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Ductile Iron parts

RZucker

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@Nige - Yes, but this particular old girl had done quite a few years work at the time I took the pic (2013) & is still working, albeit farm / property maintenance.
I'm betting that swing tower was cast steel, 1981 was way back before the "Do not Weld" stuff was coming out. I have repaired that cast steel stuff myself, it holds up well.
Back to my original post... Has anybody here repaired a "Do Not WELD" part??? And had real success?
 

RZucker

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Cast steel is no problem but you need to know what material it is instead of guessing.
True... But in the field... and "Gotta have it now".
I have done piles of repairs on Terex, Wabco, Cat, and other scraper hitches with good success. (no repeat failures) by preheat and normally 7018 if I had to use rod, or Hobart Fabco 802 or Lincoln 71M. Some of those had to be gouged 2.5-3" deep. Preheat would be 450-500 degrees Depending on how I "guessed" it.
Really glad to be out of the big yellow stuff now.
 

RZucker

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I'd guess on a scraper it would be cast steel. A lot of times you can tell by how it welds or grinds, etc.
Um, yeah. Cast steels, I misunderstood your post to be about different cast steels. Ductile will tell you in a minute by how it grinds. Has that funny odor too, just like grey cast iron.
 

repowerguy

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Yeah RZucker I weld repaired an outrigger on a 580 Super L about 20 years ago and it’s still going strong last I heard. It was broken in two from a trailer jack knife crash and it was my job to weld it together again. I welded it with a nickel rod made by PALCO, I welded a short length then peened it out with a air chisel with a blunt round tip. Finally for good measure I fish plated it with a piece of 1/2” steel and welded it with the same nickel rod.
My time was cheap then and parts were expensive.
 

JOSE G BENAVIDES

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Is possible definietly to weld a Case Boom, well it depends how big the crack and the position of it, we did it, have used even the backhoe with a hydraulic hammer and no problem, we weld with Nickel and little by little, 1" and 1 hr later anothe inch, put a 5/8" plate with 5/8" screws grade 8 and is working great. Save us a lot of money
 

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hosspuller

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Jose GB … Looks like the third photo shows it being rewelded after some time. True ?? One does what they have to do at that moment in time.
 

JOSE G BENAVIDES

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Hi, no, it was the only time, we make the crack bigger with a V shape before welding and grind it nice, then weld it and reinforce with the plates and screws
 

DMiller

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Had a couple of old concrete machines(slip form pavers) had a lot of ductile iron components, between vibration and impacts they would eventually crack being pretty well buried in slop and the overlaying machine components. Used a high nickel rod supplied by AIRCO back in the day, told us to rosebud heat then weld then reheat and allow to slowly cool(Anneal) worked reasonably well in the late 70s, owner of the company was a Enganear by education so designed welded replacements and had built. As the components would fail later would install the Steel welded replacement awaiting as figured would re-fail, had them stored away in a old CONEX and had to dig them out where as the company sold off in the mid 90s the welded assemblies were still hanging in there.
 

Mother Deuce

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I think you're 100% correct that they are all cast. I don't generally get into "Lawns & Gardens" type stuff so it's all a bit foreign to me. I see that the equivalent structures on backhoes are fabricated and therefore are weldable.
TBH I am of the opinion that Case are covering their a$$es by putting the "Do Not Weld" indications on there. Maybe the type of customer who would own a backhoe might not be very skilled at welding. I guess there is something in that.
To give you an example a Cat 992G/K loader boom is cast and is weldable. I am not sure of the material, probably not ductile. There are very lengthy and detailed instructions available giving the exact procedure that must be followed in order to carry out weld repairs on it, and also detailing certain areas of the boom where it is absolutely forbidden to weld. But then again the average 992 loader owner would likely have a fully-equipped maintenance shop plus probably one or more specialist welding companies that they could call on to do welding work on cast material.

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“Lawn and garden” LOL That’s regular stuff. The mining toy box is just bigger than the regular stuff box. Pretty funny though... I almost blew coffee out of my eyes!
 

Nige

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G..G..G..Granville.........!! Fetch your cloth.
That expression comes from a time when a certain Cat District Office was populated with mining guys because that was probably 80%+ of the market volume in that area at that time. The only exception to that was a single rep who dealt with the "everything but mining" product lines. e.g. backhoe loaders, MWL, ADTs, SSL/CTL/MTL, etc, etc. His area of responsibility was always referred to around the office as Lawns & Gardens.........
As one of the mining guys always used to say - "If you can't walk underneath it you shouldn't be working on it."
 

John C.

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The usual line of derision about the small stuff to the sales force was "I'm waiting for the Cat chain saws and weed eaters."
Now days I'd rather fix the small stuff. The climbing up and down and pulling on 600 foot pound torque wrenches was killing me.
 

Nige

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G..G..G..Granville.........!! Fetch your cloth.
Now days I'd rather fix the small stuff. The climbing up and down and pulling on 600 foot pound torque wrenches was killing me.
Nowadays like an aristocrat I have a "man" (or "men") who do that. I just stand around, wave my arms around, and try to look important, or is that impotent......?? :D:D
 

John C.

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You might let someone at the Cat dealership know about that one. Cat has another brand of generator under a different name I believe.
 

Birken Vogt

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No I am talking about little portables that 2 men or one burly guy can pick up and carry. Set up like little Hondas with the gas tank on top.

We recently had a couple Olympian/FG Wilson sets come through and the Cat dealer like always had no trouble getting the parts we needed.
 

John C.

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If the units from China carry the Cat name I'd bet people at Cat would want to know it. No one does knock offs faster than China and cares least about ruining anyones else's name.
 
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