Headstock bearings

I have a MK3 I put in freezer then pulled both bearings into headstock with a length of studding, nuts,and washers and the old bearings.

You need to make sure thay start square.

If you have the old type cups and cones you need to warm the cone for the bottom yoke and cool the yoke stem then tap down, use tube and a press.

Est-il utile de mettre les nouveaux dans le congÃ?lateur pendant la nuit?

Oui, il est une trÃ?s bonne idÃ?e pour ELCA roulement

(Is it worth putting the new ones in the freezer overnight?Yes it is a very good idea for rolling ELCA)

Taper roller ones work nicely too ð

I have just managed to extract the headstock bearings from my 72 Roadster with great difficulty.

Reuse or replace ? - See photo ðð

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Previously richard_tool wrote:

I have just managed to extract the headstock bearings from my 72 Roadster with great difficulty.

Reuse or replace ? - See photo ðð

After 46 years I think it deserves some new ones. I do not even think new grease and super glue will help them. Well done for getting them out.

6205 2RS, get some decent quality ones and they will still be cheap.

Just about to do the same, had terrible trouble getting the old ones out.

Found suitable size drift and plan to knock the new ones into place, will heat the head stock and freeze the bearings.

Still waiting for the frame to come back, pulling them into place sounds better than a hammer.

Did you heat the head stock and freeze the bearings and did it take long to wind them into positjon?

I just know the bottom oneis going to be a problem, it was dreadful to get out.

I've always used a large socket to act as a drift to tap bearings in gently. Choose one or buy one specially to fit against the outer race and within the housing. If an extension bar is also used, it's that much easier to keep them straight, and there's no risk of damaging the races.

I know some people freeze the bearing, but I've never believed it helps much. The job always takes me at least enough time for everything to come to the same temperature. And with crank cases, it's mostly the difference in expansion rates between steel and alloy that allows the bearing to fit when it's all hot, not the difference in temperature.

Many thanks.