LU stands for “Lock-Up”. It’s the solenoid that controls signal pressure to the torque converter lock-up clutch.

@KT3406E

11 ай бұрын

Yes, LU stands for lock up. But no, on this machine that port is not used. It should be plugged, with solenoids in the UP and DN ports. I have no idea why the solenoid was in the wrong spot.

@ramandbang9499

11 ай бұрын

@@KT3406Elock up is not used?

@brianpedersen4714

11 ай бұрын

@@KT3406E maybe they reassembled it incorrectly after a clutch replacement? Seeing as those look so damn good save for that one hot steel, perhaps somebody just screwed up the solenoid placement?

@FROG2000

11 ай бұрын

@@brianpedersen4714 good thing it didn't work or that socket would have destroyed the trans.

@cs-gj3yf

10 ай бұрын

@@ramandbang9499 No, never have enough speed to

I'll never unsubscribe to this channel because even if we wait months it's never a disappointment.

@christopherweise438

11 ай бұрын

Couldn't agree more.

@WCSPete1

11 ай бұрын

I second that..! Well worth the wait.

@ajs96350

11 ай бұрын

Yes, I just set the alerts for this channel.

@jds1667

11 ай бұрын

I was watching 2 and 3 year old videos here lately, and thought the same.

@Watchyn_Yarwood

11 ай бұрын

@@jds1667 💯

when you say, I don't know how much interest this video will get, I want to scream; PLEASE don't quit making your vids! Quit doubting yourself Pal. Your expression of technique & knowledge is well appreciated...even valued. Thanks again for having me and the others along.

@Watchyn_Yarwood

11 ай бұрын

Absolutely! I am hoping for a Part 2 on this project and know I never tire of watching and listening to him dissect and repair old CAT equipment.

@kenh9508

10 ай бұрын

Same here! Couldn't stop watching, hoping for a tell tale sign of failure but now even more interested to learn more about the power train as a whole!

@jdmccorful

9 ай бұрын

Ditto, keep going. Do you think that socket could have been the main problem.Enjoyed!!

These teardowns are therapeutic somehow. Not sure how or why, but they seem to add calmness and peace to interesting content.

@pauljoseph8338

11 ай бұрын

Interesting content, yes…but I get so much anxiety thinking about how the hell he’s going to get all those pieces and parts back together again…

@jamesf2656

11 ай бұрын

Not to mention the deadpan delivery..

@Watchyn_Yarwood

11 ай бұрын

Here's hoping for follow-up videos on this trans.

The sheer scale of everything is amazing. Thank you for taking the time to film and describe your work.

@kevina.4036

11 ай бұрын

Imagine the gears out of something really huge like a 797 dump truck...

@donbrashsux

11 ай бұрын

GAPO Shit 😂..Gotta luv KT

@ducewags

11 ай бұрын

@@kevina.4036 Well you could look up a CAT 175-20 and see the size of the drives for the 400 ton truck. If you want some large gears, try a shovel.

I think you’re on the right track as far as the actual transmission problems. The valve body definitely looked bad when you separated it. It doesn’t take much as you know to cause issues with any kind of rust or debris in there. Torque converter should be a quick tear down and will tell the rest of the story. I hope you decide to make a part 2 to this. I’ve been missing your videos. Good to see you back.

@Watchyn_Yarwood

11 ай бұрын

Here's my vote for a Part 2

@manuelve1998

10 ай бұрын

Yep! I’ll second that motion. The valve body is probably where I’d have started seeing that there was very little in the oil filters. They looked new!

There was one problem with that transmission, the extra tool found inside. I vote to make this a series. Cool stuff.

@einfelder8262

11 ай бұрын

More likely the tool that left the tool, haha.

@christopherweise438

11 ай бұрын

@@einfelder8262 - Yea.....that socket didn't get up and walk itself in there.

@markcohen4599

11 ай бұрын

Too bad it wasn't a 10mm.

