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Cylinder material for fin repair

PostPosted: Mon Jul 15, 2019 9:03 pm
by billc
Can someone please tell me what material the cylinders are made of ? I need to do some fin repair. Thanks.

Re: Cylinder material for fin repair

PostPosted: Mon Jul 15, 2019 9:55 pm
by Mutt
just plain old gray cast iron. I use plain ol' cold roll steel to repair fins

Re: Cylinder material for fin repair

PostPosted: Mon Jul 15, 2019 10:11 pm
by billc
do you braze, tig or arc weld your repairs ? i'm repairing the top fin so access isn't a problem.

Re: Cylinder material for fin repair

PostPosted: Tue Jul 16, 2019 12:09 am
by bobscogin
billc wrote:do you braze, tig or arc weld your repairs ? i'm repairing the top fin so access isn't a problem.


I just cut the repair piece out of 1/8 thick hot rolled sheet and braze it. Pre-heat a little and focus the heat on the cylinder since the brass often prefers to run to the carbon steel. Not the prettiest job you'll ever see but ok for an amateur.

Bob

Re: Cylinder material for fin repair

PostPosted: Tue Jul 16, 2019 12:53 am
by billc
thanks guys.

Re: Cylinder material for fin repair

PostPosted: Sun Jul 21, 2019 10:25 pm
by billc
I figure if Bob can do it so can I :-) . Got this 165 cylinder off fleabay for $39 . It had some broken fins and needed a bore job ( .030 ) . I have a boring machine but never fixed fins before. I ain't a'skeered of fin repair no more. Piece of cake :-) Still need to do the other side blend them in but I'm pleased for my first effort.

Re: Cylinder material for fin repair

PostPosted: Sun Jul 21, 2019 10:27 pm
by billc
gettin there

Re: Cylinder material for fin repair

PostPosted: Mon Jul 22, 2019 7:29 am
by Mutt
Looking good Bill

Re: Cylinder material for fin repair

PostPosted: Wed Jul 24, 2019 8:29 pm
by billc
Got the cylinder bored and the fins done . I still have to build and install the crank but I couldn't resist a little mock up to see how it looks. Put some spit shine on the side covers too :-)

Re: Cylinder material for fin repair

PostPosted: Wed Jul 24, 2019 9:04 pm
by bobscogin
Looks good!

Bob