BOLTR: Hydraulic Steering | Reading Fluid Schematics

We tear into a Bulgarian Beauty to see how the schematic relates to the construction. This is a hydraulic steering valve off mining equipment.👉 T-Shirts teespring.com/stores/ave
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[@MattsAwesomeStuff]

I'm going to be honest. I watched the whole thing, but you lost me a few minutes in. I picked up maybe 25% of what you said and, fuck it, y'know what? 25% is more than I knew yesterday and ain't bad for something I don't really care about except to watch someone else go through it. 3 years ago I didn't give a shit about glass reinforced plastic, sintered metal gears, friction stir welding or overbuilt and underengineered juice jerkoff machines. Sneaky fuck that you are slipped it in while I was distracted and taught me about them all the same. You're a modern day Mr. Wizzard.

[@TheOlsonOutfit]

I felt the same way on the 9 wire electric motor vidjeo.

[@alexwang007]

well, FACK'N SAABSCRIB!!!

[@dattepo7534]

MattsAwesomeStuff that’s me most of the time when I️ watch his videos

[@fishfuxors]

Good for you, Sir! Far too many idjits (Looks at the down voters) come here, look for a minute and say "boooooring!"

[@gc7782]

very well said brother.

[@darrenstoughton3618]

Ive been doing mechanical/electrical work for over 20 years and I learn things I didnt know from your vids. Just goes to show you, you never know everything. The world is a bottomless pit of knowledge. Thanks for the learning of things buddy.

[@brumpchelichka]

And here I stand in Sofia, Bulgaria, in the middle of the night wondering... we produce stuff like that?... we are probably good at it?... My heart fills with national pride, my good sir! Thanks for the educational vid!

[@SergeiFragov]

Dobry Dobrev True that.

[@antonstanchev7041]

Имали сме много добро производство по време на комунизма,общо взето и малко след това,до 2000г. мисля че беше,докато още имахме Кремиковци също така. Но наистина като,видиш нещо подобно,вдига се националното самочувствие в сърцето.

[@user-ve5is3rf3q]

То чувство, когда не зная Болгарского понял всё о чем сказано в сообщении.

[@franknewling1139]

You should feel that way. We used to have that Pride of Workmanship here in the US. Now we have a bunch of kids with smartphones stuck in their faces and the others are too lazy to do anything but collect Welfare from those of us who do work!

[@jesusisalive3227]

@@franknewling1139 We are slowly getting our manufacturing back. I pray it continues!

[@Sketch1994]

Bulgaria is actually one of the big machine tool suppliers to my country and they are considered to be some of the most stout and reliable machines. I have a great experience working on one and the machinist I go has the same in his shop and he's very proud of it!

[@ramosel]

Somewhere in Bulgaria there is a little man who works in the factory who is watching this video and laughing his ass off....

[@mightygrom]

Thank you for doing the hydraulic vids.

[@mef9327]

Great vid and I'm really looking forward to the build vids. I've had some projects I've wanted to to do for a while.

[@colinantink9094]

Yes!

[@erienwhite]

The check valve between LS and P is a signal check. It is what tells the pump to "stroke up" or increase flow. In the future, if you take one of these apart with the intent to re-use it, put timing marks on the slices first. If assembled out of time, it will do nothing. Oooor, at first steering wheel input, become a strong/wrist breaking motor.

[@zachhall9349]

Spent 8 hrs in a construction hydraulics class and learned more in this video then the whole damn class. Keep up the good work.

[@svetko05]

Greetings from Bulgaria. We manufacture a lot of industrial machines and tools, although most companies are not bulgarian.

[@primyv]

We have this kind of orbitral valve on our tractor (and yes it's from Romania), the built in pumping element allows you to steer if the pump fails/engine isn't running. Also if there is a leak, there is a small one on ours, you need to slowly rotate the steering wheel in on direction in order to go straight :)

[@blasebermea3493]

Exactly what I had in mind😉

[@danwolf307]

I had a Case 580D that was the exact same way!

