Dear AvE, your videos have kept me interested in engineering and thus lead me to my degree. You are just the best. Thanks for putting all the work you do into these videos, man!
I like the cavitation talk. Ive seen the end results of water cavitating a diesel injection pump quite a few times. They love to send steel glitter all through the fuel system as the pump detonates slowly.
The ISO code on the pump body is stamped "P " for pump or "M" for motor , Motors also usually have a case drain port.it would appear someone has swapped the rotation group to change direction. You have a pump in this clip as indicated by the seals on the thrust plates ,a motor is bidirectional and the thrust seals seals are figure 8 shaped .
I'm in first year HET and we just started taking little hydraulic pumps apart last week to measure the displacement and whatever, good timing for this video! Also, I think that's cool that you can flip the input shaft around in case your pump needs to be driven the other way.
As someone who lives in a former colonial outpost, the easiest way to tell imperial fasteners in my garage is by the rounded heads from using metric tools on them...
Another well tested method. Eyeball the fastener, and select the tool you are absolutely certain will fit it.. if you selected metric.. it will be imperial... and if you selected imperial it will be metric. Uncanny.. works every time for me.
Got a university report on gear pumps and was getting bored of my tutors long winded vijeos without any swearing. Glad I remembered you made a video on these!
Glad you mentioned cavitation. Put your hand underwater and move it from one side to the other really fast. A vacuum pocket will form behind the hand that you can easily see. There's no air in there, but it is a cavity. I have also seen the inlets being pressurized to reduce cavitation. The highest I saw was 100-PSI, and that was on a 3000-PSI system. Great vidya, my friend...
Love these vids. I'm not a mechanical engineer or anything (just a web app developer), but I love watching technical stuff and learning. I work on my track car, so I guess this sorta falls in line with it. You're seriously the first YTer I'd consider giving to on Patreon.
Moe7404. i worked industrial hydraulics for 20 years. now retired. that demo was the best that subject could EVER be done. the part about pump or motor is a point that even a lot of people that work on them dont even understand
I to work in the hydraulics industry and it does catch a lot of people out. What he stripped down was actually a pump tho because of the 2 different sized ports and the kidney plate seal only sealing off the high pressure side. Some pumps like commercial brand actually run a full seal around the shaft like a motor has but the ports are the give away.
Ist a one directon motor wich needs the sealing only on the higpressure side an a lekage flow from the bearings spots to the Tank side The actuator is labeld as a Motor also Greetings from germany
I never really thought about the details of a gear pump and falsely assumed that the oil goes through the middle part, but had been wondering how it would do that as the cavity is pretty small there. Doh. That the oil goes _around_ the outer diameter makes much more sense. #TIL. Your vijeos are a source of interesting information. Skookum as frick. Thanks!
never thought about it until seconds before he was explaining it, but I too assumed the flow would go through the middle. which makes absolutely no sense in retrospect
I always imagined the closing in teeth would pressurise the oil (although the oil doesn't change in volume very much at all unlike with compressed air) with some leakage but yes going around the outside makes more sense.
The cut out pieces on the gear side of the bearing holder only allow oil to escape back out into the side of the pump that it came from. Because the groves don't break into where the bearings are. The groves on top do look like they allow the high pressure oil into the bearings. I think this makes sense because if the oil was flowing in and out of the bearings it would not be at as high a pressure. Also I love your channel, and I wish I had lecturers like you at uni.
I was always under the impression that hydraulic motors had the same size ports on either side, so that the motor would spin the same speeds in either direction. Then hydraulic pumps normally had the larger size for suction and the smaller size for pressure, depending on the application.
I am a mechanic for a company which specializes in truck mounted material handling loaders (primarily logs) ran completely by a gear pump mounted to an eaton pto on the underside of the truck transmission and driven by the input shaft of the transmission, typically when we see symptoms of a tired pump we only replace pumps, not disassemble and repair. This vidjayo defintely helped me understand a little more of the witchcraft that goes on inside these pumps
Great video! Could you possibly do a video of the internal workings of a hydraulic pump/motor and how it transitions between the two functions? Thanks!
