Man you have no idea what a service to mechanical geeks you are providing - I have been trying to understand hydraulics for a year - this is by a hundred miles the very best video - I thank you and I salute you you are a fantastic teacher and should do it for a living. love your channel.
I'm always thrilled and smiling from ear to ear when I hear from folks that these videos have served to help my brothers and sisters better understand in a down to earth way with no fancy verbal gymnastics to cloud things up. I like to give every tutorial a big old K.I.S.S " KEEP IT STUPID SIMPLE! " thanks a million for the kind words! peace love and respect Dave in Virginia!
awesome! I added top and tilt spool valves on mine. you can see that series on my channel as well. since I uploaded the series many people have done theirs the same way. so far mine is still holding up and functioning great. glad to see folks getting some value from these videos. peace love and respect Dave in Virginia!
I have been reading and watching videos for about three solid days to try and figure out exactly how to plum in an electric over hydraulic third function valve. I finally grasp just how the power beyond function works. But I had to do a ton of research to understand it. Your video made it super simple and I wish I had found it sooner. This is a great resource for anyone who is not well-versed in all things hydraulic.
thank you I hope this video gets shared so others can benefit from it. there are several very informative videos on this channel pertaining to tractor implement set up and use. I'm sure you will find them helpful as well.
Thanks a lot!!! This video is spot on. I was able to install a 2 spool 4 way control for an add on rear flail mower on my Kubota tractor. Now I can cut ditches and around ponds. Thanks Dave.
thanks Joe, I hope I can make more if the weather ever breaks. one day its 70 here the next day its snowing to beat the band! crazy weather! enjoy looking at your videos as well brother. hope you are doing well.
Today I'm gonna try to install the top and tilt I got from the dealer. It did not come with instructions though the service manager said that he would be available to phone consult with during the installation. This video is hugely helpful. Explaining that the hydraulics are in series clarifies the circuit, especially for me as an electrician. Thanks as always Dave!
Hi Dave. I was making good time on the installation but the kit I got from the dealer was missing the bracket which holds the linkage and levers atop the tank and below the control console plate. So I sewed things up and used the box blade the old-fashioned way, climbing down to make hand adjustments on the fly. I sometimes wonder how they tolerated hopping up and down from the tractor until I remember that they used to have to hook up a mule/horse/ox and that a tractor, even with hand adjustments was probably pretty damn convenient!
watch it all you want to. after seeing this and understanding it my series on adding rear remotes will be easier to follow. glad to be able to help. I have a learning disability myself so I try and make videos easier for even me to understand. thanks for the kind words and for watching. peace love and respect
Great videos, I’m getting ready to try to install one on my tractor. I’ll probably be coming back several times to get info from yours. Good to see a fellow Virginian on here.
Thank you so much for this. I had a lightbulb moment piping up a front loader as soon as you said everything is connected in series. Relocated 2 pipes and had it working straight away after your explanation. 👍👍👍
AWESOME! I love when these videos are found, and they actually help folks. there are a lot of information packed videos on the channel. when you need it then its nice to have it there available. really appreciate your kind words and time stopping by and writing to me.
Once again a KISS approach wins the day. Great video on a topic that is too often misunderstood or not fully understood can now be usefully understood. I would say a great video and a job well done. Thank you sir.
Probably saved me hours and hours of troubleshooting. Fixing up an old, somewhat neglected Kubota L235. I discovered an aftermarket aluminum hydraulic adaptor block, but I don't have a front end loader. Also the 3 point lift isn't working yet. I've absorbed all this info and I'm certain it's going to come in handy. Thanks!
This is great, I wasn't sure if my backhoe output would be tank or back into the PB line. I'll double check the valves on the unit, but I think it'll just splice inline with the PB circuit as you show. Thanks again, I was planning on doing this today or tomorrow, great timing!
man that is so great to hear! I'm thrilled this video and my other many videos have helped so many people. its comments like this that make it all worth while! please feel free to share my videos on your social media outlets. thanks for commenting and I hope you will subscribe if have not already.
super excited to launch this video as I know it will help a lot of folks who are apprehensive about venturing into hydraulic tampering and modifying. its still a big job and likely worth every penny the shops charge to do this type of work.
glad you enjoyed it. I'm working on a new series to show how to add a third function valve set up for less money than the typical wrlong , or landpride system so stay tuned!
Thank you, makes sense. I'm thinking of adding a spool valve to the back of my JD990 to run a thumb on my backhoe. This helps me understand the process and what to look for.
