Stihl 066 clutch

[Jemclimber]

The clutch hub on my 66, the part that the clutch engages, has separated the outer part from the inner gear that the sprocket slips over.  When it happened I thought  the clutch broke.  It appears the 2 parts are soldered, so I sanded the old solder off and cleaned it well. 
My question, is this normal solder or something else? Can I resolder these back together using an acetylene torch without ruining the parts?  I tried with propane and the mass is too big to get enough heat into the part to draw the solder in. 

[beenthere]

Sponsor chainsawr might have that part.  just sayin...  ;)

[sablatnic]

I have done it, with success, using brass for solder and borax as flux. (That is how they do it at the factory).

[Jemclimber]

Thanks to both.   If the part gets too hot with acetylene it will shrink as it cools and no longer fit over the bearing so a new part procurement is in order.   >:(     
Just saying....      (new saying)    ;D

Chainsawr had one and it's been ordered.

[sablatnic]

It shrank?!? Maybe mine did too. I had to polish the bore with some emery cloth on a cotter pin.