[@mrclubike]

Mr AVE you need to look at that hyd schematic again The pumped oil comes in the the gear goes thru the valve then thru the internal pump out of the internal pump back to the valve then out to the cylinder back from the cylinder thru the valve then back the tank That spring aligns the inner and outer parts of the spool when in neutral position when the steering wheel is turned The more force that is applied to the steering wheel the more the inner and outer section go out of neutral and more oil flow is applied to the inlet of the internal pump That internal pump is very important and regulates precisely how much oil goes out to the steer cylinder The internal pump has all of the oil that goes out to the cylinder running thru it So if the power steering pump fails the internal pump can became an emergency pump driven by the steering wheel (300lb gorilla)

[@maxtheminimum8612]

The gerotor assembly acts as a metering device. The oil goes through the valve and must first flow through the gerotor before going back to through the valve and on to the steering cylinders; the oil in the return side of the cylinders would then go back though the valve once more and then back to tank. In order for oil to continue to flow into the cylinders, that gerotor has to spin which mean the steering wheel has to spin. If the 200lb guerilla at the controls stops turning the wheel, the valve centers, flow through the assembly stops, and the steering cylinders stop. In addition, as others have mentions, the gerotor assembly can be used as a redundancy system to still have steering in the event of a failure; depending on the machine, that may be easier said than done.

[@jackcolby9383]

More vids like this it never hurts to go through a schematic layout while showing real world items this really helpful

[@lenlabrie4487]

YES! Wake up on a wet coast Saturday and find a new AvE video! Life is good!

[@arduinoversusevil2025]

+Len LaBrie Best Coast!

[@bijibijmak]

Wish I had watched this video before I had taken my first hydraulics class. You explain the basic stuff that professors won’t teach because “everyone is supposed know that”.

[@GTsportscar]

HOLY MOLY. I worked as an electrician for 2,5 years. After that I went back to school to study electrical engineering. But i could never really wrap my mind around how Voltage and current were related to each other. Ofcourse i knew how it worked and how to use the equations, but as a visual thinker i could never really see it. But after you said "pumps create flow. pressure is a by product of the restriction of flow." IT FINALLY CLICKED!!! 6 years it took me, never could I really understand it, but finally. oh man what a relief :P Thanks

[@bryandrap123]

As an electronics guy, and being a visual thinker, I always use fluid systems comparisons to logically troubleshoot and explain circuits. So many people I work around even the engineers just internalize Ohm's Law but have no idea why the equations work out the way they do. All you have to understand is that Pressure is the product of Flow and Resistance to flow... Voltage is the product of current flow and the resistance to that flow... V=I*R. I love this channel because it isn't just a guy trying to show his knowledge with fancy equations and material to memorize, he actually understands the real world.

[@upon1gsxr600]

I run equipment every day for work and I would like to think I have a better understanding of hydraulic systems then the average joe. I’m going to absolutely love these hydraulic videos. I know fuck all about electrical and I have learned a lot from this channel. Can’t wait to learn something that I may actually use day in day out.

[@mausball]

Thank you AvE! Hydraulics are one of the things I've been trying to understand since forever and haven't managed yet. This kind of presentation makes it sooooo much friendlier for this professional pixie wrangler.

[@deezelfairy]

Called an orbitrol valve here in the UK. Don't put one back together wrong! If you do as soon as you move the wheel it will whip round at full pressure and break your wrist! Always thought the cleverest feature is the way it reverts to a hand pump when there is no oil flow to the unit.

[@CyberlightFG]

deezelfairy I really tried to understand what you have written, but I can't.

[@deezelfairy]

Frank Gormanns If you get the porting out of alignment when you reassemble it it turns into a motor! Seen it happen a couple of times

[@CyberlightFG]

deezelfairy You can only steer it twice, because yo break your wrist. Understood.

[@deezelfairy]

Frank Gormanns yeah summit like that....

[@bullfidde]

Here in sweden we call it an orbitrol too. :-)

[@gordonlawrence4749]

I'm an electronics engineer so I have no idea why I find this stuff so fascinating. Part of it though is definitely the presentation.

[@johnbrown3295]

God damn man. Thanks so much for taking the time to explain hydraulics. The angry pixies were a mystery to me until you helped me out. Really looking forward to understanding the black magic that is hydraulics.

[@CyberlightFG]

It seems, it's almost the same.

[@rustyshackleford8086]

I love when AvE gets really excited about a part

[@Contango1000]

Fascinating. Had no idea they were that complex. Love it.

[@Flynntastic]

I would bet many people would like an AvE dictionary. Elechicken - (noun) One who's mastered angry pixies. Confuser - (noun) An angry pixie device able to process data too big for you noodle tube. Schmoo - (noun) Lubrosity compound Etc Etc

[@flymypg]

How did I not know about AvESpeak? Why is this not available as a language option in Google Translate? Just noticed it is incomplete: Canukistan isn't defined as a place where violence is replaced with French-accented apologies.

[@Flynntastic]

This made my day!

[@tomrauner]

FYI, there's also a public google doc which probably gets updated more frequently than AveSpeak docs.google.com/document/d/1-_b2m8brkZ3SftLiqO-O-noAJATZixfMfxmTT_kjoEw/edit?usp=sharing

[@MrBruce-np9rj]

"Comperstand" I think is a new one....