JD990 WOW that was one of my favorite tractors ever! a real beast of a bare bones tractor. I always wanted one with a BH I had its baby brother the JD 790. I'm glad you found this video I think it will help a lot of folks. of course I'm sure the dealers are pissed that I posted this as they will be losing work.
Maybe they will, but if it saves a few bucks in our pockets and we're capable of doing the work, why shouldn't we? I just subscribed, looking forward to your next video.
I hear you brother. I learned a few things to. only took 6 tries to make this video. door bells ringing, phone ringing, you got mail chiming on the pc, suddenly had to pee, all sorts of interruptions. lol been one of those adventures for sure. appreciate you letting me post to your page.
Well done Dave. Very helpful for us Newbies Now I can move on to better understand my mini excavator Hydraulic circuits.. Many thnaks for taking the time to pass on your knowledge to the rest of us!
Glad to help, it always brings me a lot of joy hearing from folks that these videos help in some way. I do appreciate you taking your time to leave such kind words.
Dave, Thank you. I appreciate your videos !!! I was thinking that to add a rear remote I would need to Tee off from the Power Beyond and tank circuit to make it happen. I have both a loader and backhoe setup. I now understand that it all needs to be in Series to make it all work. Thanks...
glad you enjoyed it Greg! I'm sure it will help someone out there who wants to venture into adding some hydraulic goodies! really appreciate you watching and commenting.
@@daveknowshow Well almost, I'm confused now! I must have done something wrong. I added a spool valve and remotes to my Kubota L3800 and now to 3 point hitch does not function. Would you mind helping? Both remotes work for my stump grinder. Can I PM some pictures?
@@diamondcutter8535 also just to let you know. Id say you have the tank port and the power beyond port likely backwards. this means your power beyond is dumping straight back to tank and your back to tank is dumping into the power beyond port. its not gonna hurt it but as you can see it makes the three point no longer operate.
Great diagram! The only thing that I would suggest changing is how you draw the "relief valves" and "back to tank" lines. From your description, it seems as if the the relief valve should be drawn in line with the "back to tank" line rather than off by itself. Thanks.
it actually is screwed in the side of the manifold block on this specific machine exactly where shown. this is where you adjust the shim pack to increase and decrease relief pressure. thanks for the comment.
Thanks for Your well presented explanation on hydraulic Feed & Return to tank lines as being in series Overlaying the 3 basic circuits was a Great Help by using the KISS method ( Keep It Simple Stupid ) My training has been as a US NAVAL Electronics tech & once You said the Hydraulic Flow is in series that made it much easier for Me to understand Fluid Flow theory & usage Spool valve & relief valve terms now makes sense It is funny on how I can relate Hydraulics assemblies too Electronic components I bought a Kubota L-2501 a couple years ago and a week later a new Backhoe for it The only 2 things I have accomplished so far is installed the Sub Frame for it & Hydraulic lines from the FEL controller to the rear mounting plate the back down to the Hydraulic block as a complete path Backhoe is still on its shipping pallet I don't have a Grapple or other hydraulic implements for the 3 point at the rear, yet, but I have been looking at adding Hydraulic fittings Question??? Since the system is a Series path is it possible to use the connection points I now have at the rear for the detachable Backhoe to feed a Spool controller or 2 inline from that path when the Backhoe is not connected? Thank You Again Ken in Florida
Hey Ken thank you for the kind words. they are much appreciated. yes you could easily connect a spool valve with quick connects that simply plug in to where the backhoe unplugs. or any place on that circuit. some spool valves have a back to tank port and may require running that extra line. I do think as long as you are using an open center spool valve you could easily omit the back to tank port line. just allow the fluid to flow the return into the power beyond line down stream. in my series "adding rear remotes/ spool valve" I installed my valve by simply unscrewing one line at the rear from the fitting and plumbing it into the spool valve. then came out the spool valve and plumbed into the quick connect I previously disconnected from. now the spool valve is connected and when the hoe is off the two hoses plug into each other completing the circuit. I used 1 male one female at the rear so they can plug into each other. this bypasses the hoe and completes the circuit. hope that helps.
Awesome, just what I needed to know to add a Land Pride 3rd function kit with having existing Loader and Backhoe. Land Pride instruction say contact dealer if you have a Backhoe! I will install in series with the the PB loop.
excellent! I'm confident this will help many folks as they take the journey to install hydraulics. I did a video series on my rear remotes but as I stated it was a bit lacking so this should clear things up a lot. really appreciate the kind words and thanks for taking your time to watch my videos. I have a couple on my channel that seem to be better quality wish they all were. peace love and respect, Dave in Virginia
Thanks Dave. This gives a better picture of how the fluids flow. So if a person wants to add two rear remotes to tractor, what kind of average cost would be expected for various parts? As always, nicely done.
