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Farmall & IHC Tractors Discussion Board

Re: Can a SMTA transmission housing be welded?

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Posted by wisbaker on November 12, 2012 at 20:25:25 from (

In Reply to: Can a SMTA transmission housing be welded? posted by BigTone on November 12, 2012 at 17:24:50:

Can it be welded?-yes Can you do it?-probably not. As other have eluded welding cast iron is something between art and black magic for us who can't do it. Take it somewhere with a skilled welder who does and knows cast iron. Cast iron is brittle if you don't do proper heat control as it cools you hear what sounds like little chimes going off as your newly welded cast iron proceeds to crack in several places-don't ask me how I know this. If it is a crack or hole in the middle of the housing, like say maybe something wedged between a bull gear and the housing AND it's not where you're bolting something on or pushing in a bearing or providing significant structural support or locating a shaft or axle you might be able to braze the hole shut, not quite as skilled of a project and if you have access to an Oxy-Acetylene rig you could probably pull it off. One of my High School friends Dad often dealt in used equipment, would buy junk and fix it up, run it a while then sell it. They bought a John Deere 350 crawler with a cracked rear end housing. They decided to weld it. To preheat it they had about 150 pounds of charcoal burning under the rear end, we teased them about barbecuing their bulldozer for years. Another thought- if you're not looking to have a totally correct expo quality tractor ask around and look around, you might run into a 400 or 450 housing & rear end and swap out enough parts to maybe get a fast hitch on you're tractor. The 400 and 450 diesels are expensive to repair so one with a bad engine might be a deal for parts on the hoof for you.


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