I have been tearing down my original engine to replace the crankcase after a chain mishap destroyed my alternator cover and broke the case. I have the cases in two, only the crank remaining with the primary transmission gear still on. According to the manual, "remove the gear using an extractor," (seems to be a simple gear puller) "and inserting an aluminum pad between the crankshaft and extractor screw." I have done this and using an immense amount of torque it will not budge.
Is there some kind of locking device, a key, or something I am missing? I also need to remove the timing control pulleys but do not have the tool, anyone know a way around this? Thanks
Well it is and a few light taps freed the crank from the housing, and all the ball bearings on the lower side. After panicking to try to save them all, then removing the remaining, I now have a loose crankshaft rod through the hole with a stubborn gear still attached! 
I have found a new set of cases, they seem to match nicely with the old set. Any thoughts on simply using one old with one new? I know, I know pretty weak idea, but everything internally is fine, only destroyed the alt cover and the right case when the chain/gear failed. I can provide pics or you can see them on facebook under "dennisofthebeach". Thanks again!
They will turn about 3/4 of a turn at the case but are totally frozen together at the connecters. Because they are 90 degree elbows, they cannot turn a full 360 degrees to unscrew from the block. This is one item I have not been able to locate a replacement for.