Your videos helped me fix my ingersol-rand impact now its helping me understand pto’s that i work with daily better. You got one for everything dont ya
Those pumps are designed to wear into itself. The gears eat into the housing at break-in making its own clearance. You will always see wear in the housing. The wear is on the low pressure side. High pressure pushes toward low pressure. If the wear goes past the housing locating pins to the high pressure side it is worn out. If you replace the bearings, you reset where the gears are at in the housing and you have internal leakage. Thanks for the vid, sorry my comment is a year late.
Only positive displacement pumps create flow. Centrifugal pumps create pressure. Correct me if I'm wrong, but I'm fairly certain, and this makes intuitive sense when considering the high clearance provided in most impeller pumps, and the low clearance in positive displacement pumps like gear pumps or reciprocating pumps.
Upon seeing the Craftsman wrench, I had to go into the toolbox for the crucifix and hold it up to the screen. Thoroughly shaken, I then called my Snap-On dealer for further support.
yeah and when she breaks and the guy doesn't show up for a month. fuck that! nawh any way if hes like most of us here hes probably got at least 4 11/16" wrenches. Plus the ones hes had to fuck up to change that one hose jammed up at the back to the valve body some some obscure obsolete machine.
Put my 48 Ford 8N into a tree stump, cracking my loader pump case earlier this year. Had to self learn everything you just showed. This filled in some lingering gaps of knowledge from that day.
Thanks man. Very in-fkn-formative. I had to replace the oil pump in my car about 20 years ago and for whatever reason I thought about gear pumps and watched your vid. Great job, good info.. Thanks again.
Great video, your ability to explain relatively complex workings is second to none. I was going to ask your option on a brand of tool the other day and bam there it was, what do you think about porter cable?
"Before I was rudely interrupted by the truth" has to be up there with one of your best lines. Copyright it quick before it becomes a US presidential campaign slogan.
What drives hydraulic pump and the pump creates pressure, that pressure is determined by the circuits resistance to the flow of the oil passing through it, where that occurs determines the nominal (required) pressure, and the max or stall pressure. The resistance in the lines orifice fitting filter or valve will determine nominal pressure (the pressure that occurs in the lines when the force driving the pump meets the opposing force (friction) enough pressure builds up to either overcome the resistance or bypass the circuit through the relief valve, of the system is functioning as intended then the H/F starts to transfer the pumps mechanical input to the motor, (pressure and flow) setting the motor into motion and the fluid into the return line.
I keep waiting for the day when I'm going to need something I learned here at work. I work in the wireless internet industry, so there's not many hydraulic pumps and such, but some day!
That doesn't sound right - the effect should be dependent on the vapor pressure of the fluid. The bubble collapse does occur at the fluid's speed of sound, though.
@hans the speed of sound waves differs among different materials. high density materials transfer concussion waves faster than low density materials, hence the speed of sound is faster in water than it is in air. grade 4 science ftw
let's do some math, speed of sound in air 340 m/s , a pump gear diameter 25 mm (a big pump )and so 340 /(3.14 *.025) * 60 = 259 872 rpm if you divide that by 1500 rpm or 1800 rpm you find that it is around 173 ~ 144 fold just saying .
@fawzan if I'm reading this correctly I think your reasoning is flawed. you're assuming speed of sound in air, at sea level, through the gear. what's flowing through the gear is oil under negative pressure. as AvE said the oil can boil, now I'm not an inganeer or a math magician, but it stands to reason that the density inside the gear is very different from oil at 1 atmosphere of pressure. now I have been wrong once or twice, and could very well be again, but my previous point was to explain "speed of sound of a fluid".
Absolutely. I am not any kind of engineer, and I learn a lot from his vids. He drops gold nuggets of information without even knowing it sometimes I think.
They might have explained it just as well in high school but, at the time, you no interest or little experience in the topic. That is, the teacher's ability to teach isn't that much different from AVE but you, with your age and experience, are different.
After hearing you talking about pressure and flow, I wish you would do a few videos just on the basics. Kinda like what you would see in those old education film from like the 40's. Because without a doubt you're knowledgeable enough to get the info right, and I feel you would easily be able to put it all in layman terms.
Very interesting. From the automotive mechanic side is always throught it squeezed through the middle. This makes more sense now that i see you explain it.
Wow.. Thank you very much for this informative video ... it helped me understand so many things, and now I can reassemble my micro gear pump for the 1/16 Hydraulic wheeled loader :) ... Awesome Video !!
