Closed center hydraulics overview.

[@jerrydavis2420]

Ignore what Todd said. You sharing your knowledge is pure gold. Anyone not willing to learn from someone that is willing to teach can go elsewhere. Keep up what you do and Merry Christmas.

[@actorzone856]

I work on newer tractors mostly the engines rebuilds, I refurbish tractors to sell, I don't get to experience transmissions and hydraulic internals because none of them had any issues, i learn a lot from Warren because he has a wide range of experience.

[@johnerway7255]

Warren, special thanks for your over view of the second (Stage) pump operation. lol, don't give me too much kidding about second stage deal, it's just my process of understanding. Thanks for sharing and hope you and yours have a super holiday.

[@fsj197811]

Merry Christmas! Thanks for sharing your time with us all and teaching us a thing or two. Some old 60s air conditioner compressors are axial style with a swash plate similar to that unit but without the variable displacement.

[@davidworsley7969]

Warren,you are a hard working and knowledgeable man. I've never ridden, much less tore apart the machinery you live and breathe,yet I enjoy your down to earth,clearly expressed commentary,which reflects attitudes and values which are fast disappearing. Forgive me if I fast forward occasionally when you get into an in depth analysis of some arcane yet vital aspect of your work but I deeply appreciate your output. Sorry for banging on-All the best to you and yours over the festive period and evermore.

[@craigsmith8217]

It's all a learning experience. That's why I watch your videos. Take a day off and have a Merry Christmas.

[@oddwad6290]

Thanks again for all your honest effort ! May you and your family have Merry Christmas and a good year !

[@jasonbeaudoin8359]

I appreciate what you do thanks for sharing your knowledge. I hope you and your family have a wonderful Christmas...

[@Boomguy2022]

I also work with these pumps and some of the issues are determining if it’s the system commanding the high pressure or a stuck swash plate causing the issues. Just a comment about load sense, if you have no load sense then you have no pressure. So block the load sense line going to pump and pump should be in biased state or neutral. So if you still have high pressure you have a suspect pump. These pumps can cause fun problems with engine not running at idle or low power issues. I have even had engine reps scratch there heads trying to figure out engine issues and it’s the pumps. Good info you have shared good explanations. Merry Christmas.

[@cesmith4566]

Had a McCormick tractor stall the motor like that once. The dealership said it was the pump ,I looked at the pump and it was fine! They put on a new pump and did the same. The tractor belongs to the in laws so I had to go to the dealership to sort this out! A transmission solenoid was stuck when it would start it went into two gears and stall! Merry Christmas to you and your family Waren

[@markreetz1001]

Thanks for the hydraulic lesson. Sometimes it is tough to get hydraulics working correctly after changing out a pump. Dad had a JD 300 industrial tractor that had a hydraulic issue for years. turns out the issue was a valve on the loader. Once the valves were replaced, it had more than enough pressure. Merry Christmas to you and your family, and all the best for the new year!!

[@farmin4468]

Thanks for the excellent information Warren! This is the kind of information that i thoroughly enjoy and is not readily available to the average person. Merry Christmas to you too!

[@ThePlowGuys]

Merry Christmas to you too. I know nothing about tractors and I watch your video to have some insight to the workings of these beasts. Thank you.

[@scrappinbig2239]

I enjoy watching all of your videos and the way you tell your viewers what the problem is and how to go about fixing them. Have a Merry Christmas to you and your family and also your four legged kids !

[@nickpersenaire4443]

Hey Warren, thanks for sharing your incredible wealth of knowledge once again. So true we all learn something new every day. Take care.

[@MrCrabbing]

Thanks for that I now have a basic understanding of the stroked pump system, Merry Christmas.

[@Johnditit]

Learn something everytime I watch your channel. Merry Christmas!

[@zephyrold2478]

It has been a pleasure to follow you throu the year, Merry Christmas to you and yours.

[@sandy1653]

Hey Warren, thanks for putting these videos out, and a happy Christmas and new years to you too.

