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Welding cast

B

Brokengun

Member
I managed to break the ear off the end of the transmission on my 550 massey combine that is used to tighten the belt.

I have seen different types of welding rods for cast so...Any suggestions for the best type of welding rod for cast?

ANy other thoughts for repairing this piece?
 
Unless you are a welder by trade.Take it to one that is.Cast is not a material to learn to weld on.Proper preparation and welding technique is 75% of the job.Good cast rod is in excess of $40.00 per pound,another reason not to waste them.
 
My dad taught welding for years and always used an analogy to get people to bring it to him first and not try and fix it themselves. He always said its like cooking a steak, you only have one shot to get it right.
 
Hi
Like welding man said unless you know what you are doing, leave it alone and pay the money to a guy that does know first time. I have had regular steel stuff here like loader booms, guys tried repairing on the cheap and messed it up. I couldn't fix it easily after, and if it came here first it would of been cheaper, than rebuilding half the side of the boom when it did get here.
If the guys good and honest, he will tell you right from the start if he can do it, and if it will last or not before even doing anything.
Regards Robert
 
I have welded cast before but the area wasn't critical like it is on this transmission.

Your not upsetting me by saying I need to take it to some one with more experience.

Tell me do you guys think cast can be welded so that its strong enough to work/last?
 
From your experience can “CAST” be repaired to be as strong as it was before or at least close enough to work?
 
Every piece of cast that you repair or attempt to repair is different. If your housing is an oil reservoir or is oil soaked, preheating is a must. If you have bearings,seals,etc. in that area,that's another problem. It will have to be disassembled to do a good job. Cast can be repaired and will be as good as before if done properly ,but it's not a job for a novice. As others have said, if you screw it up no one can or will attempt to repair it right.
 
I think you are much better to get a different casting if possible. The welded area on cast will always be weaker, unlike steel. There is pretty good success patching holes, but I doubt it would handle the stress.
 
Thank you for your advise!

I have found a local welder that's good with cast and I'm going to talk to him.

thank you again
Brokengun
 
I have a cast iron part for a machine that someone brazed and did a poor job of it. I ground as much of the brass off as I could and took it to a reputable welder to have fixed and the guy turned the job down. Then I did some homework to find out how to do it myself. From what I read you have to heat the whole part up to about 1000 degrees and then nickel weld it and before it cools burry it in sand so it cools real slow. After reading all that I started making a new part out of steel.
 
Does a lot have to come apart in order to be able to heat it up? If there's not a lot of heat involved with the finished part(like an exhaust manifold)brazing would be a very good choice to repair it but needs lots of preheat and someone with experience. However there are cast electrodes that can work successfully despite some people saying they won't. Sometimes small cold welds can work. A place like Castolin Eutectic would be a good place to ask advice.
 
Is there enough material behind the broken part that you could drill and tap a thread in it? I repaired a clutch housing that way and did some welding on it also. You could grind it flat and attach a piece of steel to it to recreate that ear. Remember, they made it all out of cast to keep the cost down.
SDE
 
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