Excellent, I have been trying to figure out why my pump wont build pressure and heats up quickly, after reversing the rotation I didn't get the excess fluid diverter in the correct orientation, works great now, thanks!!!!
@6:50 the seal needs only one lip to seal the second seallip is for dust. The Most Motors have a leakeoil port the Port is for reversal use in this case the motor can only be used in one direction
thank you so much for your help, u taught me so much I needed to know if a pump could run either way all I have to do is flip the gears wow thanks again
Dear AvE, your videos have kept me interested in engineering and thus lead me to my degree. You are just the best. Thanks for putting all the work you do into these videos, man!
Good work m8. Gratz on your degree =D
Cheers to that. Very cool you found that inspiration
Same story with me but ima machinist 🙃
Hahaha, I laughed way too hard at the click of the tourque wrench. I'm guessing you tourqued it to FT (fucking tight)
Jeff from elderly iron has the same torque wrenches...
me too lol
It took some learning growing up to stop at that click before the fastener said "Ting", and my knuckles chimed in.
FFT. That's Full Fucking Tight, for you. Any tighter and you get stripping.
GOOD-'EN-TIGHT. Yah .
I absolutely love these kind of videos. Nothing beats the hands on explaining. Please keep these up!
Impeccable explanation! And I love how you stress the flow/pressure distinction.
I like the cavitation talk. Ive seen the end results of water cavitating a diesel injection pump quite a few times. They love to send steel glitter all through the fuel system as the pump detonates slowly.
11/16 wrench on a metric bolt. Never change AvE...
ha..it is a crapsman wrench tho
Just 0.46mm too large, doesn´t matter that much on 12.9 bolts, they´re hard stuff.
If the Crapsman dies on it, who cares?
Wasn't a wrench it's a torque device....lol
I use 3/4 for 19mm and 5/8 for 16 all the time, call me a rebel.
it's 11/16 of the proper torque
The ISO code on the pump body is stamped "P " for pump or "M" for motor , Motors also usually have a case drain port.it would appear someone has swapped the rotation group to change direction. You have a pump in this clip as indicated by the seals on the thrust plates ,a motor is bidirectional and the thrust seals seals are figure 8 shaped .
You have a great deal of knowledge telling the difference between the two. You should have a CZcams channel.
@@dukeman7595 I run a hydraulic repair business.
I'm in first year HET and we just started taking little hydraulic pumps apart last week to measure the displacement and whatever, good timing for this video! Also, I think that's cool that you can flip the input shaft around in case your pump needs to be driven the other way.
Aliminyum , ana gövdeyi ters cevirmesi gerekir , yön degişikligi için
As someone who lives in a former colonial outpost, the easiest way to tell imperial fasteners in my garage is by the rounded heads from using metric tools on them...
Another well tested method. Eyeball the fastener, and select the tool you are absolutely certain will fit it.. if you selected metric.. it will be imperial... and if you selected imperial it will be metric. Uncanny.. works every time for me.
If it's an American car either might fit, if it's a Japanese car metric tools will fit but you hands won't!
Hey... let's all switch to metric! And let's put the steering wheel on the left side as well, while we're at it!
I've never even considered engineering until i came across your channel a couple years ago. Glad you can share joy of machining with us common folk.
I learned more in 10 minutes regarding the workings of a hydraulic pump/motor than I ever did watching CZcams videos.
Your hydraulic videos is how I discovered you, your infrared heat gun trick is worth its weight in gold. Keep up the great info.
This video given me the exact knowledge that I need to know now a days for my project. Lot of thanks for uploading such a brilliant effort.
Just picked up a little scrap honor pump from work that I'm gonna disassemble and attempt to fix. Your videos definitely helped get me interested!
Aliminyum ana gövdede çizik varsa o pompa ölüdür , bogaz keçesi yada gözlüklerde, keçelerde problem varsa belki kurtarırsın pompanı .
Got a university report on gear pumps and was getting bored of my tutors long winded vijeos without any swearing. Glad I remembered you made a video on these!
