The weld looks nice, but it will just crack again after a while. The area immediately around the weld has been severely heat affected making it prone to developing further fractures. If the job is to be done correctly, a stretcher plate should be placed over the repair and welded in carefully. The stretcher plate should also not terminate in a right angle across the boom, instead it should be diamond or V shaped as to avoid creating stress points that might also create possible fractures.

First, here's some tips given to me by a Caterpillar tech. You have to cut a larger section out, make sure and clean everything (these machines are always caked in grease in my experience) and cut bevels into each edge. After you weld in the new plate (no beads wider than 2x the width of your rod and only 7018 or 8018) clean it flat and put what we call a fish plate on top. Cut a square a few inches larger than your repair, and 45* the edges off about 2 inches in on each corner. Weld up the long sides, and don't weld the 45* edges. When you start and finish one of the long edges, make a little curl....don't start/end the actual weld on the part. Start about an inch away from the plate with the little curl, then tie into the fish plate. After learning this, I've never had a boom come back for the same repair.

Hmm, looks like a repair of a previous repair, which is NOT good..

I would never use a grider without safety glasses

Not a proper structural weld.

As a retired welder, machinist and fabricator, there are 1000 ways to repair the boom. Your way was 1 of them, but it's 850 choices down from being the best choice. Aside from the fact you weren't using enough heat, you should have been using a heavier rod just for starters. And guess what, the boom is going to crack again, but at least twice the size. You don't understand metal fatigue or welding. Quit making videos and go to school or serve an apprenticeship.

I don't see the point of cutting a wide notch just to scab a little chunk inside. You need to think of the whole boom as a dynamic elastic noodle. Now it's got a stiff spot in the middle of an elastic beam. It's going to crack again. You need to add fishplate reinforcement with long feathered slopes to allow elastic bending to occur over a metre of length.

I worked at a sawmill that used 6 excavators with grapples to sort logs in the yard. There was one operator that was constantly breaking machines. Very rough on them. Summer months were already 18 hour days trying to keep up with rolling stock maintenance, then have that one guy causing all kinds of extra work. The worst was the house bearing cracks that ran almost the entire circumference underneath in the well. It had probably over 100 pounds of old grease that pushes out that had to be scooped out into buckets, then steam pressure washed which was absolutely miserable. That hot steam mixed with nasty grease swirled around and plastered your neck. Only after it was cleaned could you see how bad it was. The excavator was very near breaking off and falling off. That replacement bearing 25 years ago was over $50,000 too.

Didn't fix anything, but if you paint it it will look good.

Доброго времени суток...у меня есть один вопрос...почему вы не делаете накладок и как долго работает стрела после такого ремонта? Не идут ли трещины в около шовной зоне? Больше спасибо за ответ)

Very nice work!…. I agree with everyone else, weld is strong but you should weld on Diamond or V shape reinforcement to strengthen the stress on that break! 👍

Came to see the weld. Stayed for the tunes.

I'm no welder but I think an extra plate to cover the weld area and beyond would be a good reinforcement. Unless they want more work in a Month's time.

Amateur welding..!!!

You can’t weave welds that far. Australian boilermaker will fix it

Just another Utube welder.

Might Crack again, will Crack again. Some say too much heat in the area but that is solved by plating the weld areas with same plate and a 3 plass fillet

the fucking genius move to use the wires to weld those plates on the inside first: incredible.

Так на продажу делают - красиво, но работать не будет.

Поверх места сварки ещё бы пластину наварить усиливающую со значительным нахлёстом, а то видно как новая трещина пошла совсем рядом с местом сварки предыдущего ремонта

Прошёл год ! Каково состояние стрелы на этот день?

Your only supposed to weld 4 times the diameter of the welding rod! So 1/8" wire is a 1/2" weave!!! But nice looking weaves my friend

This is already a second repair in the same spot, I would plate the area to keep the crack from propagating again. Nice looking welds though.

I thought that it was pretty but not structurally sound - knowing nothing about metalworking or welding, I came to the comments to see what those in the know thought. I'm happy to see that my belief is confirmed 😊👍

Pretty good job. I would have done multi welds rather than that big cap at the end and stuck a plate on top big enough to clear the weld below and any badly effected heat zones but all in all good job.

That should last…. A little while..

I'm not a welder but I'm pretty sure you can only heat the same spot so many times before you begin to weaken the metal in that area. It already looks like it's been heated a few times.

Красиво-не спорю, но он прослабил стрелу еще больше, в этом месте и рядом с ним сейчас самое ломкое место, без накладных, такого сварного бы на его же кабеле повесели, те кто работает на технике

Nice simple neat repair, I know it takes the neatness away a little but when I’ve done them in the past I’ve repaired like you but then added a larger plate over it at least 100mm past each side of original split and I know it’s lasted 4 years so far 👍🏼

Minimum eight mistakes in repair job. 😐

We're to begin at on how to fix this so it doesn't crack out again. On the vertical seem repair it needs to be cut out and a insert with radiused corners needs to be installed . Prepped and cleaned from all paint and grease. The top plate on the arm with the crack needs to be cut out past the end of the crack and the replacement plate needs to be smaller then the vertical insert . Top insert also need to have radiused corners too where it lies in the arm . Normal square edges on the outside of the arm . Leave a 3/32 inch gap around the insert bevels . Make sure it's clean and let her rip

To the un initiated the weld does indeed look excellent, BUT I completely agree with all the guys below. As a once heavy plant fitter, I too am very skeptical that the area to be welded was not beveled & there should have been, after cleaning, re-emforcing plates welded to the area. I remember doing similar to the old tipping links on J.C.Bs.

