Removal of welded housing.

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Bosunmate2
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Removal of welded housing.

Postby Bosunmate2 » Tue Jul 31, 2018 9:10 pm

As you can see I need to remove the final drive housing that was welded to the transmission case from a prior owner. Bearings are bad in the drive. I have a donor case and drive but need to use the parts in the drive . What is the best way to remove the housing without damaging the shafts? Any help would be appreciated before I butcher it. I have plenty of time and patience but no experience in dealing with this.
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Re: Removal of welded housing.

Postby tst » Tue Jul 31, 2018 9:22 pm

that's a nice mess, cast iron is pretty brittle, I would think a Big Ball Peen Hammer would bust the cast iron open easily

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Re: Removal of welded housing.

Postby Cubfriend » Tue Jul 31, 2018 11:00 pm

Everything behind the torque tube would be an easier swap. Some are around probably reasonable.
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Re: Removal of welded housing.

Postby Crimson Tim » Wed Aug 01, 2018 12:46 am

There might be quicker ways to do it, but I would probably line up another hoist to support the final drive, buy a couple packs of discs for the angle grinder and go to town on that enormous blob of filler weld.

Since the thermal processes of welding cast have to be so carefully controlled to make it NOT crack, what if you threw some rapid thermal cycles on it? Get it as hot as you can with a torch and quench it a couple of times? Maybe you could get that seam to crack open by itself.

Other than that, just beating the crap out of it with the biggest sledge hammer you can find would probably crack it loose. As long as both the final drive and transmission case are supported, and you are already planning on replacing soft things like seals, I doubt you’ll do damage to shafts inside.

Edit: I’m not sure if there are bolts still in that mess or not. If there are, they won’t be as brittle as the cast iron, so they will probably make it a lot more difficult to get anything to crack apart. Take them out or at least loosen them first, if you can. If not, better get comfortable with the grinder.

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Re: Removal of welded housing.

Postby Rick Spivey » Wed Aug 01, 2018 5:28 am

I had a similar mess, but not as thick. Mine turned out to be "brazed", not welded. I would suspect brazing was used on yours as well, given the thickness of the repair. If so, it is easily ground off. Brazing rod is much softer than weld, being mostly brass or similar alloy. Grind on it a bit and see if it isn't a brassy color, and soft.
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Re: Removal of welded housing.

Postby Jeff Silvey » Wed Aug 01, 2018 6:21 am

That's a mess. Like Rick said grind on the welds to see if they are gold in color for bronze or silver for electric welding. Like Tim said cast iron is brittle which may be another way to remove the final. Don't hit the tranny. Its going to take time. Once you get it off & repaired you be enjoying a very nice small tractor.
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Re: Removal of welded housing.

Postby outdoors4evr » Wed Aug 01, 2018 8:08 am

This is probably the worst kind of PO fixes ever!
If you do have to break it apart, remove the bolts, grind the weld, and then start breaking on the final (far from the seam). When the final comes off, bang on the remaining pieces from the inside toward the outside and try to get it to bend or break outward using the weld like a hinge.
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Re: Removal of welded housing.

Postby Jim Becker » Wed Aug 01, 2018 9:42 am

My first thought was it was brazed and you could melt most of the material off. On further thought, get another transmission. Life isn't long enough to mess with that.

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Re: Removal of welded housing.

Postby Clownfish » Wed Aug 01, 2018 10:45 am

Here are a couple of pictures of one that I removed with a side grinder and it only took about 30 minutes and 2 or 3 disks.

IMG_0820.JPG


IMG_08211.jpg


IMG_0819.JPG

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Re: Removal of welded housing.

Postby Bosunmate2 » Wed Aug 01, 2018 7:34 pm

Thanks fir all the ideals, the pictures were worth a thousand words. I'm going to cut it off. Thanks again.

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Re: Removal of welded housing.

Postby inairam » Wed Aug 01, 2018 7:56 pm

That was some serious cowboy Sxxx by a PO.
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Re: Removal of welded housing.

Postby Crimson Tim » Thu Aug 02, 2018 5:07 pm

Rick Spivey wrote:I had a similar mess, but not as thick. Mine turned out to be "brazed", not welded. I would suspect brazing was used on yours as well, given the thickness of the repair. If so, it is easily ground off. Brazing rod is much softer than weld, being mostly brass or similar alloy. Grind on it a bit and see if it isn't a brassy color, and soft.


Really? I know you can build up material when welding, but I didn’t think you could when brazing. I certainly can’t call myself an expert, but the times I’ve done it, any extra brazing rod that I tried to melt in there just wicked into the seam and promptly dribbled out the bottom of the joint.

Clownfish wrote:Here are a couple of pictures of one that I removed with a side grinder and it only took about 30 minutes and 2 or 3 disks.


Yikes!
But there is the key bit of information. Only 30 minutes isn’t bad at all to cut through all that mess. In that case, it’s not worth fooling around with most of the other, especially unproven, ideas.
Last edited by Crimson Tim on Thu Aug 02, 2018 8:35 pm, edited 1 time in total.

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Re: Removal of welded housing.

Postby Lt.Mike » Thu Aug 02, 2018 5:50 pm

Cubfriend wrote:Everything behind the torque tube would be an easier swap. Some are around probably reasonable.

I tend to agree .
After going through all that work grinding that mess off you’ll be faced with the issue that prompted that weld “repair” in the first case. You may find yourself agreeing with the prior owner that a proper repair was not possible.
I’d abandon that mess and swap in another tranny and finals .
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Re: Removal of welded housing.

Postby Bob McCarty » Thu Aug 02, 2018 6:01 pm

I believe from his first post that he has new castings, but wants to use the internal parts.
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Re: Removal of welded housing.

Postby Lt.Mike » Thu Aug 02, 2018 6:57 pm

Bob McCarty wrote:I believe from his first post that he has new castings, but wants to use the internal parts.

True but what of the tranny case?
Bolts snapped off inside? Guess I’ve got so many irons in the fire that when I see a project like this I balance it against all I have to do as if the project was mine. I’ll keep my fingers crossed that getting it apart is the tough part.
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