Hi Dave, thanks for the video series, really helpfull since doing something similar. Do you know the thread type of the adaptors that go into the power beyond block? Is it metric, BSP?
no not bsp on mine it was 3/8 NPT into the block if I remember correctly. I tell you this hydraulic fitting sizes and threads can be a real pain in the neck. I'm currently custom building a 3/8 bsp to 3/8 npt adapter and its been a real pain in the butt to iron out.
thanks Bob I hope it helps some folks. its expensive to get remotes added on a tractor after its purchased. I hope this will give folks the courage to install their own.
Glad to help. be sure and check out my many other tractor and other how to videos which are packed with great information! I'm honored to have you watch and share my videos.
Awesome explanation, thank you. I have a small tractor Satoh S370D with a cat 1 3PH and FEL. I wanted to add a hydraulic top link and try to use a 2 spool valve or a joystick to operate hitch up and down along with top link out and in. Are the lower arms of the 3PH usually too integrated to add to a joystick or standard spool valve? I also want to add a remote filter because to clean my strainer I have to drain all the oil in the system to pull it. Where in the system should the remote filter be added?
great questions but beyond my pay grade. typically the rear lift has an internal hydraulic cylinder and a tad difficult to add a joy stick control for the actual three point. three point lifts are generally power up gravity down and have a position control sensor to maintain height. on mine the two spool valve operates a top link and a tilt link. I dont have the tilt link yet that will be a future purchase. normally the filter is in the back to tank line and on some tractors between the HST tranny and the back to tank return as well as the back to tank line from the three point system. a shop manual for your tractor would shed a lot of light on what you could get away with doing.
Dave, This video is the one that really just put it all together for me. And I was wondering what the best way would be to get the spool valve tank line teed back into the line to the tank-you had that tee on the block pictured right there on the screen for me. (Just need to figure out where to get these types of fittings now). I kept seeing inferences here and there about the 3301 with a Backhoe not being able to add rear remotes, but those seem to be unfounded-it looks like the backhoe if anything, makes it even easier to splice into that PB circuit. THANKS AGAIN DAVE
glad to help, keep in mind you can use the open center spool valve and not install the back to tank line. it will merely dump back through the power beyond port. this eliminates 1 hose completely and no need for the "T". found this out after the fact.
the Tee is an inline npt to 2 #8 jic fittings. the hoses on my Kubota are on the hose ends are 8G *jix or jx depending on manu. the fittings on the manifold are a npt to 8jic if it is an o ring type fitting on your back hoe or other attachment it is a jm or boss fitting it stands for Joint industry council. they are identical to 8 AN that are Army Navy fittings just looser standards. hope this helps
Great video Dave, Your setup is exactly the same as I've planned for my L3400. I do have one question, doesn't the backhoe also have a low pressure return to tank for the hydraulic fluid coming from the now pressure side of a cylinder?
Michael Grubisha no it uses the power beyond line and simply dumps back into it much like a loaders third function valve has only two lines one in one out. I'm sure you could likely set up rear remotes to work the same way but I have not looked into how to do that or the advantages or disadvantages of a system like that. My guess would be having a back to tank line helps aid in the cooling process of the fluid since it's used once and then returned to tank where as the backhoe theoretically could use the fluid twice as it would use it again at the three point. Of course the three point is not being used with the backhoe installed thus making it acceptable to utilize a non back to tank set up. It essentially uses the back to tank within the three point circuit at the manifold block. Hope this makes sense.
Thank Dave for this video. I have Kubota B7610, with a FEL. I am adding a thumb style grapple to the bucket, and considering an electric diverted valve in between the boom hydraulic circuit. I wonder if instead, I should tap into the PB port on the FEL spool valve and add a single level spool valve for the grapple?
I would add an electric actuated valve for the grapple lid and plumb it into the power beyond port. I have a video on that here. th-cam.com/play/PLLg8VIC7effpOwLD7Y7d2ghv5nY4-b7Cn.html
So if I do not have a manifold block with aux ports such as a power beyond, can I just put the main in directly into a spool valve and then run the pb from the spool valve directly to where the main in would have went on the manifold block and then T into the tank return with the spool valve?
yes and depending on how you set up the spool valve you may not need the back to tank port. just set it up so that the return dumps to the power beyond out port. this how kubota back hoes are set up. which is why they only use two lines. one in one out.