Excelente trabajo mike saludos desde sinaloa mexico

parabéns trabalho muito bem elaborado colocou calço pra penetrar mais a solda aí sim feito com carinho

Most heavy equipment I’ve seen says “ductile iron do not weld” on the booms

Good enough to sent to Auction!

Congratulations on a job well done "on the road". I've been welding since 1979-1980 after my license and I am constantly amazed at the greatly improved level of quality and safety of the job site's work.

wonderful video, does anyone know the name of the track?

I would not trust the weld till it's been X-RAY. Wisdom from a welder who welded oil/gas drilling rig derricks & pipelines.

You were on the right track, until you put in those wide weave passes. That thick backing plate also creates a stress riser on the inside of the component, pretty much guaranteeing a future failure in the same area.

Das ist eine Amateur Reparatur, keine Wurzel, zu breite Naht, keine Verstärkung der Reparaturstelle. Bei professioneller Reparatur ist die Reparaturstelle hinterher stabiler als das Original, das ist hier nicht gegeben.

Оце вміє !!! Вертикаль варить і дуги не рве ! Молодець.

Buen trabajo, tal vez ir dandole unos golpes para eliminar las tensiones, pero muy bien hecho.

Love the Krylon Finish.😅😂

Looks good but it will crack again over time. But he probably just did it to keep it operational. Sometimes thats all the customer wants. Even with the proper repair, it might still cracks else where. Ive seen it plenty of times. My repairs haven't come back yet but it will.😂

🤔No point in that! Well at least they know where it is going to break again😁 Maybe a few support plates stuck on after cleaning the mess up champ👍🏻🇭🇲

this guy can weld ... buts needs training ............ this should be plated

To me that's a start. Plate it all now with large plates. But what do I know. What does Issac say? That will tell all!

A grinder and some paint makes me the welder I ain't.

You think you would box in the crack with news steel..... But then again im usually the one breaking things..

When was this repaired ? Has it bust yet anybody know......?

It would work to get you out of a hole. But a proper fix would be to cut out the full section and weld back in, there’s too much stress on that area for it to last (I hope it does like) but yeah, cut the full monty out and then glue it back 💪

Amateur job, it will be full of stress cracks, and break again.

Good work . Seriously

Sometimes all the customer wants is to kick the can a little further down the road. This repair would allow them to finish the job or season without shutting down for too long.

Pretty weld, but it won't last. The metal around the cracks is stressed from the previous weld. Additionally, metal fatigue is an issue. To fix correctly, a six inch section on both sides of the break needs to be cut onto, and a filler plate that's beveled on all sides needs to be welded in place.

Weaving the vertical part of this job should have been done in at least two or three sections not one mass weave, I do not think this would pass X ray test

I was taught to drill end of Crack so it won't spread then after you are done welding you fish plate the outside.

Under 4 minutes... Shit my guy would have charged me 10 Hours😂😂😂

kok plat tambalan cuman di pasin lubang nya? kakek saya biasanya lubangnya di lebarin lagi..di kasih lubang panjang horizontal di atas dan bawah...baru di kasih plat

الله ينور يا هندسة

Súper hermosa obra de arte sapatero a su sapatos

1 no preheat 2 the weaves on the weld are to big this will definitely break again soon!

Guess everyone in the comments knows welding. So many genius people they themselves dont wanna work.

THEY BROUGHT IN THE PRO

If it was done right the first time it wouldn't of cracked again.

Great job Mr

Did the piece you put on the inside with a string stay or was it removed afterwards?

Perhaps the third* repair there will hold. * It's obvious that spot was repaired previously, so I'm assuming that the video is showing the 2nd time that location was repaired.

Should have put a gusset plate over the welded area

Fantástico amigo parabéns

Should you gusset that?

Great job! How do you prevent loose grease inside the boom from starting a fire while you are cutting out the hole?

Beautiful job

Some really beautiful welds, nice 👍.

Will this affect overall strength?

Right or wrong, He made Zeus proud.

Ah! you wanna on big ass gorilla weld! So much for stringers

Any weave like that is not strong. Should have run stringers not a 3 inch weave. In the USA that boom would be scrapped. Don’t get under it

I’m guessing the customer only wanted to pay to have that area patched up, not to fix it properly which costs more money 🤷‍♂️

It's like Boeing training video.

Excellent job 👍

The old saying looks can be deceiving.

这个小伙子挺帅的，有媳妇没有？

Que soldadura están usando

What's the diameter of the electrode and what type?

I love to watch welding videos just to read the comments of all the superwelders out there that will tell you all about how you’re not doing it the right way which is their way.

Doubt that would pass xray. Lol 😂

Najlepszy jest pojemnik na elektrody.

Greetings from Venezuela. I really like your work. It is very impeccable and professional. What type of electrode do you use for this type of welding, my friend?

Не правильно придальнешом парвет там же

Im even a welder But i def would have welded plate over that section

This is cosmetic only. It's not structural in the way. I guess it's good for job security. He'll be back in a month or so.

Very very very nice job bro !!!

Если перед продажей.. Можно было снять фаску и заварить поглубже... А так наверно лопнет опять вдоль приварки

Beautiful skills!

I've had to do this work often.

Молодец!!!!

Never weave with stick welding like that lol. This is just a temp fix, a good repair should be done when it is given time to do so. This will crack again, no doubt.

Not sure about that giant Texas weave. Stringers are much stronger. Then fish plate it.