Glad you mentioned cavitation. Put your hand underwater and move it from one side to the other really fast. A vacuum pocket will form behind the hand that you can easily see. There's no air in there, but it is a cavity. I have also seen the inlets being pressurized to reduce cavitation. The highest I saw was 100-PSI, and that was on a 3000-PSI system. Great vidya, my friend...
So hydraulics are the big boy version of wimpy pneumatics? :-)
Love these vids. I'm not a mechanical engineer or anything (just a web app developer), but I love watching technical stuff and learning. I work on my track car, so I guess this sorta falls in line with it.
You're seriously the first YTer I'd consider giving to on Patreon.
Moe7404. i worked industrial hydraulics for 20 years. now retired. that demo was the best that subject could EVER be done. the part about pump or motor is a point that even a lot of people that work on them dont even understand
I to work in the hydraulics industry and it does catch a lot of people out. What he stripped down was actually a pump tho because of the 2 different sized ports and the kidney plate seal only sealing off the high pressure side. Some pumps like commercial brand actually run a full seal around the shaft like a motor has but the ports are the give away.
Ist a one directon motor wich needs the sealing only on the higpressure side an a lekage flow from the bearings spots to the Tank side
The actuator is labeld as a Motor also
Greetings from germany
Moe Shouse I have an old backhoe and not really any power or force when I’m using the backhoe part. Would it be a bad pump?
Haha "click". Totally torqued to spec like a boss.
You're a knowledgeable man! And i'm glad to learn something new from you every video!
Hydaraulik relef valve
Relef valve experience
+AvE I like this new frequency of video releases. Keep it up!
I was looking for a repair video on hydraulic pumps and you came up! VERY COOL! I love your videos! Thanks!
It's a lawnmower supercharger.
Does that mean it force-feeds grass into the blade?
Like how I put USB cords into the plugs.
"God damn it! TAKE IT!"
+Dav5id Buschhollll
I was so pumped for this video
I never really thought about the details of a gear pump and falsely assumed that the oil goes through the middle part, but had been wondering how it would do that as the cavity is pretty small there. Doh. That the oil goes _around_ the outer diameter makes much more sense. #TIL. Your vijeos are a source of interesting information. Skookum as frick. Thanks!
never thought about it until seconds before he was explaining it, but I too assumed the flow would go through the middle. which makes absolutely no sense in retrospect
N
I always imagined the closing in teeth would pressurise the oil (although the oil doesn't change in volume very much at all unlike with compressed air) with some leakage but yes going around the outside makes more sense.
Henner Zeller
I made the same assumption
The cut out pieces on the gear side of the bearing holder only allow oil to escape back out into the side of the pump that it came from. Because the groves don't break into where the bearings are. The groves on top do look like they allow the high pressure oil into the bearings. I think this makes sense because if the oil was flowing in and out of the bearings it would not be at as high a pressure. Also I love your channel, and I wish I had lecturers like you at uni.
That was incredibly informative. I love your videos.
A year and a half of engineering classes: the video
I was always under the impression that hydraulic motors had the same size ports on either side, so that the motor would spin the same speeds in either direction. Then hydraulic pumps normally had the larger size for suction and the smaller size for pressure, depending on the application.
I can’t believe that it’s almost six years since I first watched this video. It’s still great to watch now. Thanks.
That was awesome! Actually great info and fun while we are at it! Love it!
It is really fascinating to see the inside of the gear pump!! Thanks for the video
I am a mechanic for a company which specializes in truck mounted material handling loaders (primarily logs) ran completely by a gear pump mounted to an eaton pto on the underside of the truck transmission and driven by the input shaft of the transmission, typically when we see symptoms of a tired pump we only replace pumps, not disassemble and repair. This vidjayo defintely helped me understand a little more of the witchcraft that goes on inside these pumps
Thanks for another great video ave.
Great video! Could you possibly do a video of the internal workings of a hydraulic pump/motor and how it transitions between the two functions? Thanks!
Great video, and great style. 10/10!
Thanks for making it humorous too.
Very Good man! I’ve learned a lot in so little time! Thank you.
I just had to rebuild one of these on my PTO for my wrecker, and damn. This knowledge is great.
Your videos helped me fix my ingersol-rand impact now its helping me understand pto’s that i work with daily better. You got one for everything dont ya
Another great video Ave! Learned a lot, thanks!
