[Farmall] Crank Bearing Repair

[olmstead at ridgenet.net]

Beautiful job, Chris!   Very well done, stronger than original, and it
uses as much of the original tractor part as you could manage.  Fine
photography also.  I haven't done anything more with the broken O-12
parts.  Every crank I examined, about ten of 'em, was broken in the same
place.  I have three or four piled up waiting my attention.  I am
concerned that they might not come out as strong as what you did on the
10-20 crank bearing, because I would be welding two ears onto the cast
body, not surrounding it as you did.  As you know, mounting ears on O-12
hand crank bearing are perpendicular to crank, not parallel as on 10-20.

-Karl

>
>   A while back I mentioned repairing the type of hand crank bearing for
> the 10-20, 15-30, or the tractractors.  I took a few pictures of the
> process.  The first part is turning the bearing down to about 2 1/4".
> That usually removes most of the break and does not cut in to the grease
> passage. http://home.att.net/~klossner/crank1.jpg This one did not quite
> clean up but what is missing will be filled with weld. The next part is
> to cut out the replacement flange.  I flame cut the plate it does
> require a little more grinding but I think it is still faster than with
> the band saw. http://home.att.net/~klossner/crank2.jpg  Once that is
> ground to shape find the center and drill to match the casting.  I use a
> hole saw little easier on things removing that much material and it does
> not have to be a precise fit. http://home.att.net/~klossner/crank3.jpg
> The grease fitting boss helps line the parts up for welding.
> http://home.att.net/~klossner/crank4.jpg  The part can be welded or
> brazed.  I welded this one since it had more to fill in from the
> original break.  Preheating is a little more forgiving since the
> replacement flange is mild steel. It is still enough heat to crystallize
> the old grease.  http://home.att.net/~klossner/crank5.jpg
> http://home.att.net/~klossner/crank6.jpg  To center punch the mounting
> holes I clamp it to the tractor with the crank in place so every thing
> lines up.
>
>   Chris Klossner
>  http://home.att.net/~klossner/