Cool I was part of the Engineering team at P&H, Pauline and Harnishfeger, in Milwaukee Wisconsin. We redesigned the arch, teeth, shrouds on the bucket and a guide of the foot on the house. As the foot moves backward it picks up the house just enough to clear the ground the foot lifts moves backward, the guide keeps it from wobbling, then drops down and the cycle starts again. The deadline walks kinda like a turtle. One of the best jobs I had around 1995 to 2000. The machine took 3 years to design and 3 years to build. It went to Australia.
@lozarok2 жыл бұрын
Nice one - Draglines are a great piece of Engineering
@orvillelambdin4392 Жыл бұрын
I love big earth equipment. Wish I could see one of the huge draglines in person before I die that's for sure. They are in my opinion mechanical marvels of ingenuity.
@OldFella547 Жыл бұрын
Hi. Brings back memories as Over 20 years ago I was a Fitter at Ulan out from Mudgee in The NSW Coalfields in Australia & on many occassions worked on The Marion about The Same Size. We Changed everthing from Buckets to Drag Ropes, Chains,The Head Pulley at The top Of The Boom ,IBS Ropes & used a D 11 as well as a 20 & 40 Ton Grove Crane however we also used mainly Land Cruisers except when it was really wet & The Job was Urgent then we used A Nissan to tow our work Trailers as they were much better in the wet. Also we used to Weld all The Links together to make Drag Chains which we called "The Jewellery".
@lozarok Жыл бұрын
Awesome Feedback mate , appreciate the comment
@AdvancedUSA2 жыл бұрын
Some people just like to complain. I’m happy that someone took the time and effort to post this. It’s something that very few people will ever get to see in person. Look at the links on the bucket chain. Bet just one link weighs 200+ pounds.
@truebluekit3 жыл бұрын
Dang... when that bucket got lifted, it really did look like a monster came to life.
@lozarok3 жыл бұрын
when they fire up mate it is awesome - the lights dull and away they go
@gregorytoddsmith97443 жыл бұрын
Top wire ropes off the end of the boom for the "Hoist" motion. Orients the bucket and either raises or lowers the bucket. Called "dump" here. The lower ropes are for the "Drag" motion. Pulled toward the machine to fill the bucket. Both are spooled on huge drums inside the machine just like a winch on your vehicle etc. but BIG!!😏 They are payed in or out simultaneously or individually by the operator to either fill or dump the bucket. The turning of the machine is referred to as the "Swing" motion. The machine moves itself with the "Propel" motion. Large electrical conductors are referred to as "Cables." "Wire Ropes" are used to support a load. These machines use huge electrical motors to run them. They remove the overburden/soil to expose the coal that goes to the power plant and produces the power for our lives. The machine actually digs to power itself...and us!!⚡⚡ Thank you miners! Be safe! Thank you power producers. Be safe! Go Wyoming Coal!!! Edited to say....Go Aussie miners and miners worldwide!!! Be safe! Good on ya!!👈💪🔥⚡
@jackrideout43274 жыл бұрын
Interesting mate! I’m a mine boily and we look after 3 draglines and the way we do dump ropes it similar but a different to what’s in this video. Depends on weather it’s a broken dump rope or just replacing a worn one is to how low we have the sheaves. For a dump ropes that aren’t broken we set the sheaves about 5m of the ground to avoid tangles. All we use the oxy for is to cut out the retaining pins and to pull the becketed end out we use a 1 tonne sling fed up though the dump rope socket. We then pin the new dump rope at one end and then hook it up to the old one with a short chain and pull it though the sheaves. For broken ropes we lower the sheaves so we can get a 3tonne sling though and then feed the new ropes though that way. It’s interesting seeing how different sites go about there dragline rigging though
@lozarok4 жыл бұрын
Great feedback mate - we all have ways of getting things done at our sites and whatever works safely and efficiently is worth a go for sure - are you guys single dump ? cheers
@bkh57463 жыл бұрын
Well atleast its not a page dragline.we went in one time cut the whole gear rack off.we had 5” steel cut for the new rack welded all those bastards back in.talk about a job.left the tub under the machine too..