@rodrod383

11 ай бұрын

I think it was Sparkles that left that socket in there as sabotage.....he was mad all the other men in the shop started drinking Coors Light or Miller Lite instead of bud light

@brentsmith3745

11 ай бұрын

@@markcohen4599I was looking to see 10 mm hahaha

The amount of work involved making each component and the fact it all works is incredible to me.

@davmanderstrom

11 ай бұрын

Right? Every piece of that is almost like a work of art. The fact that someone sat down at a drafting table and willed things like this into existance blows my mind.

@DMSparky

10 ай бұрын

All the old engineers who grew up on farms were way way way more talented then the engineers we have nowadays. Engineers had to put time and effort into designing equipment and had a much greater respect for how things were put together when it had to be drawn on paper and manufactured with simpler machines. They didn’t have the opportunity to quickly throw together something in CAD. Revisions took a tremendous amount of time so they thought about designs before having parts made. The corporate fucks didn’t meddle as much in shit either.

@ScarlettStunningSpace

10 ай бұрын

And R&D

@Odin33356

10 ай бұрын

@@DMSparky we have evolved into lithium miners that grow marijuana indoors just to complain about power outages and fires created by them

@santaclause2875

6 ай бұрын

Correct! The precision build of each part, the brainiacs that designed all these gizmos, it's just awesome to me. And, as far as I see.....NONE of it was "Made in China".

It was amazing to see that transmission taken apart. You save us a lot of grief and time by excluding the arduous details. Thank you.

The ability of big gear to put in like >15 000 hours of work in absolute hell conditions yet still look like new will never cease to amaze me. It seems to me that 90% of major failures boil down to human error in some way, shape or form.

@NigOleBigger

11 ай бұрын

Usually is. 90% of dozer transmissions we get, 2nd speed is burned out of them from operators trying to push in 2nd. The other 9% is first speed burning out just over time, and 1% is an actual failure

I love this channel, no stupid intro no fake drama and yelling. Just someone who knows exactly what they are doing so bada$$!

Every time I see things like this, I am just amazed by the amount of engineering put into transmissions. Simply amazing.

@bartdereu9267

10 ай бұрын

Agreed, tranmissions , for sure in bigger machines and agricultural machines are allot more complex then their engines.

@TheSerenityhuck

10 ай бұрын

@@bartdereu9267 definitely.

This type of video is why I love this channel. To see the amount of engineering, the amount of precision machining, the levels of complexity all to get one 40 ton Cat haul truck transmission to accurately shift through its gears and move huge amounts of dirt around mines and construction sites. It is a beautiful thing. And then we have our host's dry as hell well look at this shit here monolog, it's a great combination.

Couldn’t imagine the machining hours in that assembly

This Big stuff is just fascinating and very interesting. As a journeyman mechanic this is enormous yet complex. I also watch Western Truck and Tractor Repair and all of the heavy duty work that Warren does there. I've even worked a day with him. Great guy!! Thanks soooo much for going through this large transmission it sure give perspective to the work load that this equipment has to do!! All the best from Canada

@George-dy3pt

11 ай бұрын

Thanks for helping Warren out! He's the man just like KT3406E

@Watchyn_Yarwood

11 ай бұрын

He and Warren are the best. Two very intelligent men.

@bill8by5

10 ай бұрын

I agree with you about Warren, he's a knowledgeable guy. KT is on a completely different plane.

It has always been a good day when he has uploaded a new video

LU usually stands for Lock Up, at least in Allison transmissions, which is the friction clutch that engages the pump and the turbine of the converter together, making it to spin at the same speed of the engine. I dont even know if this transmission is equipped with that

I love this channel eventhough I'll never own or work on any type of equipment like this. It's just so incredibly fascinating. I just wish the content was MORE frequent. The bit about the damn crickets was hilarious.

Man the quality of every part in this thing. It certainly costs tens of thousands just to make it.

Please continue with the tear down and evaluation! Super interesting to see the 'inside' story on these machines! Thanks!!!

