use your wd40 to resolve the grease and to clean the raw bearings - you'll see whot i mean with the dissolvant nature of wd40. lubricate with a good load of grease, i use too much but love when it bleeds out the grease as in nothing gets in type of thing.
don't worry if the bearings don't run freely afterwards, they are not supposed to. they will run smooth under load.
repack cartridge bearings - long version
use your wd40 to resolve the grease and to clean the raw bearings - you'll see whot i mean with the dissolvant nature of wd40. lubricate with a good load of grease, i use too much but love when it bleeds out the grease as in nothing gets in type of thing.
don't worry if the bearings don't run freely afterwards, they are not supposed to. they will run smooth under load.