@bkh57463 жыл бұрын
Yeah we used a komatsu loader with jackhammer and a jib pole.do most the work with it
@stevemiller3082 Жыл бұрын
Man, thank you for taking the time and effort to put this together and share it. My father sold conveyer belt and belt cleaning equipment/products. He was centered out of Paducah Kentucky at the time. He took me to a couple of mines but I didn’t see anything like this. Wholly wowzers.
@lozarok Жыл бұрын
No worries mate - cheers
@Healthliving19673 жыл бұрын
Ive seen plenty of these drag lines from a distance when i was working on the mines but to see one up this close-WOW those buckets are massive,way bigger than i thought.
@sparkyplugclean24023 жыл бұрын
Yah, it could easily scoop up that d10 on accident.
@alternativeperception69493 жыл бұрын
Dad worked on the maintenance of Draglines in South Africa in the 80's early 90's . I knew from his description they were big but my god to see it with men and machines by it to get a scale of thing WOW just WOW 👍👍👍
@randallfrank56823 жыл бұрын
Having done this procedure multiple times myself on a lot smaller draglines (Bucyrus Erie 15-B, 38-B, & P & H 1055), I think that it would have been nice to have some narration about the process and why it needed to be done for those not familiar with machines like this. That cutting torch is interesting.
@Bigsoot73932 жыл бұрын
It's Australia mate mining company probably sue him if he narrated it and it wasn't to their procedure. And I think that's a thermal Lance not a cutting torch
@dalen.tenney5210 Жыл бұрын
With becketed cables it would seem unnecessary to cut one out!! Not to over display my ignorance, but what the heck is a lance torch???!!!
@randallfrank5682 Жыл бұрын
@@dalen.tenney5210 A "lance torch" just looks like a huge cutting torch. It looks like he is just cutting off the end of the cable. I never used one that big and they were all right angle tips. We used to call them "fire wrenches."
@dalen.tenney5210 Жыл бұрын
Thanks Randall ! Appreciate you taking the time to enlighten me :). Never saw or used one tho I've had plenty of experience using a cutting torch around draglines. It appears to be right handy to cut something in a 'hole'. Thanks again for responding :)
@B100-c4m Жыл бұрын
That torch is indeed a "normal" oxy-fuel cutting torch. the straight forward tip is uncommon to most people because its far from ideal in most situations. Short torches usually have 90 degree pointing tips, best for benchwork. longer torches usually have the tip pointing slightly forward, best for demolition cutting. they can also be custom made. i recently ordered one that was not standard so they had to make it. 800mm long with a 90 degree tip for cutting 10" steel casings from the inside(piles for foundation repair)
@RustyorBroken Жыл бұрын
That's just a small machine. When I was a young boy I had a dragline that moved massive amounts of overburden. It was built by Tonka. I liked it so much I had those guys build me a stripping shovel, haul truck, road grader, and dozer. The dozer was the biggest unit ever built at that time. It was the same size as the haul truck!
@Leafgreen19762 жыл бұрын
I've seen these things on tv for years but never really knew how big they were until you put a D10 next to the bucket.
@kennethney42603 жыл бұрын
I live in the "coal region " in PA. When the surface mine closed they abandoned these machines right where they sat. The largest was about the size of the one in the video. It sat mostly instact until about 20 years ago when steel prices jumped and it was worth scrapping. There were several of the drag line buckets that sat in locl scrap yards for years until steel prices rose enough to make it worth cutting them up into shippable sized pieces. The biggest drag line was known simply as "the crane" and if I remember correctly was manufactured by Bucyrus
@tomcander36693 жыл бұрын
Maybe in PA but Ohio had the world's largest, the Big Muskie
@rippitallout1493 жыл бұрын
Everytime coal prices go up all these little independents pop up, take the investor money, produce nothing, then they abandoned the equipment right there. I've seen this so many times throughout the years here.
@Frenchy30552 жыл бұрын
From someone who has done this job countless times on a Marion 8900 155 cubic yard dragline, this job can be done a lot easier and faster. 1. Have one end of the dump ropes (the arch end) already socketed. 2. Set the bucket down on the arch and replace the dump ropes, sockets and all. And this is important because you don't want to put on a new rope on with a worn out socket and bushings. These sockets carry a lot of weight so the bushings wear really fast. 3. Let the bucket back down and lower the dump sheaves one at a time over the side of the bucket to feed the new dump ropes through the dump sheaves. 4. Then pull each dump rope up to the other sockets.
