job is quite easy to do. it doesn`t need much of technical knowledge. just basic stuff will do.

having a little play on bearing is NOT a fault. when you have much play, then it is a fault. when it makes noise, it must be renewed.

if there is a fault on bearing, it need to be removed. even if bearing could be tightened so that there is basicly no play, it will only help for a short time. so the smart move is to replace it rather than try to tighten it.