Cast iron repair

[John Burk]

29 minute video . Good series . Not an ad .

https://youtu.be/zgv9gAXssgM

[kiwi belly tank]

Funny you should post that, I just watched it today while having lunch.
  Sid.

[donpearsall]

The video was interesting. I did notice that the welder kept complaining how hard cast iron was to weld because of contaminants, and then did not even bother to remove the paint from the area he was welding.

Don

[floydjer]

I repaired a cracked bell from a friend's centennial farm a few years ago. Once was enough .

[panic]

It helps having an oven big enough for pre- and post-weld temperature control, the longer-&-slower the better.
Even a well-insulated box (old refrigerator?) is better than air cooling.

[bearingburner]

When I was a Maintenance Manager we had a large cast iron hydraulic cylinder which had a mount broken. We sent it out to a facility witb a LARGE oven
and the welder got in the oven to do the welding. Cylinder must have been 10' long. They pre heated the cylinder for 24 hrs and then cooled it in the oven for another 24 hrs.

[manta22]

Pre-heating cast iron and then braze welding works very well.

[kiwi belly tank]

The last road grader split trans case I repaired was with it still in the machine I welded it with a Blue Max 2100 rod. I bolted a 1/2" girdle plate to the outside then welded the housing to the plate from the inside. Not pretty but it's been working 6yrs since then.
  Sid.

[WOODY@DDLLC]

Pre-heating cast iron and then braze welding works very well.

That will keep you from chasing the crack! Don't ask me how I know!  :-P

[floydjer]

My plan for the bell was to tig braze the crack until the old geezers on Shopfloortalk.com offered the bell would not "ring true". So...Pre heat with a rosebud, pass the torch to my right hand girl to maintain heat and stitch weld with stainless wire and gentle peening. Sounds O.K. Hasn't cracked.

[jimmy six]

Send your cast iron parts to Pakistan... those guys can fix anything

[mtiberio]

Send your cast iron parts to Pakistan... those guys can fix anything

Oh god. I saw a video where the Paki mechanics on a dirt floor garage built up a broken ring gear tooth with a stick welder. "Lapped" it in with a die grinder... I wonder how long that lasted...

[floydjer]

The Pakistani gas welding damaged aluminum wheels using hand poured filler rod is inspirational as well.