[@jerryglen986]

I hope for the new year that Warren's channel gets 150k subs and millions of views. This family deserves everyone's viewership. Tell your friends family. There is very few real honest guys doing this. This is educational channel by a real road Mechanic. Not a glory boy, pajama boy. Real honest videos you can reference years from now. Get the word out.

[@williegillie5712]

That piston pump looks a lot like a lawn mower hydrostatic transmission. A big thumbs up for all I’m learning on your channel

[@bill3641]

Warren, thank you for explaining the difference between the open vs closed center designed valves . Happy Holidays to you and your Family .

[@suzylarry1]

sounds like you had a great year, hope it continues , enjoy seeing all the " Why did it fail" scenarios as in this video. Thank you , have a great week with family ( you need the week, farmers may not offer you the time,sorry)

[@dennisbailey4296]

As an automotive mechanic, we do have hydraulic systems that give similar problems in spool valve sticking. But not realizing how much heat can be generated when you don't have flow in a high-pressure pump area. Really good simple description and breakdown for us. Have a great Christmas Warren and family. Have a productive and safe New Year. From Canada.

[@jesseburns9734]

Warren may God Bless you and your family! Please enjoy the holiday and be safe.

[@craigboyd6462]

You are very good at explaining the workings of things, you would make a good teacher, everyone could learn from you for sure

[@FB-tq5ln]

I think I will have to go back to school to understand the mechnics of that video, I am only a layman, your knowledgeable video's are special for training and on the (tools) job. As was said before never dismiss free training it is priceless. Happy Christmas and Season Greetings. to you and all your family. not forgetting the dogs to. Bless you . From Dublin Ireland

[@rowan2128]

I have to say that is pretty damn cool how that pump works. I really like how you explained when you took it apart. Plus showed us all the parts. Thanks for the knowledge! Merry Christmas and happy new year to you also warren!

[@matthewm1149]

I found you by accident and I'm glad I did I like watching this kind of stuff since I was a kid. I have always tinkered with stuff eg taking stuff apart to see how it worked I hope you and your family have a wonderful Christmas and a prosperous New year from Matthew in England

[@barrb6134]

GREAT explanation of pump operation, thks!!

[@forrestgump1379]

My experience with the industrial versions of these pressure compensated axial piston pumps, a down stream relief is a must. Set higher than the compensating pressure it gives the fluid somewhere to go as the valves open and close and the pump stroke compensates. Fluid has inertia just like a large flywheel, so as you said when flow is at the full amount and a valve slams closed the pump will not de-stroke that fast and a tremendous pressure spike will occur. The relief will protect the system from these spikes.

[@blacksmoke5009]

Excellent video and tutorial! I’ve used a differential psi guage in the circuit to help troubleshoot and track down issues. Warren thankyou for taking the time to explain tear down and repair/rebuild. I always look forward to watching and learning and I can relate to what your faced with on a daily basis! Thanks for sharing and a very Merry Christmas to you and your family! Take care and relax a little bud ! Thankyou!👍

[@JonDingle]

Fascinating stuff young man because I have never seen or understood how these hydraulic systems work. I suppose with modern tractors most of them rely on hydraulics to control all the basic functions and are themselves controlled by computerised electronics so a modern tractor is basically a engined poweredmulti tasking hydraulic pump governed by electronics. Complicated stuff but not impossible to learn. Many thanks Warren for the insights and lessons you give on repairs and rebuilds. All the very best to you too for Chrismas and 2020!

[@canuckyank82]

See the animations I posted above for Warren's viewers.

[@junkpile4106]

Great video. Very good explanation of system operation.

[@DanielGouldingnavy]

Excellent explanation. the snow cats I deal with are hydrostatic drive, similar principle but ours are centered and use charge pressure to tilt the swash plate for forward or reverse. Merry Christmas to you as well.

[@beckywatt5048]

Dan Goulding Used to work on machines called hydroaxes that used the same principle, had one on tracks like a huge snow cat for mowing swamp ground , when the pumps grenade it's a real mess.