The durability of the engineering on this stuff just blows my mind. Also, i know enough about wrenching that i could maybe get this thing apart. But i know for a fact id never ever get it all put back together correctly! Insanely impressive how you can just do all this stuff. Love these videos

Ya, keep going. It will be interesting to actually find out why they pulled it out of service. Another great video.

Man. Idk why but I just have to watch your videos. I never owned, or never will own any construction equipment like that. But your knowledge and authenticity is special on YT so i'll always support.

“I can’t stand it. I gotta look in here.” Well said. It’s irresistible.

Please Dont Stop Making Your Videos. I have watched everyone you have posted. We understand that making these videos take a lot of time, but we will always be here to watch them. thanks for taking time out of your day to show us.

Had a really shitty day, finally sat down to eat and watch a couple videos and BAM! Made my day seeing you posted a new one! Always fascinating seeing the scale and quality of these parts and pieces that make up these amazing machines. Really appreciate your efforts every time. Great job!

I love the content you make, none of the inflated bs or sponsors you see in other videos, just straight to the point. I look forward to each one you make

I enjoy the tear downs, we all learned what the guts look like in one of these things, something I DIDNT know yesterday. We appreciate it👍🏼

You really have the perfect mindset/attitude for dealing with big equipment; respect for it without being intimidated by the scale/size of the parts and assemblies that are involved. Thanks for the video! If you make ‘em, we’ll watch ‘em.

it's amazing the engineering and design that goes into these super heavy-duty machines. Time tested.

Thank you for bringing us along. I sure hope you continue filming this series. Very interesting!

did a couple of these in school super simple and they never seem to break. would be sweet to see what actually went wrong

That eight seventy one is one thought cookie. Haliburton has hundreds, nay thousands of those engines all over the world. Great video, thanks for making it. PS, the crumple zone on the Bus was impressive! Best wishes.

@George-dy3pt

11 ай бұрын

Yes it was impressive

Great video. The only thing wrong in the transmission was a socket! It looks brand new inside, except for water. Please keep going.

Very impressive clean professional workmanship! Enjoy the steam clean standards too. Can't wait for the next bit. Much appreciated...

Thank you for another excellent video - no b.s. just solid commentary and showing how to get things done. Thank you for your time and efforts that you have taken in all of your videos sir!

Great video. I love working in transmissions and this was fascinating to me. As to the failure... I'm wondering if they had a failure and did a DIY repair where they failed to really clean anything (explaining the obvious material found at the beginning), and just replaced the frictions. That would explain the overheated steel - that was from the previous failure. They put it back together, and put the solenoid in the wrong port, then gave up when it failed on them again. Based on the yellow washer and the free socket, I'm betting this was a DIY repair by whoever owned this thing. It would explain a lot. PLEASE upload the rebuild video. I want to see this thing go back together!!!

Dry sense of humor 😂 , Best tear down and rebuild channel , keep the content coming .

Another great video, please keep going with the driveline series, the size and simplicity of the process is fascinating.

That's insane seeing the size of the clutches, steels, etc. The center support on that thing weighs more than the entire case on the 4r70w's I mess with.... just so cool to see it's essentially the same damn thing, just a helluva lot bigger. Keep 'em coming man- we appreciate it!!

I watch your videos through KZread on my 65” tv, then go to my iPad for comments and upvote. Thanks KT.

Keep it going. We need to see what the issue is, and we need to see if you move the down shift solenoid back to the middle spot. I enjoy your videos.

love your mannerisms and dry humor. don't mind the gaps in content, upload when you get q chance, we'll be here

Watching you and Warren are not only enjoyable but you two tell it like it is. And informative as well. Thanks for the lesson and a look in side. Keep them coming.

@samlee2408

10 ай бұрын

who is warren i can not get enough of these Vids

@seantatham9960

10 ай бұрын

@@samlee2408Western Truck and Tractor Repair

That was cool. Everytime i rebuild a transmission everyone freaks out like its some magical box that shouldnt be touched. Their so easy yet so complex.

