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Misc Forums => How To Section => Topic started by: John Burk on February 11, 2022, 07:38:07 PM

Title: Cast iron repair
Post by: John Burk on February 11, 2022, 07:38:07 PM: 29 minute video . Good series . Not an ad .

https://youtu.be/zgv9gAXssgM
Title: Re: Cast iron repair
Post by: kiwi belly tank on February 12, 2022, 02:05:27 AM: Funny you should post that, I just watched it today while having lunch.
Sid.
Title: Re: Cast iron repair
Post by: donpearsall on February 12, 2022, 12:42:10 PM: 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
Title: Re: Cast iron repair
Post by: floydjer on February 12, 2022, 02:01:28 PM: I repaired a cracked bell from a friend's centennial farm a few years ago. Once was enough .
Title: Re: Cast iron repair
Post by: panic on February 12, 2022, 03:00:45 PM: 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.
Title: Re: Cast iron repair
Post by: bearingburner on February 12, 2022, 06:04:00 PM: 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.
Title: Re: Cast iron repair
Post by: manta22 on February 12, 2022, 07:35:13 PM: Pre-heating cast iron and then braze welding works very well.
Title: Re: Cast iron repair
Post by: kiwi belly tank on February 12, 2022, 10:34:16 PM: 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.
Title: Re: Cast iron repair
Post by: WOODY@DDLLC on February 13, 2022, 08:53:40 AM: Quote from: manta22 on February 12, 2022, 07:35:13 PM
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 lol8
Title: Re: Cast iron repair
Post by: floydjer on February 13, 2022, 11:44:43 AM: 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.
Title: Re: Cast iron repair
Post by: jimmy six on February 13, 2022, 01:45:18 PM: Send your cast iron parts to Pakistan... those guys can fix anything :cheers: lol8
Title: Re: Cast iron repair
Post by: mtiberio on February 15, 2022, 07:22:18 AM: Quote from: jimmy six on February 13, 2022, 01:45:18 PM
Send your cast iron parts to Pakistan... those guys can fix anything :cheers: lol8

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...
Title: Re: Cast iron repair
Post by: floydjer on April 24, 2022, 09:14:39 AM: The Pakistani gas welding damaged aluminum wheels using hand poured filler rod is inspirational as well.