[@joshclark6101]

Amazing explanation of hydraulic system. Keep the hydro. Videos coming please. There isnt manya sources for a regular guy to learn all about hydraulics. So your videos help alot

[@danpriest9317]

Perfect timing. About to dive in to a JD 410B with no hydraulics. Your videos are always great, and when I get my hands on what you are talking about, it all clicks and makes sense. Much appreciated, as always, and hope you had a Merry Christmas and Happy New Year.

[@vernt4583]

Great video Warren !! I have a 6410 John Deere with the same pump system it’s been trouble free so far with 3400 hours. But just used in the hay operations. Hydraulics are amazing and what the engineers come up with can be a little confusing at times. I used to work in wood industries and the electrical controlling hydraulic could be very precise with linear position rods and 4 to 20 milliamperes drivers on valves. Merry Christmas to you and your family

[@brownmilligan1936]

i hope you and yours have a happy xmas and thanks much for your time.

[@robertstock9912]

Thanks Warren you are awesome guy you are like you said you are learning and you take time to try and teach others that is great

[@timshelton4041]

Thank you for sharing 'a working day in the life of Warren' and of course not forgetting your four legged helpers! Wishing You and All your Family a very Happy Christmas and a Healthy, Happy and Prosperous New Year (when it comes)

[@rodneymiddleton9624]

Just like the new style AC compressors without clutches. They have electronic modulated wobble plate controllers to increase or decrease Freon flow. Very interesting. Thanks for the video. Awesome content.

[@davidjackson4112]

Thanks Warren for sharing your talent. Your channel is so intriguing, loaded with valuable info and explanations about your topic. Wishing you and Your family a Merry Christmas and a Happy New New. Oops, Blake also.

[@texasgilley9533]

Warren Great lesson on pumps enjoyed it very much I appreciate the knowledge

[@markarmitage7411]

Happy Christmas to you and the family. Thanks for making the videos.

[@melcoats9696]

Merry Christmas t o you and yours. Another great deep dive video, always fascinating.

[@irenesilvers7096]

Good job Warren, enjoyed it and learned a great deal. Merry xmas to you and yours.

[@briananderson1781]

The constant pressure system is more responsive and efficient than the constant flow system but I prefer the reliability of the constant flow (gear pump) system. If you read industrial history of Caterpillar and John Deere, these companies were known for simple but rugged equipment that would crank and run, few bells and whistles but good old simple.

[@RJ1999x]

Might have been true in 1950

[@jeffsnider3588]

@@RJ1999x - Ha - You are exactly correct! Newer stuff is not simple, rugged, reliable or made in America.....all the attributes that made these companies great. I often wonder if a simple version (of course with all the safety decals and shields) of a tractor was produced how it would sell. I have a Allis-Chalmers WD45, it runs great but would not bring crap at a sale. It is tricycle and no power steering so I keep it and use it.

[@RJ1999x]

@@jeffsnider3588 If the nuclear bomb goes off the only 2 things left will be a cockroach and an Allis Chalmers WD45! Absolutely bulletproof machine

[@jeffsnider3588]

Did you realize the old WD45 by Allis-Chalmers was one of the 1st tractors with demand flow (pressure compensated) hydraulics, the pump is an inline piston pump run off cam lobes with roller-followers. No filter and dam thing has run for years with no problems on my tractor. At one time many farmers owned a WD-45, They were inexpensive and fulfilled the basic requirements. The pump does run at a rather slow speed though. Allis-Chalmers was another innovative company that had some really good designs. The D-19 diesel was the 1st turbocharged tractor.

[@RJ1999x]

@@jeffsnider3588 The hydraulic system on a 45 was high pressure lo flow, which made it work very quickly and required a small cylinder.

[@malcolmbarrett8966]

thanks for you informative videos wishing you and your family a happy and quiet Christmas and a very prosperous new year

[@donvoll2580]

Good day from Ont. Merry Christmas & happy new yr. I learn some & got more confused. Thanks

[@rickjohnson1632]

Your a beast Warren ! 👍 Merry Christmas to you too ✌️

[@eddiekilby]

This pump remind me of the pump in a hydro static transmission in a lawn tractor only the swash plate controls forward and reverse.