Also fascinating to see only guy do all that heavy work with no fear.

As a mechanic working on Automotive applications I have to say watching somebody else disassemble a transmission of this scale gives me heart palpitations LOL love the content bud. Keep it up, it's love to see that transfer case

Good stuff! Massive Transmission...all seemed clean, no bits and pieces other than the fine glitter, at least there weren't teeth of gears in the bottom or something! Definitely tear into that bad boy...loving seeing heavy equipment internals and stuff Keep em coming!!!!

“I’ve taken this entire transmission apart and there’s nothing wrong with it” I fucking love it. You put out some of the best content on KZread

I am still surprised there aren't a couple million subscribers to this channel ! His destruction videos are epic. But the teardowns of this big machinery is beyond compare ! Speaks in clear calm English . I look forward to every video on here ! 🌵

Never a dull video from you and yes, you do know what you're doin'

It’s amazing to think about the massive amount of torque and pressure that unit is under during use. Someone stuck with a loaded truck can grenade the entire system. Nice work.

@GS-zv3qn

10 ай бұрын

You would think it would be designed to not break anything if the wheels can not turn, that transmission sure looks complex,Andrew Camerati bought a wiggle truck and it had a bad transmission so he sold it and bought another truck that works,lots of electric stuff on those to control it, a manual one is much simpler but I think all those are auto so no choice but to have go auto unless real old ones were manual

A new KT upload is a great day

These pressure washings he does are oddly satisfying!

never stop making videos ,we will wait months for your next one, also that’s some amazing engineering ,thanks for sharing

What a great video. This gave me flashbacks of working at a farm implement dealer in the late 90’s. A Powershift transmission sounds simple until you start tearing them apart and have parts scattered across the shop. I appreciate the no nonsense commentary. I especially liked the Cricket comment, I’m sure some people would think you could control the cricket’s chirping. That looks like a bunch of expensive parts if you had to buy them from CAT. Looking forward to seeing the rest torn apart. Thanks for taking us along on the adventure.

Your content is really enjoyable to watch. It's a nice slow and relaxing pace with a person who knows what he's talking about. Its a nice learning experience. Your doing excellent Mr. Please, if you can, keep up the amazing work.

This guy has skill. No bull crap intros No crappy music No unnecessary stuff Just plain and simple. Not to mention he’s a CAT WIZARD

fantastic content, (to me)!! "I" would be alarmed at putting all that back together, he is so nonchalant, comes with years of experience, and thorough too. THANKYOU😊

Hi 👋🏻 buddy. I’m no engineer of any kind but love engines especially trains 😊 I find your tear downs very interesting and your sense of humour makes it perfect 👍🏻 Cheers Stevie 🏴󠁧󠁢󠁥󠁮󠁧󠁿

Most educational tear down channel in my opinion

Please keep going with the videos on this machine. Maybe we'll find the failure.

Very cool. Its great to see inside these big machines. Great organization too, with so many pieces it would be easy to mix stuff up.

Would definitely love to see more tear down on this unit! I’m no machinery guy but I really enjoy your videos!

Man that is so satisfying to watch the power washer clean all that grime off. These things are beast, I could never imagine rebuilding one, which is why I love your videos.

You said Shaft so many times, I started singing your theme song 🎵. “Who is the man who checks the planetary gears and sets. KT3406E! You damn right!!!!”

I know zero about these big beautiful machines, but I am enthralled by your vids. Love your sense of humor too. Thanks for sharing!

God bless. Mr 3406 is back to entertain us all

Stunning to acknowledge the brilliant minds that design machinery like this. Through much trial and error, over many years, the final product is put to use. To think every single piece, part, component had to be designed, tested, by someone, not some computer, is awesome.

LU = lock up If the Converter has a clutch in it, that solenoid may be to control it. As an automotive transmission rebuilder I am just guessing. I found this video super interesting ! appreciate all your other videos !

