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Case Tractors Discussion Forum
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Crack in block

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Haymaker

01-29-2005 21:01:06




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I have a Case 930 that has a crack in the block and leaks water, jb weld does not hold. If I weld it could the heat make the crack spread. I have never welded on a block, any thoughts and advice would be greatly appreciated.




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Illini Case

02-02-2005 07:00:42




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
I had a 10" crack in my case 430 (4 cyl gas)block from a freezing incident during shipment. After much study I drilled out both ends of the crack to stop spreading. I then die grinded a good vee along the crack. I blocked the tractor up on one side to get it as horizontal as I safely could. I Preheated and used a good nickel rod -only 1/2" at a time (move around and weld stictch it). I then ground off the excess weld. I had slight seepage from weld pits so I JB welded it for looks. With a little paint you could not tell or feel that it was done. For a little extra precaution I put in a bottle of block sealer. That was 2 years ago..still going strong.

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Roger (Mi)

01-31-2005 19:43:30




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
Had great luck using nickel rod on a TD14 block. V out the crack with a die grinder. Preheat the area to be welded with a torch. Electric weld with nickel rod, but only one inch at a time. After welding one inch, peen the weld for at least one minute to relieve stress, then weld the next inch. Repeat the process of peening until the total crack is welded. When done welding, grind off excess weld and use JB weld for any pin holes. If done properly, it will be difficult to tell the block was even welded.

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Dennis/Ohio

01-31-2005 03:51:00




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
Hi,
I"ve seen "Aluma seal" brand radiator sealer seal block cracks. It won"t plug up the cooling system. It only hardens at the leak. I didn"t believe it either untill I saw it. You must have a good radiator cap because you need the heat and operating pressure to seal it.
Best wishes, Dennis..... ..



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Lincoln

01-30-2005 17:23:53




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
I think I saw a reapair done one time where they drilled holes in each end of the crack and welded some pins in to stop the crack from spreading.



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CNESLER

01-30-2005 13:21:28




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
I would V out crack preheat then braze.
The block is cracked already what do you have
to loose by tring?
Good Luck
CNESLER



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nb

01-30-2005 09:32:36




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
You could look into stitching the crack. We have had a few heads stitched and it works great. It is a little more expensive. Also, you can't stitch where you have already welded,(it doesn't matter with J.B. weld) so if you are interested, you should check that out with a machine shop first.



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JIm M

01-30-2005 03:53:42




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 Re: Crack in block in reply to Haymaker, 01-29-2005 21:01:06  
My dad has a 930 with a block that he welded up and then j/b welded over to seal. The area needs to be cleaned well. V out the crack. Preheat the block. Use a good nickel rod. One mistake we made was we did not drain all the water out of the block. You could drill a hole at the end of the crack and the weld to seal it to stop the crack.



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