[@danielwhittaker7896]

Really enjoy the videos fine them very informative and enjoyable keep up the excellent work Merry Christmas 🎄

[@canuckyank82]

Now I've learned that Deere needs a couple of pump pressure gages on those pumps and in the cab so the operator knows what is going on. You have excellent explanations and someone should do animations of that pump in operation and with different situational conditions. In time, I guess. Great video.

[@canuckyank82]

drive.google.com/file/d/13k0oQ7sQ2i8YN7dJsFk3fC7Usr73sx3K/view?usp=drivesdk. Cutaway image of a pistol pump from advanced fluid power Inc. Website.

[@canuckyank82]

Animations of hydraulic pumps: kzbin.info/www/bejne/jZC6Yp9_aJaWrdk

[@warrentavernia5136]

merry Christmas and new year to you and family . thanks for all the great videos . keep it up

[@Deebo1812]

Awesome info, Warren. Thanks for all you do, my favourite KZbin channel.

[@barrymoss900]

Great video Warren and and have a great Christmas and new year 👍

[@bradenownsyou]

Love the hydraulics stuff Warren. Here in melbourne I see snapped pump shafts weekly from trucks cavitating and getting super hot oil or dead heading the system those small shafts just go bang. Merry xmas to you mate.

[@spitztheweevil]

Merry Christmas to you and your family Warren and wish you a prosperous New Year . x

[@glenvanbavel2094]

Awesome video. I learned a lot . Thanks again. Marry Christmas

[@robertwhitehead5946]

Great video Warren. You and your family have a great holiday.

[@chuckpreston4981]

Merry Christmas to you and yours as well, Warren. Thanks for all of your informative videos. It's obvious that you have lots of invaluable experience and knowledge - the fact that you are willing to pass it on freely is a blessing to everyone who watches. A quick comment on your vise, I just saw a Wilton 6" vise at Northern Tools on sale for less than $200 with free shipping - something to consider. Happy New Year, may you be prosperous, healthy, and happy. Best regards, Chuck P.

[@markschumacher6630]

Really appreciate all of the narrative as your working, cant tell you how aggravating music is while watching at high speed, drives me nuts..

[@junglejonny1000]

Merry Christmas and Happy New Year from me and mine to you and yours Warren!

[@stuartlockwood9645]

Hi Warren, great explanation on that pump, it sure was destroyed. Looking forward to your next video ,as allways. Best wishes to you and family. and a Merry Christmas and a Happy New year, Stuart uk.

[@robertstephens767]

Merry Christmas to you Warren, have a well erned break with your family

[@rc3140]

Merry Christmas too you and your family. God Bless us all. Much appreciation for all you do for all of us 🍺🥓🥓🍩🍩☕️ cheers 😃

[@MCCORMICK10202236]

Thanks for explaining. I need to invest in a set of gauges and flow meter. Merry Christmas!

[@stevenashby8268]

Merry Christmas and a Peaceful New Year Warren, to you and yours. Great video and well explained very interesting. 🎄🎅👍.

[@aussiefarmer100]

Merry Christmas to you and your family from Australia and a happy New year to you to Warren

[@dougdegraff5892]

Merry Christmas Warren and blessings to you and your family..

[@anteatert600]

Merry Christmas & a Happy New Year ! Always look forward to your videos.

[@ollie-lk5dx]

Merry Christmas to you and your family. Thanks for the info, I found it very interesting.

[@ruudns6075]

Good video at pumps :). Merry Christmas to you and your family Waren.

[@rudywernimont3289]

I work with alot of load censoring on alot of the sprayers that I work on at the dealership I work for. Merry Christmas Warren.

[@Lucky4wd4840]

Warren, I also wish you and your Family a Merry Christmas and Happy New Year! We are working on JD 7600 with seized rock shaft (Remember the rock shaft you had video of) and JD 6310 syncro-range transmission jumping out of 2nd gear (found snap ring worn down).

