Peter S
Diamond
- Joined
- May 6, 2002
- Location
- Auckland, New Zealand
I'm looking for ideas for the repair of an old (1960's?) MacCulloch 380 chainsaw, the clutch seats on a taper on the end of the crankshaft, there is a woodruff key to take the drive. Unfortunately, a chunk of metal has broken out behind the key. The shaft is hard, and seems to be through-hardened as well.
The saw is not worth spending money on, but I would still like to repair it, I can spend time on it, but not $.
Any ideas for a repair? I don't want to remove the crankshaft either, if at all possible!
Strangely enough, I have just come across an article on woodruff key seat repairs, where the author recommends making a disc of carbon to fit where the key used to go, (the carbon will conduct electricity if arc welding, but won't burn away), heat to white/yellow and gas weld. Also says you can MIG weld after preheat, but says arc weld will give slag and distortion problems. Any comments on this?
What sort of filler should I use if I gas weld?
Thanks for any advise,
Peter
The saw is not worth spending money on, but I would still like to repair it, I can spend time on it, but not $.
Any ideas for a repair? I don't want to remove the crankshaft either, if at all possible!
Strangely enough, I have just come across an article on woodruff key seat repairs, where the author recommends making a disc of carbon to fit where the key used to go, (the carbon will conduct electricity if arc welding, but won't burn away), heat to white/yellow and gas weld. Also says you can MIG weld after preheat, but says arc weld will give slag and distortion problems. Any comments on this?
What sort of filler should I use if I gas weld?
Thanks for any advise,
Peter