[@JanBabiuchHall]

BobC or dildo beatings on the roadside

[@TrojanHorse1959]

Excellent video! I manage to learn something new every time I watch one of your videos, THANK YOU AvE!

[@imthesquareroot6125]

Thank you good Sir , I'm looking forward to this series as I know very little about hydraulic systems.

[@shurdi3]

One of the few production companies that survived the 90's It's an interesting story of how Bulgaria goes from one of the major Industrial Producers in the Eastern Bloc, to the majority of the factories being privatised and sold off so that people can retire and leave the country.

[@jackhines255]

thanks much looking forward to the next one

[@kellyhickman2251]

Brilliant break down. Thank you!

[@harveysmith100]

Still saving for the FLIR. Watched a mechanic on youtube diagnosing problems on cars. Brilliant tool. It's almost like having Xray specks. Good for properties too, heat loss etc.

[@coles201]

You Sir, are a Hero Sir!

[@sanjaydubey9973]

Thank you

[@travisflannigan3227]

Lol I machine those parts (the main casting) in the good ole state of Minnesota!

[@thoughtsy]

Thumbs up for the Bulgarian Beauty!

[@gromett]

Thanks Ave. Seriously looking forward to the Hydraulic lessons so I can understand this stuff...

[@brucecollins5103]

Outstanding explanation!! Particularly with respect to the Load Sense circuit.

[@Forseenlife]

Thank you for this video man. Much appreciated!

[@martinxXsuto]

Uncle B going all technical about valves with the phone charger pencil I couldn't have imagined a better sight when i came home

[@aceroadholder2185]

The valve body on a Hydramatic style transmission is a mechanical computer. It evaluates throttle position, input rpm, output rpm, shift selector position and gives an answer to the transmission of: 1,2,3, or 4.

[@StreetbeatDesigns67]

Resistor pencil lives lmfao

[@colinantink9094]

David Miksch I was wondering about that notch!

[@StreetbeatDesigns67]

it took me a second to remember it too lol

[@gabepence1018]

David Miksch I'm seriously impressed he's kept that pencil that long. I cant even set one down and rember where i left it

[@RobertL78]

Finally, a video where I knew what everything was ahead of time.

[@Flymochairman1]

Power steering has always baffled me. Nice explanation. I used a hydrauliclly driven Wet Feed Machine on a farm and when they needed servicing or broke down, it was a nightmare best left to those with oil-stained hands and not shit-covered farm hands(Hydraulic oil, the other thing that sticks to blankets) Once ya figure where all the ball bearings and springs went, it's fun. Always, just beautiful finishing on the internal moving parts. First job with hydraulics:- On disconnecting the pipes from the ram, neither I nor my journeyman thought twice about what was gonna happen when the sleeve slid down. After the warm oozing feeling running down our hair, necks and backs, we realised we'd opened and lifted the wrong end. I was washing Hypoid out my hair fer weeks! Apprentice follies!

[@mikeshearn8925]

Very well put.

[@KK19825]

Oh man...this brings me back a lot of memories. Being the pixie plumber I am - I found these quite easy to learn since these schematics aren't nothing else but circuit diagrams for hydraulics (HYDROLIKS in my native language) with VERY intuitive symbols (for the most part). The thing is you don't need to know everything. If you know what the system does, and you know most of the symbols, you can EXTRAPOLATE (Lisa Simpson vocabulary) from there on out. Really good and informative Vidjayo. Thumbs up from me!

[@sHoRtBuSseR]

30 minutes into my Saturday and I've already learned something

[@leespice12]

16:36 made me chuckle, love the tappy tap tap

[@plkracer]

Mr. Chris, on the char lynn units, the spool pushes the fluid through the gerotor, then to the appropriate cylinder, while venting the opposite side of the cylinder. There isn't a perfect link between the steering wheel and the control logic, so the gerotor pushes the spool to the next cog, which is the neutral position on the spool diagram. Everything is now blocked off again. The gerotor also provides haptic feedback for the operator, due to the flow through the system. The spool valve and gerotor turn one notch each cycle of the system, and passes a small amount of fluid each time, which is metered by the gerotor. These also work without an input pump, as the gerotor provides the pressure and flow. Give that little pump more credit!

[@scruffy6151]

i had some understanding of how this worked before now i know more thank you.

[@mcdowe245]

Really enjoying these. I've worked around stuff like this. But never got a chance to tear anyone of it apart. Now I can see why.

[@MojoMfg]

Yes! Bring on the hydraulic and pneumatic videos!

