You have to keep going and get that bottom outer race out when you have done that clean all the damage up with the dremel grinding wheel making sure none of the damage is proud of the original finish, dress the stem up with a file again just enough to make it flush or just below the original finish.Mmm.. Ok. I may consider that approach. I never intended to change the head bearings but as I had to replace the bent lower yoke i was forced into this nightmare
You have to keep going and get that bottom outer race out when you have done that clean all the damage up with the dremel grinding wheel making sure none of the damage is proud of the original finish, dress the stem up with a file again just enough to make it flush or just below the original finish.
Ideally you need a drift for the outer races that is a few thou smaller than the OD I used a socket spanner then freeze the race and warm the headstock with a heatgun run some high temp grease around the housing then tap the race in. You could also pull the races in from each end by rigging something up using threaded bar.
To put the inner race on the stem all you need to do is boil it in oil it will simply fall on having gained size while hot, all you need do is have something handy to make sure it is sat right down to the yoke I used a long tube spanner that happened to be the right size it was a clearance fit over the stem and long enough to stand above the top of it so I could tap/seat the race down you need to be quick as the race will cool and tighten almost instantly, its best to have the yoke/stem held in a vice so it won't move The hardest part about it is not getting burnt while doing the job
well, i cut loads of deep grooves in the inner race (on the stem) and hit it with a hammer and chisel and it took forever to come apart, hence i kept having to cut more grooves, and more grooves...and more hitting...and more grooves. it really felt like it was seized on there after 18 years.
well, the lower race in the headstock is out
and this is what is left
i thought all of the silver bit was the race, hence the mess...
Well its certainly not the neatest of extractions but its all salvageable just make sure non of the damage is proud of the original machining finish.
Make sure when you offer the new races in that they stay dead straight with the housing if you don't you will knacker the race and the housing.