JB Weld for MTA crack?

BigTone · Jul 14, 2014

Afternoon, I was thinking about the crack in the underside of the transmission housing on my MTA (from a bearing falling out and getting under bull gear). I don't believe there is any pressure in the rear end to blow the JB Weld out so wouldn't that fix the problem rather than having to break the whole tractor down to weld it? Hopefully I don't get laughed out of the site on this one but it was just a thought...thanks for the advice, ~Anthony

souNdguy · Jul 14, 2014

i'd braze it before i wasted my time with jbweld.

it's good for many things.. but most of those many things should not include anything on a tractor.

Bill Lisbon · Jul 14, 2014

Been there, didn't do that. To fix it right split tractor, turn housing upside down, I did this with out taking tires off, just flipped it over. Clean all oil out of crack, when you think you have it clean enough, clean it again. Weld it with cast iron rods, or braze it. You could cover the weld job with J-B weld to seal up any small cracks or holes in the weld. Do it once do it right.

gab · Jul 14, 2014

I put some kind of epoxy on a crack in a M's belly about 30 years ago and I know it held for at least 10 years. Your going to have to grind the paint off, pull the plug and drain it a few days or a week, brakleen the crap out of it until it stops seeping and go for it.

sd pete · Jul 14, 2014

Drain it and do a good cleaning job and it may
work.

Jackin Daweiner · Jul 14, 2014

Just find a rear end from a smta and install it on your tractor or
if u have to yes tear down clean it super good and weld or
braze it. Jb weld is worthless

BigTone · Jul 14, 2014

It's my wifes late fathers tractor, I have to keep it complete and original...

Ellis Kinney · Jul 14, 2014

Anthony, I am sorry to hear of your troubles. JB
weld is not the fix for your problems. Like Bill
said, Turn tractor over and clean a dozen times. Do
some grinding and braze it. Cast iron brazes very
well. I did this in a friends garage 35 or 40 years
ago and still just fine. Good Luck Ellis

rankrank1 · Jul 14, 2014

Brazing is the can not miss repair for cast iron. Hence brazing is what I would do if it were mine. It is a family heirloom tractor plus it is a SMTA so certainly worth repairing properly compared to applying a jb weld band-aide type repair.

Welding is not necessarily a bad suggestion either, but welding certainly is not a can not miss endeavor when it comes to welding cast. You can sometimes do more harm than good trying to weld cast if you do not know what you are doing or if it is a cast type of metal not real friendly to welding.

teddy52food · Jul 14, 2014

Back in my younger days, I overhead brazed up more than one without taking anything apart. Just drain it good & leave the cap off the filler to let the smoke out.

CenTex Farmall · Jul 14, 2014

Depending on the size of the damaged area, my concern would be to stop the crack from propagating further. JB weld may stop the leakage but won't hold the iron together. Since this one is worth keeping go ahead and plan to braze or weld.

Anonymous-0 · Jul 15, 2014

I agree with others that brazing is the best solution as you want a garanteed permanent fix.
That said, jb weld has certain uses...I fixed a short crack in an f30 block 15 years ago and its still holding fine. No cooling system pressure on these,of course.

JB Weld for MTA crack?

BigTone

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souNdguy

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Bill Lisbon

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gab

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sd pete

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Jackin Daweiner

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BigTone

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Ellis Kinney

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rankrank1

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teddy52food

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CenTex Farmall

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Anonymous-0

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