Daver, excellent video and explanation of how hydraulics work. But I'm stumped and in need of guidance. I have a Ford 800 and considering adding single spool valve kit to divert live hydraulics for a log splitter. How do I run a hose for low pressure/return to the tank?
you can simply have the low pressure return through the power beyond flow or dump it into the tank fill port although sometimes on some machines that option bypasses the filter which is not a good idea. so look into it further. typically power beyond return pressure is low pressure in fact its all low pressure until its being used the pressure build in the cylinder that is consuming it. the rest is simply low flow through on these open center hydraulic systems.
Hi Dave! Thanks for the video. It really helps younger dudes like me learn things. ;) Question for you: I have a tractor implement with two remote circuits. How to reliefs in the spool valve reliefs work if -- let's say -- something hits my implement and FORCES my dual acting cylinder to move? Will the spool valve relieve one side back to tank and draw fluid in for the other side? My tractor doesn't have float or continuous flow (Two positions and neutral). Thanks again, Dave. Aaron
not likely if it has no float position. typically, the relief in a standard spool valve is 3000psi which is higher than the standard setting on most tractors until you get into the super large machines. this 3000psi is mainly in play when you dead head the valve and the cylinder is at the end of its stroke. if this is a 3 point implement the three point will likely raise since it is gravity down. if this is tow behind batwing mower that may be a good question for Tim Marks over at tractor time with Tim. he uses a lot of batwing mowers and can explain how the hydraulics need to be set up. hope this helps. be sure and let Tim know I sent you there with this specific question so he wont send you back here to ask me. lol hope between the community we can get you an answer quickly.
Thanks for the videos. I've been watching over and over, and still trying to figure out just how to set up my spool valve. I have a Mahindra 1538, and it has a backhoe, so one set of rear remotes. But I have three hoses on the back. Two (male and female couplers) are on a metal block, and a third hose, longer than the other two, with a male fitting. All three hook into the backhoe when it's on. I take the backhoe off, and take the longer hose and plug into one of the other two so the 3-point works. One is PB, and assuming the other two are high pressure, and tank return. I have a Cross 4Z0052 2-spool valve with an "IN" "OUT" and "BYD" I can't figure out how to set it up with what I have. Any light you could shed would be greatly appreciated. Again, thanks for the vid's and thank in advance for any help.
so basically your new spool valve that you are adding will only be in use when the three point is active correct? in other words when the back hoe is NOT installed. so the hose that goes to the hoe that has flow coming out is the power supply line. the line you plug that line into in order to feed the three point is likely the power beyond port continuation. think of the power supply line as the power beyond out and the line feeding the three point as the power beyond in. the other line is a back to tank port. so the line that has power coming out goes into the IN port of the new spool valve, the out port of the new spool valve will need a hose to run to the back to tank quick coupling at the rear of the tractor, the port on the new spool valve labeled BY or BEYOND will need a hose and connector that will plug in at the rear of the tractor into the port that feeds the three point. hope this helps.
@@daveknowshow Thanks for the reply! I finally got it explained from the dealer...when the BH comes off, the PB gets plugged into the power circuit to run the 3PH. The return is unused. So now I know where to plug in the lines to the valve body. Thanks again, and keep up the great videos. BTW, I have you to blame for all of this in the first place! I was watching your video on how to run a box blade, and you had top n tilt. Seeing that, "I just HAD to have that!" LOL. Cheers!
@@solero7378 you can use the back to tank port with the new spool valve if you want to by just installing a hose with a quick couplin on it and when the hoe is off plug that in. I used the back to tank port on mine.
Dave , great presentation. I have a 2004 Kubota B2910. It does not have power beyond. You have any idea if I can add power beyond? I want to add controls on my box scraper like you did.
Dave Thanks Can you show links to parts used in your installation on suppliers? I have a Kioti LK3054 which is very similar to the Kubotas. Thanks again.
I dont have any links my advice is locate a decent hydraulic shop that is willing to help you figure out which adapters you need. some fittings on these tractors are 3/8 NPT " NATIONAL PIPE THREAD " others are JIC style fittings. do a google search for " identifying hydraulic fitting " this will help you be able to identify what you have and build from that. I went cheap because my money is limited. I used a lot of 3/8 NPT premade hose. this saved a lot of money. I still had to convert some of those 3/8 NPT fittings to JIC or BSPT " british straight pipe thread" and also the number 8 o-ring style as well. its a lot to deal with and I simply did the best I could to save money. with that said I likely spent more than I should have but lots less than if I had paid the dealer to install it and get the parts together for me. I got frustrated at times but it was a learning experience. lol
Great video Dave. I was wanting to install a hydraulic top link on my NH TC33D, but the 'factory' kit is over $1,800 just for a single remote valve. I saw your video and thought this would be a lot cheaper option. I have just one question, I don't have a Backhoe, so I assume just deleting that part of the circuit in the diagram, the process would still be the same? (Power beyond to spool valve, and return to manifold block).