@timb7775 Жыл бұрын
Must be so fun to work around those huge machines.
@lozarok Жыл бұрын
The best - an adventure each day
@mrc1539 Жыл бұрын
Years ago I saw some of these draglines working around “Big Brutus” in the Southeast corner of Kansas and from a distance they looked small compared to Brutus .
@punaheleboy2 жыл бұрын
Every one of those men seem to know exactly what’s necessary. Seems easy enough . That digger is a beast.
@Most_Trustworthy_Weasel2 жыл бұрын
Favorite part is when that bucket gets picked up!
@lozarok2 жыл бұрын
For sure mate
@alkennedy11243 жыл бұрын
That is a lot of power for a small deeper, it amazes me how big for a small amount of material movie goes, kool rake BigAl.
@sandipgupta14463 жыл бұрын
Hi in in b the CV i
@cesarpalmos823513 күн бұрын
Each "small" shovel full is 380 tons, or 760,000lbs/344730 kilograms.
@traviswilliams9104 Жыл бұрын
It's so crazy to see how big the body must be compared to the bucket. Yea the bucket is larger than a d10 but that bucket looks like a flea next to the body of the dragger...
@paulne1514 Жыл бұрын
I used to operate a Bucycrus-Erie dragline. Looking at this one, mine seemed to be a Tonka Toy!
@technikwolle4 жыл бұрын
normally producers of ropes and chains have drawing benches (dont know, if this ist the right word!) , which are able to test the resilience before tearing. I would like to see this chain tearing!
@jonathangray70674 жыл бұрын
That's Columbia steel casting chain link, it doesn't tear, the pins in the clevis will probably give way first, or the rope socket.
@lozarok4 жыл бұрын
all it takes is to get caught in he Rock and then shock loaded and 5 Inch Chain is torn in half
@Parents_of_Twins4 жыл бұрын
Wow. It's hard to imagine how large that bucket truly is until you see a D10 parked up against it on a ramp and the D10 looks small.
@monroyu95194 жыл бұрын
Bro i can't imagine how big crane is😐
@strangefruit87764 жыл бұрын
The dude on the d10 had some balls approaching that bucket. There’s no way I’d be trying to hold that thing up with a d10.
@marie.mcallister51774 жыл бұрын
Olo
@marie.mcallister51774 жыл бұрын
@@monroyu9519 cid
@markmcc784 жыл бұрын
@@strangefruit8776 good point. That bucket would squash that rig!
@donnebes94213 жыл бұрын
That chain is humongous! Looks like something Mr T would have been wearing.
@markmcc783 жыл бұрын
W
@AndyFromBeaverton Жыл бұрын
or the USS Missouri BB-63
@chriselliott85094 жыл бұрын
It's big, but it's no Big Muskie. Still, I'd like to take a scoop with it, seeing as the 4250-W went to the scrappers. I remember watching the 2570 swing from my backyard in the late 90's. Pretty cool to see even from far away because you know its humongous.
@timrankin87374 жыл бұрын
There a pic of 2 greyhound buses side by side in big muskies bucket.
@chriselliott85094 жыл бұрын
@@timrankin8737 And a high school marching band. My dad worked on the Muskie when it was in operation.
@timrankin87374 жыл бұрын
@@chriselliott8509 thats soooo cool. 👍
@zzirSnipzz13 жыл бұрын
Well this one is better than Muskie as its still operating an muskie is in the scrap heap ;)
@chriselliott85093 жыл бұрын
@@zzirSnipzz1 True enough. Muskie was a temperamental ol girl. Lots of breakdowns and maintenance. Between that and the clean air act, it wasn't feasible for it to stay in operation.
@ginoasci3 жыл бұрын
i usually change those out by myself without any machines while eating a sandwich with one hand.
@Tgiles133 жыл бұрын
Sure you do..
@ginoasci3 жыл бұрын
@@Tgiles13 : why don’t you believe me?
@Tgiles133 жыл бұрын
@@ginoasci because ive done dump ropes before and you do need other machinery to do it.