I always wondered about the IN's and OUT's of a Hydo pump.... and now I even know the in-between's.
Thanks for the explanation. Brilliant.
I love how you go into detail on how to verify that it's a metric bolt and then you wail on it with an 11/16 wrench. You can't script gold like that.
Celeb reply here!! Sorry it took me 4 years to notice...
I love you man. I never seen such an explanation like this for gear pumps. neither in books.
Very loud and clear, thanks for sharing this information
Very education and accurate. This helped me to understand the K46AC transmission. Thanks
Those pumps are designed to wear into itself. The gears eat into the housing at break-in making its own clearance. You will always see wear in the housing. The wear is on the low pressure side. High pressure pushes toward low pressure. If the wear goes past the housing locating pins to the high pressure side it is worn out. If you replace the bearings, you reset where the gears are at in the housing and you have internal leakage. Thanks for the vid, sorry my comment is a year late.
Hello. Is it possible to buy these bearings as spare parts?
This was actually Quite informational! well done +AvE
Only positive displacement pumps create flow. Centrifugal pumps create pressure. Correct me if I'm wrong, but I'm fairly certain, and this makes intuitive sense when considering the high clearance provided in most impeller pumps, and the low clearance in positive displacement pumps like gear pumps or reciprocating pumps.
Upon seeing the Craftsman wrench, I had to go into the toolbox for the crucifix and hold it up to the screen. Thoroughly shaken, I then called my Snap-On dealer for further support.
How many easy payments did that cost ya?
+Marcel LeMay Lmao! touché brother.
yeah and when she breaks and the guy doesn't show up for a month. fuck that! nawh any way if hes like most of us here hes probably got at least 4 11/16" wrenches. Plus the ones hes had to fuck up to change that one hose jammed up at the back to the valve body some some obscure obsolete machine.
some would say the real measure of a man is how many combination wrenches he has cut in half and/or welded into funky angles
Awesome job! Very informative! Thank you
I appreciate your clear explanation and good reasoning.you are professional. Thankyou for sharing without holding any secrets.
Put my 48 Ford 8N into a tree stump, cracking my loader pump case earlier this year. Had to self learn everything you just showed. This filled in some lingering gaps of knowledge from that day.
i feel ave knows me, i do roll my own smokes and can kickstart a harley
but are you female?
was that aimed at the od female in the crowd then? didn't notice that xD
Quit smoking, roll a joint and switch to enduro (dual sport).
Thanks man. Very in-fkn-formative. I had to replace the oil pump in my car about 20 years ago and for whatever reason I thought about gear pumps and watched your vid. Great job, good info.. Thanks again.
Great video, your ability to explain relatively complex workings is second to none. I was going to ask your option on a brand of tool the other day and bam there it was, what do you think about porter cable?
Very cool and interesting video! Thanks for being informative.
Thanks for the video and for the clear and detailed explanation!
"You're gonna have schmoo blasting in your face like last Saturday night" --AVE
Fukken pure gold buddy
"Before I was rudely interrupted by the truth" has to be up there with one of your best lines.
Copyright it quick before it becomes a US presidential campaign slogan.
just stumbled upon this channel, 2nd video in. I knew right away this guy is smart and funny. Keep up the good work!
What drives hydraulic pump and the pump creates pressure, that pressure is determined by the circuits resistance to the flow of the oil passing through it, where that occurs determines the nominal (required) pressure, and the max or stall pressure. The resistance in the lines orifice fitting filter or valve will determine nominal pressure (the pressure that occurs in the lines when the force driving the pump meets the opposing force (friction) enough pressure builds up to either overcome the resistance or bypass the circuit through the relief valve, of the system is functioning as intended then the H/F starts to transfer the pumps mechanical input to the motor, (pressure and flow) setting the motor into motion and the fluid into the return line.
This is awesome , im taking a hydraulic design course right now so this is at a perfect time!
Hey man, I hope you see this. I just wanted to say I love your videos.
Very fun and educational. Some of the best entertainment on youtube.
Chooch.
I love this channel...always make great videos!
Om Gosh Ave...
You have a video for everything.
What is it that you do for a living?
You're a genius.
I keep waiting for the day when I'm going to need something I learned here at work. I work in the wireless internet industry, so there's not many hydraulic pumps and such, but some day!
