It doesn't hurt to take the hub apart, clean and repack the bearings. I used to do this once a year when I was racing and rode a lot. A pair of flat wrenches is all you need. Each side has the cone adjustment and a nut that backs into the cone. Only take one side apart so you don't have to re-center the axle. Don't use lithium, use bearing grease made for bicycles. It has the correct viscosity.Just wondering if I should open and repack the bearings and if a special tool is required for front wheels... or just a pair of flat wrenches and what grease is best, high speed type bearing, white lithium , etc.
It depends on the type of hub that you have but mainly you tighten the cones until there is no play left and then tighten the outer nuts. I always snugged down a tiny bit, loosened and then did the final adjustment.I believe there may be a cone tool or free wheel tool required for rear, or do I just gently tighten the inner nuts with a flat wrench and deep socket until the play is gone