@johnmckinson84732 жыл бұрын
Me too, but while eating rice
@stephenrice45542 жыл бұрын
Fast forward past the music , watched bits and pieces that weren't weaving around . Got the gist . Fair video 👍🇬🇧
@dougjust9518 Жыл бұрын
Okay, from the git go. Aint the biggest, Yet Very Impressive. 😊
@lozarok Жыл бұрын
9020-s good machines
@GhostOfDamned3 жыл бұрын
This looks like waking up a dragon from a long nap
@godbluffvdgg3 жыл бұрын
Jeezus! What took so long? That was like three minutes before it was operable...I did a 9040 in 2 minutes barehanded...
@joebond50123 жыл бұрын
Those massively thick cables looked relatively flimsy in the long shot at the end!
@mog58584 жыл бұрын
thanks for sharing. no pictures or videos on our mine sites in Canada. are 9020 is running strong.
@downunderfulla60014 жыл бұрын
None in Australia either while working for BMA ( BHP. Mitsubishi, Alliance (South Africa)). Instant dismissal. Must be a Contractor pit
@lozarok4 жыл бұрын
9020's forever mate
@mikeuyeda23302 жыл бұрын
Serious job and lots of heavy, dangerous equipment and someone wants to play the clown. Even his co-worker thought he was being a fool!!
@BobSweete4 жыл бұрын
Great video. Finally saw how a spreader works
@thebohemian93113 жыл бұрын
Welcome to PANDORA.........but where are the AVATARS ?????.
@Goldarr19003 жыл бұрын
That machine vs King Kong.. it would make a great movie.
@SchnelleKat3 жыл бұрын
Insanity man... U don't realize how HUGE them chains are until its on flat ground
@WalkerRM33 жыл бұрын
I wonder how and I wonder why
@adambergendorff27029 ай бұрын
Love seeing the big machinery!
@mrwest55522 жыл бұрын
job complete, no injuries.
@lozarok2 жыл бұрын
The name of the game
@jrrockett3 жыл бұрын
Columbia Steel Chain. So I have to Ask, how well do the Bushings Holding up in the End Links and How long do the Rope Sockets Last.
@jstoli996c4s4 жыл бұрын
When a bucket makes a D10 Cat look small...
@lozarok4 жыл бұрын
94 Cubic Meters
@steeveedee84783 жыл бұрын
A D10 Cat at that.........!
@hippietomcan19813 жыл бұрын
Wow, thanks man. That's a really cool walkthrough. Very cool...
@thvtsydneylyf3th0772 жыл бұрын
chrs for posting that ay, need more of this type of content
@tabuilder2 жыл бұрын
I noticed that these guys are very efficient. While they were changing the "becket" ropes they also changed the bucket ropes.
@markfryer98804 жыл бұрын
I was wondering where this mine was? Isuzu Service Truck and Toyota Land Cruiser Service Ute said Australia. Then they mouth off and that confirmed it as Australia and most probably Queensland. Stay safe boys and girls.
@lozarok4 жыл бұрын
on the right track - be safe - cheers
@Senkino5o4 жыл бұрын
@Muckin 4on Not Coal.
@samcrewe17913 жыл бұрын
@@lozarok Ensham?
@SJR_Media_Group2 жыл бұрын
How you know when your are working on a big machine... it takes a crane to just move the individual cables. Add massive chains, links, and pins that require heat and brute force. Good thing you don't have to replace those every day. Once a years is hard enough.
@joelmillard13974 жыл бұрын
3 1/4 " rope, big boys n big toys
@markmark20804 жыл бұрын
I'd love to have a chance to climb all over that thing. I've seen Big Brutus In SE Kansas, they told me that they used to let people climb up the boom, until the insurance company found out, that would have been fun.
@MrCarnutbill673 жыл бұрын
I remember seeing Big Muskie when I was a kid here in Ohio. Truly scary how big they are.
@alexjohnward3 жыл бұрын
I once had the chance to climb the boom WHILE OPERATING!! I'm not that crazy.
@franklinhayes53982 жыл бұрын
I’ve welded on those buckets but never changed any of that. The bucket was 120 yards
@FlyingSeaMan2566 ай бұрын
Amazing. There’s no other word for it. Amazing
@jerrodbeck1799 Жыл бұрын
And this is why your lights are on and you can charge your phone you tree, hugging hippies👌🏻
@divljacina14 жыл бұрын
3:40 its like a part from some movie with robots 😂 its awesome...
@gregor000054 жыл бұрын
Looks like a welding mask, almost.