Think you should find some vajayos that’s apply to your needs friend
Great, always learning something with your vids.
Great vid, would love to see more. ie spool valves, proportional control etc etc
Very clear good views,explanation,and comprehensive language;as much as vocabulary,u can tell the speaker knows what’s an hydraulic component
Lmao "like last Saturday night."
Sir, you have a way of breaking down high end knowledge to my level. Also, I can't stop saying chooch or skookum. Thanks!
cavitation is not from boiling, but from moving a surface in contact with the fluid faster than the speed of sound of the fluid.
That doesn't sound right - the effect should be dependent on the vapor pressure of the fluid. The bubble collapse does occur at the fluid's speed of sound, though.
+Hans the speed of sound is different in all materials.
@hans the speed of sound waves differs among different materials. high density materials transfer concussion waves faster than low density materials, hence the speed of sound is faster in water than it is in air. grade 4 science ftw
let's do some math, speed of sound in air 340 m/s , a pump gear diameter 25 mm (a big pump )and so
340 /(3.14 *.025) * 60 = 259 872 rpm
if you divide that by 1500 rpm or 1800 rpm you find that it is around 173 ~ 144 fold
just saying .
@fawzan if I'm reading this correctly I think your reasoning is flawed. you're assuming speed of sound in air, at sea level, through the gear. what's flowing through the gear is oil under negative pressure. as AvE said the oil can boil, now I'm not an inganeer or a math magician, but it stands to reason that the density inside the gear is very different from oil at 1 atmosphere of pressure. now I have been wrong once or twice, and could very well be again, but my previous point was to explain "speed of sound of a fluid".
Thank you Mr. AvE for detail explanation.
Very great video! And much appreciations!
Love you vids man..! Keep up the good work
You are off your rocker.....I love it and the smoo is seeping in....thanks for the enlightenment.
I love how you can explain shit better in a few minutes than 3 weeks of high school ever did..
Absolutely. I am not any kind of engineer, and I learn a lot from his vids. He drops gold nuggets of information without even knowing it sometimes I think.
They might have explained it just as well in high school but, at the time, you no interest or little experience in the topic. That is, the teacher's ability to teach isn't that much different from AVE but you, with your age and experience, are different.
That's because in high school teacher are only theorists they have no idea how stuff works in real life ...
Best explanation ever. Thank you.
After hearing you talking about pressure and flow, I wish you would do a few videos just on the basics. Kinda like what you would see in those old education film from like the 40's. Because without a doubt you're knowledgeable enough to get the info right, and I feel you would easily be able to put it all in layman terms.
how are you so fucking good at explaining things, you need to write books and force them upon us all
Very interesting. From the automotive mechanic side is always throught it squeezed through the middle. This makes more sense now that i see you explain it.
Great video as usual! Check out melt pumps for plastics, same thing only a lot bigger and much hotter.
Had to re build a couple of those last winter, i had absolutely no idea how they worked but somehow the re builds went good
+AvE Awesome ViJao Dude & Very Cool Motor. I certainly learnt a lot from this video. Keep up the great work. Nick.
Wow.. Thank you very much for this informative video ... it helped me understand so many things, and now I can reassemble my micro gear pump for the 1/16 Hydraulic wheeled loader :) ... Awesome Video !!
well thanks again Hoser, beauty lesson. very entertaining way of educating.
Excellent, I have been trying to figure out why my pump wont build pressure and heats up quickly, after reversing the rotation I didn't get the excess fluid diverter in the correct orientation, works great now, thanks!!!!
This was quite informative. Thanks!
I've been taking things apart since I was 5, and I gotta say I love your channel, even if you are Canadiene. Keep it up
Damn man, that was an amazing explaining
Very interesting. Keep on keeping on.
@6:50 the seal needs only one lip to seal the second seallip is for dust.
The Most Motors have a leakeoil port the Port is for reversal use in this case the motor can only be used in one direction
Such a good video, so much simple and good information I immediately paused and took notes in my notepad app.😎👍💯
thank you so much for your help, u taught me so much I needed to know if a pump could run either way all I have to do is flip the gears wow thanks again
Very informative.....I think I learned something.
thanks for helping my hangover with your soothing video
Great video, very very good job!
Great explanation, thanks!