Keep doing the tear down! It's very satisfying watching you take things apart, explain how everything works and ultimately finding out whats the root cause of the issue. I'm all for seeing you tear everything apart, even if there's nothing wrong with it.

Thanks for taking the time to post up these videos. They mean different things to different people. I for one like to listen to your dulcet voice and no bullsh!t take on life. Reminds me of the old folks from the Okie branch of my family.

You found your long lost 10mm at 14:24!!! Long time subscriber. Like many have said, great chan. Always brightens my weekend when you post. Thank you.

That's where my socket went! Just paying it forward because I found a 8mm one in the oil pan of my old Toyota 20R once.

KT, if those are anything like a normal automatic, those clutch disks do NOT appreciate water AT ALL. They will come off what they are mated to. Also, when you replace them, I recommend you soak them in fluid before installing them in a clean unit. Soaking them will bring them to their standard, in-use, stack height, so you can get your clearances and stack heights correct. I would also check the book for all of those load springs to ensure their heights are within spec. When you are looking at the planetary gears, check them thoroughly to ensure the load washers between them and the housing are still in good shape. I bet those are fairly costly to replace if they are bad. I have watched you while assembling something and you are exceptionally particular with cleanliness, this is one crazy aspect where that OCD is well worth it my friend - surgically clean is best. (LOL) I really appreciate watching what you do - KEEP 'EM COMING!!! (Looking forward to you and that valve body)

With all the crazy madness in the world going on now, its calming to watch your videos.. Thankyou .

I hope you never quit making videos they are awesome buddy

KT... love your stuff! You are brillant beyond your years and without any formal training or mentor... Truely outstanding. I have watched every video and I will continue to do so. When my long awaited ship comes in, I will commission you to build me a 3406.

it just turned into a good day thanks to KT 3406 E

You are the bravest man on KZread this week!!!! Amazing engineering! ❗❗❗❗❗❗❗

KT3406E, I really appreciate all Your videos! I always learn something new every time I watch Your videos! Even tho I don't do a lot of work on this type of diesel equipment, its always interests me how they work and operate! When it comes to this stuff You are the best of the best (IMHO) Thanks so much for sharing this with us and look forward to Your next video! Cheers DC.

the metallic particles you found at the start are perfectly normal for a transmission of that size, as long as it is "dust" and not "needles" you shouldnt worrry about that. every piece looked brand new, im willing to bet that's not where the problem is, if there is any

Another great video! It always amazes me how unbelievably complex these transmissions are!

Such an awesome interesting teardown and most importantly somebody who knows what they are talking about and doing, thank you Sir for your time and effort, I am in here for the long haul

Great video it’s amazing these engineers can invent stuff like this but can’t make anything easy to work on lol 😂 love watching thanks for sharing

Them clutch packs look brand new! Awesome job, great video! Please keep posting more videos!!

I agree with others here. It is never a disappointment. Always interesting. We all learn.

Wow! 7.2k views in 3 hours!! Dude! Way to go. You're definitely doing everything right.

I always enjoy your videos. You are probably one of the best out there.

You make it look so easy.great video as always. Definitely ready for the next one. Crashes,burnouts and major plant rebuilds. Best channel out there...

Awesome video. I can't believe how good that transmission looked after years of abuse.

Another outstandingly brilliant video from the channel, the methodical process of the teardown with detailed and informative commentary is what makes this channel so awesome and popular. Keep them coming young man! 👍🏻

Your videos are never a disappointment for people who are interested in heavy machinery and how it works .

Kt3406e's teachings are always excellent!

The wait is always rewarded. All your videos are excellent KT

Thank you, please continue the "series". Your videos are always a pleasure to watch. And that black humor of yours, priceless.

You always get to the heart of everything. no stone unturned very interesting.

Once again you took the time to show me something I knew nothing about. Great stuff- thanks. You're always concise, articulate and easy to understand. Anyone taught by you would be lucky.

I would love to see more videos like this on the hauler truck!

By far my favorite KZread channel next to ZTNBP.