@lozarok4 жыл бұрын
LOL
@Demidar6653 жыл бұрын
3:45 the sounds
@kerrysupporter4 жыл бұрын
That’s a handy little machine there
@CAT973D14 жыл бұрын
Would be nice to watch something like that, you can't imagine the size.
@lozarok4 жыл бұрын
awesome working on this gear mate - cheers
@deepakbhoriya76764 жыл бұрын
@@lozarok uh to gi
@deepakbhoriya76764 жыл бұрын
lppp
@nathandove15214 жыл бұрын
Did a great job replacing dump rope. Look long. We run 53footer on the 2550 be
@CrashOveryd3 жыл бұрын
sa fonctionne avec quel énergie cette machine car si cest du gasoil sa doit en bouffer a la second
@jadilsonalvesdasilva71922 жыл бұрын
Grande profissional grande máquinaria parabéns pelo vídeo que Deus abençoe sempre seu trabalho muito bom excelente 👏👏👏
@BladePro2021 Жыл бұрын
Awesome! Spent many years doing that running dragline dozer at a coal mine .
@jamielacourse75784 жыл бұрын
Thank you for being brief with the music..........
@triple67584 жыл бұрын
Yass!
@groundpounder243654 жыл бұрын
Holy wow..that's one huge bucket
@pubcrawlchannel36193 жыл бұрын
Excellent video - cheers for Posting
@lozarok3 жыл бұрын
No probs PCC
@parkfarm2334 жыл бұрын
Great video Loza. Good to see Wayne and the boys still have the goods. Where's Swampy?😀
@lozarok4 жыл бұрын
LOL - Parksley Happy new year bro - Swampy is out the back sniffing paint fumes lol
@shaneward66892 жыл бұрын
fukin hell , you could park the D-10 in the bucket and it would think you gave it a new apartment . must give ya sorta the chills to watch that beast in action...for the first 30 mins or so, then it just becomes "routine"
@lozarok2 жыл бұрын
Love working on the big gear mate
@shaneward66892 жыл бұрын
@@lozarok I'd love a chance to get out and do some work on those beasts , the biggest excavator on the island where I live is a 365 and biggest dozers are D-9 models. I do welding and mechanical repairs on most of them . But it would be nice to see what the world has to offer .
@lozarok2 жыл бұрын
@@shaneward6689 Bowen basin has a lot to offer mate
@UnknowableAbsolute4 жыл бұрын
If i am right, this is mid size dragline, P&H 9020XPC even bigger than this, draglines is really monsters
@lozarok4 жыл бұрын
I don't think there are any operating in the world - only 9020's
@UnknowableAbsolute4 жыл бұрын
@@lozarok Sad to hear that, why in the past true monsters lived in the mine, like Big Muskie or Captain, for now all vehicle not so big as before. Only Bagger 293 remain. What do you think? Why biggest machine like P&H 9020XPC not so popular in our days?
@MICKSHRED4 жыл бұрын
@@UnknowableAbsolute too expensive
@RolandElliottFirstG2 жыл бұрын
Good Aussie production.
@lozarok2 жыл бұрын
cheers for checking it out mate
@keithwarkentin Жыл бұрын
That’s one big dragline! Must take a few cartridges of grease to keep that old girl swinging 😀🇨🇦🪝🏗
@lozarok Жыл бұрын
just a few
@captaincope43034 ай бұрын
Who else thought it'd be nice getting the old cables for a hundred things?
@petrstuntbiker8852 жыл бұрын
Wow,reálky big Machine 👍💪💪💪✌️
@RicamezzomoGaucho3 жыл бұрын
very cool this video won another subscriber💪💪🤝🤝🙏🙏
@KarasCyborg2 жыл бұрын
How much money is lost per hour while that bucket is down?
@lozarok2 жыл бұрын
18 K
@ronaldmolinasandoval18493 жыл бұрын
Saludos cordiales desde Sudamérica Santa Cruz bolivia 🇧🇴 👍 increíble el tamaño 💯 puntos de esa maquina por mi país no se ven estos tipos de maquinas increíble 👍👍👍😀👍👍👀👀👀😁
@miklkiton8639 Жыл бұрын
Great video, very interesting for city dweller! ))
@citizen236064 жыл бұрын
Probably one of the only walking draglines like big muskie still in operation
@andrewrees87494 жыл бұрын
U.s a has many all over the country still in use, and still being made by the various company's,
@Bigsoot73932 жыл бұрын
This is Australia mate got heaps
@ИванИванов-ф5д Жыл бұрын
Лучшая в мире робота! Работаю на драглайне 12лет.Но етот огромен.
