[Farmall] O-12 parts

[Mark Peters]

Hi Karl,    One thing to keep in mind with any type of sand casting is the need for draft and ,no ,I`m not talking about having a beer! Patterns are typically built with about 1 degree draft so that the sand mold can be drawn off from the pattern or vice versa. So a guy has to be a little careful to not have backdraft on your pattern or you wont get it out of the mold cleanly. Mark 
  Been awhile since I`ve been called Sneaky. Didn`t think anyone on here remembered  me  being called that other than Mike and Guy! It`s good to be on here again.
---- olmstead at ridgenet.net wrote: 
> Sneaky, good to hear from you again!  Your mention of sheet wax got me to
> thinking.  If a part could be dip-coated with something, that would be
> enormously easier than building up the surface with Bondo.
> 
> I'll take another look, but my first impression was that the air passages
> in the air cleaner top would require cores.  Both the inlet and outlet
> passages are in the casting.
> 
> Guy was successful in sending me the drawing of the front engine mount
> bracket.  It is a very pretty, but intimidating casting!
> 
> Lane, I like bronze for machining (except hole drilling).  I just hate the
> idea of 'dubbing' a bit so that it won't get sucked into the bronze.  I've
> done a lot of re-bushing (using bronze) of steering parts on my main O-12
> project in the past year or two.  The steering is going to end up better
> and tighter than new!  Finished the steering gearbox a couple of months
> ago.
> 
> As my property development projects wind down, I'm gradually finding more
> time for tractor restoration.
> 
> -Karl
> 
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