[@beckywatt5048]

You are correct , Warren , they tell you how to half ass test it , but if there is any question about it's function ability ,replace it , kindof like the Duetz hydraulic brain.

[@kerrygleeson4409]

Thanks for sharing your knowledge Warren always very interesting have a great 🌲🌲🌲🌲🌲🌲🌲🌲

[@trolling4dollars816]

Merry Christmas Warren and family!

[@jimwesselman]

Warren, to you and Mrs., Blake and family have a wonderful Christmas. I hear that it’s bitter cold up in Northern California! I guess Southern Oregon would be included.

[@mog5858]

thanks keep up the good work. Merry Christmas

[@Dr_Dungheap]

Thanks Warren. Super useful. Merry Christmas!

[@jabbasan12]

Merry Christmas to you and the familly Warren!

[@3ironheart]

Merry Christmas & happy new year! warren and family....

[@Tf9500]

It’s nice Deere put the charge pump under the main pump saves a lot of splitting. I always liked the fact that the old Deeres were all steel and hardly any aluminum, I think they were a little better. Alice Chalmers used a similar pump on the 7000 series. At least the problems are all at the back of the tractor on these ones. Merry Christmas 🎁 thanks for all your great videos.

[@lprock4730]

Wonderful video, Merry Christmas to you and your family, Warren!

[@rhadden8976]

Wishing you and your family a merry Christmas.

[@trevormansfield6740]

Good tutorial Warren. Thanks

[@taz_adv]

Merry Christmas from Tasmania Warren. Enjoy your break, relax and keep safe. Looking forward to you posting more entertainingly insightful videos. Please don't go along the path of other KZbinrs adding loud obnoxious music to their clips, keep being that great teacher to all your students (subscrbers). I deliver gas for a living but I was hooked from the first one of your clips I watched. Your fantastic work ethic, listening to you explain how things work makes me want to come work for you, you're not one of these (and I use this term loosely) new age "mechanics" when things get a little tough they put it in the too hard basket and give up.

[@westerntruckandtractorrepa1353]

Thank you for the kind words, have a Merry Christmas.

[@festus512]

Thanks Warren another educational video for me.

[@keithbishop249]

Great vids Warren Merry Christmas

[@1995jug]

Great explanation, Warren have a Merry Christmas you and family.

[@Noddy-qt6ol]

Merry Christmas Warren and family. hope its a good one.

[@scradley05]

Merry Christmas Warren! And Happy New Year! Hopefully it's not too cold over there🥶! It going to be a hot one us over in Australia. 🥵

[@laneburgess1643]

Very good instructions. Thanks for sharing.

[@KG-yn9qi]

Sir, so what I understood and learned. There is a 1st stage charge pump psi of aprox. 400 to main pump. Main pump is a variable flow piston type. Discharge from pump goes to vavle assembly. At valve assembly 1st valve is a type of relief that lets fluid return to pump or to what ever system is calling for psi/flow. Now returning to pump goes to a psi and a flow control valves that by design rotates a plate that cause the pistons of the pump to move more fluid at the max needed and the psi relief sets the max psi, with the only other variable being engine rpm. For flow out put. Now if for any reason fluid is not flowing or restricted it gets hot, cause damage.as well as other things cause problems. Stuck valves,bad motors,and pluged filters ETC.

[@uggy7]

Merry Christmas and a very happy New Year Warren 👍👍🇨🇦🐶❤

[@molly54z]

Great year of videos looking forward to 2020 videos have a good Christmas and happy new year cheers

[@SJ-oy9eh]

Are there Warren somehow I missed this video but it was very educational do not work on equipment like that mostly work as a heavy truck mechanic but you never know I do deal with hydraulic PTO pumps and so on and so forth systems anyways I do learn stuff from your all your videos thank you

[@johnhatfield5877]

Great job warren

[@wolfhayley3758]

Merry Christmas Warren ! love the videos man.