Now, this step is crucial. The bottom clamp is heavier that it looks. You'll want to support it with one hand while you take off the ring nut with the other. If you are just going to grease your existing ball bearings, I'd advise to place a box or cart underneath the front head tube because you will lose a couple ball bearings. If you are replacing the ball bearings with roller bearings, then let the old bearings roll where they want! (steering stem already removed in this picture)
And this is what slides down and out of the head tube.
This is what the top of the head tube looks like. You'll reuse the ring nut and the cup shaped washer thing underneath it.
Underneath the cupped washer is another washer and under that are the bearings laying in their race.
Now, take a chisel and gently tap off the lower race thats stuck on the bottom clamp. Take your time, it will come off. Work your way around it.
It will eventually come up and you can slide of off but keep it, we'll use it in a little bit.
Now, we need to remove the old races in the head tube. I had a bar laying around that I used. Its about a foot long which is almost too long, but it worked fine. Put in in from the top and lightly catch a side of the old race. Work your way around the race while lightly tapping with a hammer.
This is what will come out.