
If it is too slack, there is a crown nut on the axle stub that is held in place by a cotter pin. Remove the pin, and turn the nut in until the slack is removed, then reinstall the cotter pin.
There should be just the slightest bit off movement as you rock the hub back and forth.
It is a fairly easy job, and I have done it hundreds of times, but it still may spook the novice, as it is important to do it right.
Considering how seldom it needs to be done, you might want to pay the price.