[@scytherswings]

AvE you explain stuff so damn well. Thanks for learnin' me sumthin

[@kaneto88]

Greetings from Bulgaria!

[@fixitdanner]

Your videos are great!!

[@imhere5519]

Just went over this obitrol systems at school last week ( a heavy industrial equipment school). Please keep these videos coming! Good way to remember how all the doodelidoos work by watching you playing with angry pixies and these pressure lube systems Greetings from Norway by the way

[@rlund3]

I love the education!!

[@mr.h4714]

My gosh the channels growing fast...well deserved good sir.. keep it up.....thanks for all you do to entertain all of us 300lb gorrilas

[@antonstanchev7041]

Never new that it's possible to see some one talking about the country i live in and quality made hydraulic :D.Never knew that we were making good stuff like this. Your vids are awsome!!!! Keep up the good work!!!!!

[@FixItStupid]

Thank You ! Good INFO

[@cryomancer20x68]

He has something normal to point with. What the fuck is happening to this channel? This is complete carnage!

[@SuprSi]

AvE - "atap-etap-tap!" Me - *frantically finds mute button to not wake house*! Ta vm for the warning :D lol. Greets from England

[@DougHanchard]

Brilliant!

[@mrfrog3350]

The hydraulics on my hilo helped me trick my bosses into thinking I was doing work for years.

[@littlebuch]

Wohoo finally something Bulgarian!

[@Stummel01]

Normaly the "pump" is not only for feedback. With this pump you adjust a throttle valve and that adjusts the speed of turning. Because if you had adirect connection from the steering wheel to the valve the vehicle would continue to "steer" as long as you have the steering wheel not in the neutral position. If you stopp turning the steering wheel further the pump will no longer pump and therefor the throttle valve will close and the car will move on with this steering angle...

[@Stummel01]

Damn.. should have viewed the second vid...

[@spikeydapikey1483]

Thats some quality smoo!

[@sarahrock9487]

The gerotor also asks as a mini safety back up pump to allow for some control of the steering in the even of an engine or main pump failure.

[@jeffreysmith2223]

From an old time locomotive guy, all the data you're referring to sounds very much like old time air brake systems. Spent many, many hours working and troubleshooting these systems as we developed microprocessor based Event Recorders and locomotive control systems.

[@bohay33]

Friggin great vidja's

[@jonathansbitofeverything9710]

Worked at an old guys house here in Ohio that told me he patented hydro electronics 40years ago was showing me how it works blew my mind. Super cool.

[@matthart7733]

haha oh this one was chockers full of funny shit...cheers for making my arvo, please keep em coming too mate

[@YupHio]

Some real science looking diagram there

[@johnstewart7059]

I like your videos so darn much. You should be teaching the rotary encabulator

[@p.s.4777]

If not for the passion of it all and the wealth of humble knowledge. Then I would be totally content with just taaapy tap taap ! Hell yeah

[@bertus76q]

Nice video, just to add, the hand pump in the bottom is to have functioning steering in case of hydraulic power loss and the flat springs are there to have a little play so the steering has a delay when the wheel gets turned, so it's not as sensitive.

[@oddy297]

Love ur vids like the intro

[@stevefixit1526]

that 'pump' as you call it is a metering unit the spoolvale ports to the 'pump first and then to the cylinders so the oil dislaced is propotional to steering wheel rotation it only works as a pump in manual mode for emergency but good luck to that on large vehicles

[@carrollmcpherson4530]

I think this too! a little more going on than he is realizing or remembering. If it was just a resistance element, why would it be harder to turn (impossible generally in large equipment not in motion) without the engine running and pump flowing? and of course, the pump needs to know the approximate position of the cylinder.

[@deezelfairy]

Indeed sir, in heavier stuff it's impossible. I'm a forklift engineer and with trucks up to about 7 tonne capacity (dead weight 10t) it's just about possible. I looked after a volvo L50f loading shovel for a few years and that had a tiny emergency 24v power pack for steering with a dead engine.

[@Youtubeforme88]

@AvE i dont understand a lot, but i like it anyway.

[@jasonthompson869]

Ah... the mighty Orbitrol !! Finally something I recognised but new bugger all about as to how they worked until this vijayo!! According to ol’ mate in the workshop if you don’t know how what you’re doing reassembling / timing them they’re a bastich’ !!! Thanks Ave !!

[@irwin952]

Lunchbox sessions Carl explains hyd steering awesome ... but there’s something to be said about actually seeing real parts thanks again aVe

[@mattobermiller5041]

I LOVE Lunch box sessions! Just started getting into hydraulics and they've been extremely helpful but Ave's explanations with the part in hand makes a HUGE difference.