@manishranamagar7073 Жыл бұрын
Largest dragline ever built by p&h is 9030c(160 yards and 425 foot boom), is this true?
@lozarok Жыл бұрын
I don't think they ever built it - there were plans too. There were 7 x 9020-s built however only 6 remain - Good Draglines
@jemzz25174 жыл бұрын
Damn look at the chain size. Thats must be 6inches diametre link.
@valkyries-mi2sx4 жыл бұрын
looks a lot more to me
@lotajlesche73032 жыл бұрын
А я работал на 6,5/45 „NKMZ“. Там все делалось руками, без вспомогательной техники. Ну конечно ковша был только 6,5м3
@ВладимирПаргачев-л5б2 жыл бұрын
А мы на 652ом троса переворачивали....от ковша в лебёдку....экономили....естественно в ручную...если аккуратно пользуешься
@adrtv65544 жыл бұрын
Wow big bucket
@jadilsonalvesdasilva7192 Жыл бұрын
Grande máquinas muito bom excelente profissional parabéns pelo vídeo que Deus abençoe sempre seu trabalho muito bom excelente profissional 👏👏👏👏
@Maharlikano_XYZ3 ай бұрын
4:08 Man, the sound of its engine as it roars...
@tonybutcher47624 жыл бұрын
Goes through a sacred sight like a hot knife through butter.
@richardwarries60573 жыл бұрын
Such a big crane for such a small bugget..
@juanromero65063 жыл бұрын
About to post exact same comment
@longy66123 жыл бұрын
no its not any bigger and it wouldnt be able to pull it through the dirt
@jstoli996c4s Жыл бұрын
It’s engineered that way to run 24/7 for years.
@throngcleaver2 жыл бұрын
That was fun! 😁
@SirFloofy0012 жыл бұрын
The bucket makes that dozer look tiny
@dfoltz268 Жыл бұрын
Yeah if you’ve never seen a D10…. You can at least see the truck that’s dwarfed by the D10. Then you go….Ooooohhhhh and that’s the bucket towering waaaay over the D10…. Holy shit that thing is massive!
@I_am_BiG_Al2 жыл бұрын
Imagine the machines that make that
@smashlee61814 жыл бұрын
holy shit, wouldn't want to get in the way of that swinging bucket
@jstoli996c4s Жыл бұрын
That swinging bucket would have knocked around the D10 like a Tonka toy
@mortenfrosthansen84 Жыл бұрын
Why not replace that massively deform pulley, now that it is in for maintenance?
@andrewrees87494 жыл бұрын
So the dump rope, is the short length between drag rope, and hoist ??
@mart4463 жыл бұрын
Dragline is gonna keep on dragging now. :)
@davestinson56913 жыл бұрын
Man what some massive chains an bkt
@bobw2223 жыл бұрын
Bucket is big enough to hold a D10, with room to spare. Yet it looks so small in operation.
@JayJay-sq6rv4 жыл бұрын
Good lord jesus ! I don't want that bucket to fall over me !
@lozarok4 жыл бұрын
The earth eaters sit up pretty good mate - supported with the dozer - all good
@rippitallout1493 жыл бұрын
I once had one slam 1 foot from my body. I wanted to see how close I could get to it without getting squashed to death. I found out.
@WSleeuwits3 жыл бұрын
Replacing dump rope ........new rope full of sand .great job 😂😂
@kwhite7494 жыл бұрын
I thought this might have been in Australia, and then old mate spoke up and I was like "yep, called it!"
@landtechnik4k Жыл бұрын
must be awesome to work in Tinyland
@aleksankazakov3 жыл бұрын
This is the largest DRAG LINE i've seen
@JoseContreras-w7z Жыл бұрын
Que máquina,es un monstruo de acero e iron, simplemente hermosa
@antoniocarlosbarbi15634 жыл бұрын
Vai Muito obrigado ao canal " videiras " por postar este material. Obrigado também por nessa edição não ser adicionado trilha musical. Eu acho muito mais legal quando mostra a máquina trabalhando, e o som do motor e da máquina fazendo algum trabalho.