king pins and tie rod ends can be re-used if they're still good but atleast for tie rod ends everything has to be assembled to check them out kings pins i'm not fimiliar with just yet. As for the wheel bearings clean them out real good with a good solovent and blow dry them off (DO NOT ALLOW BEARING TO SPIN WHEN BLOW DRYING IT, the bearing might explode) then just hold the wheel bearing and rotate it slowly and play close attention to how smooth it rolls, then look at each roller carefully to make sure there is no pitting or spauling (metal flakes off) and you'll want to look at the inner part of the wheel bearing, hold it up to a light with the wider end facing you and look between two rollers at the inner part of the bearing and slowly rotate the inner part of the bearing (this is where a good cleaning counts) as for the races, clean out the hub real good and check the races over check for the same stuff as you would a bearing pitting, spauling, and just run your finger over it for smoothness, if you replace a bearing you have to replace the race also, and for the wheel seals usually each time you take the hub off its a good idea to replace the seal cause most of the time it gets damage when you take the hub off unless your careful and the seal is realativly new, otherwise old seal just replace it, cause if it leaks then you have gease all over your breaks
Nate