[@tabbek]

Try making a copy of the spool, cut it out, and physically slide it back and forth on the paper. Can help with figuring out what's going where, and when.

[@teslacoolguy]

If you were the professor in my fluid power class, i would actually stay awake during the lectures.

[@andrewleece5076]

The pump in the base is a safety override for when the engine shuts down/hydraulic pump pressure fails. It allows for the ability to turn the wheel when the machines off

[@Femmpaws]

Oh yeah had a couple of units like that apart in the past... they were made by Char-Lynn... It took over three hours to replace a two dollar O-ring to stop them from leaking.

[@deezelfairy]

Kriss Femmpaws In the forklift industry we find its normally more cost effective to just throw them away and fit a new one. BAD things can happen if you put them back together wrong.

[@Femmpaws]

Oh I understand but when you are working on stuff 45 years old at that time, getting a direct replacement part was costly

[@kenseastrand7428]

I am getting ready to work on one of those, it looks identical! This one goes on a marine travel lift that hauls out 90 ton boats. I will let you know if I figure out anything cool that you did not find yet. great video buddy!

[@Frost640]

No mom, I can't take out the garbage, I'm learning with Uncle Bumblefuck!

[@75ohmHAM]

Your insanity keeps me sane, please don't stop ever doing this

[@kphillips7922]

Heat of the meat ,angle of the dangle.all good advice for my up and coming job interview with hitachi.

[@TheUberGopher]

The springs re-centers the valve and return it to neutral. And gives you a feeling of feed back, the harder it is to turn the machine the more you have to turn the steering wheel against the centering springs. The harder it is to steer the harder you have to turn the steering wheel. Pro tip? Don't hook the lines up wrong on any steering gear, you can turn the the steering gear into a motor and it will spin the steering wheel with great force. Never reach through the spokes of a steering wheel when starting a machine up after fooling with the steering lines. If your arm is in there you won't like it. The small 'bleed off line' is also to flow a bit of oil through the valve all the time which keeps the valve warm in cold weather. Without it the steering gets very stiff when not doing a lot of steering. It takes a bit of time to get a hydraulic schematic completely loaded into the old coconut some times.

[@bubbadahut9639]

the real reason you make these videos is to entertain us with the commentary and edumacation. The extremely close second reason is to figger out how to put the schmoo back in the same way you un-putted it. with greater than 25% chance of it working again.

[@rickfreeman7892]

AVE you should go into how that rotory valve works. how it allows the steering wheel to hold a position so that when the wheel is turned it stops steering causr its pretty cool the first time a person figures how that. Also in certain open center systems they will use closed center valves and use the load sense to operate main relief valve

[@cylosgarage]

I wish it was as easy to get you to give us a shop tour as it is to get a hydraulics video ;)

[@georgeblind1238]

The relief valve in the load sense line is the pressure override value, if the steering wheel is turned to full lock and the wheel is not centered, the pump pressure will achieve the value of the setting of that relief valve.

[@billcorrigan8456]

I had a mglarsky over pressure my choocher and I got some broon fluid in my whiters.

[@albertonex19]

I've played around with these a little, known as "orbital units" as far as I know the pump meters fluid and acts as a last resort for steering if the engine or hydraulics fail. If you notice the valve is operated only within the first few degrees of movement, the springs in the middle you pointed out bring the valve back to "closed centre" so the centre of the valve assembly turns just a bit acting against those springs and the fact the whole assembly turns is just to allow the wheel input to turn. The pin running through the valve assembly is the weak point that will break by the gorilla using the steering wheel to pull themselves up on the machine without hydraulic pressure. WORD OF WARNING! If you plan to put that back together, the pump is timed, time it wrong and it will turn the pump into a motor and 300Ib or not the steering wheel will break your wrist

[@shermdog6969]

Your videos are like going to college without the large bill.

[@DJ_Dett]

Another configuration for closed center valve systems involves a variable pump (such as an engine driver pump), and a pressure-regulation valve (which is basically a relief valve with a return line to the tank).

[@fuzzeek78]

AvE, I love yer vijeo's. Fer the love of seweet jeebus, never give up the ghost, with manly plutonic love; the Fuzz.

[@MichielvanderMeulen]

The play in the shaft (11:02) is probably to prevent over defining the construction. One bearing on top of the shaft, and the other end with the spline locked in the pump, perfect.

[@Giblet535]

That there is a mechanical comparator and differential amplifier. I replaced a Kubota one of these this past summer, and I fixed the faulty one. They stop working if the sense line gets clogged with shmoo.