I'll add my thanks as well, but I do have a question, if you don't mind. I just added a 3rd function valve to my L3301 to operate a grapple on the FEL. I am working on installing top & tilt to the box blade as well. My Prince (Wolverine) 2-spool valve does not appear to have a relief valve going back to the tank, as your video shows. Also have no back hoe. From the 3rd function valve, do I now route the PBY out line to the new spool valve and then from the valve to the PBY (green) input on the tractor manifold block? What about the relief valve line back to the tank, that the valve does not have? Also, in this configuration, do I need to install the optional Power Beyond/Closed Center Conversion Plug in the spool valve? Thanks again for your helpful video.
you need the valve to be an open center valve so if that means leaving the plug out leave it out. not sure on that valve. yes you simply run from the power beyond at the loader control to the input of the new spool valve then the output of the new spool valve goes to the power beyond at the manifold block. if you do it wrong you will hear the pump strain as the relief opens and more likely the three point will no longer raise.
Hi Dave, awsome videos, I have a question for you , I got a backhoe and I am wondering if I can plug into my rear remotes and bungy the joystick to feed hoe valve?
I guess you could but the valve will likely create additional heat on the fluid. its easier to just tap into the circuit at the valve or manifold , when the hoe is off use a male female connection and just feed the circuit back into itself to complete. I can help explain further if you need help.
This is something that has been on the back burner for a while, Have a Kubota 8950 its loader is running on the 4 ports on the back to my knowledge this was common in the older days of tractors. Need to check with dealer and see what kind of kits they have for this tractor. Would be nice to get the loader running on a joystick freeing the back up. Looking at getting a flexwing cutter disconnecting those hoses is a pain. For hay work normally just pop the two out that run the front no pressure easy to get back in. Have also been looking at the hydraulic multiplier using 2 of those. Would be cheaper I am sure
Dave, awesome video. Wish I would have seen it before I had the dealer install rear remotes on my L3400 (15 years ago). Where did you get the tee adapter for the tank port? I've been looking for one with no luck to reconfigure. The dealer put a hose to my hydraulic fill and it's very annoying. It not only makes it hard to add fluid but it also gets in the way of my top link so hoses rub.
Hi Dave, well done. One of the best explanations on tractor hydraulics. I recently bought an Kuboto L2850D (1993), which has only the rear lifter hydraulics. A backhoe is installed with its own PTO pump/hydraulic-system. As I want to expand the hydraulic system - both rear and front - I wonder what the thread dimensions are on the manifold block. On the first sight, it looks the same as yours. Secondly, I contemplate to install only one spool valve block and as I expect working either on the front or on the back, a kind of switch should be installed. What do think? Thanks in advance. Regards Heinz, Germany
the threads on these are weird mine was a pipe thread I believe it was 3/8 NPT national pipe thread. some of the tractors have BSPT british straight pipe thread. you best bet is remove the block and take it to a local hydraulic shop. they can measure it exactly and sell you exactly what you need hoses and all. I like the J.I.C pipe thread connectors I also like the "o" ring style hydraulic fittings. so if you find out yours is a national pipr thread which is a tapered thread convert it right away with a NPT to JIC or something more user friendly. my reason for saying this is the NPT being a tapered thread does not handle removal and install more than a few times. this can be a problem. for example right now my tractor is in pieces and the JIC fitting came right apart easily and will go right back together and not leak, the NPT not so easy and likely will leak. you cant hardly have to many spool valves on a tractor. I always thought all I needed was two on the rear. I was wrong I wish I had three back there. I may add one at some point. I love the top and tilt and that requires two spool valves. a third would mean I could build a small dump trailer and have the third spool valve power the dump cylinder. or run a sickle mower boom, post driver or maybe any number of other things. you can always run hoses from the back or front to power various things. snow plows on the front with up down and side to side angles would require two spool valves. anyhow I hope this helps and if I can be of more help just let me know. I love helping my brothers around the globe! Peace Love & Respect to you and your family Dave in Virginia USA
Hey Dave Great video. Have mx4800..Is it economical to buy a spool valve kit for say rear hydraulic top link like you have? Are just buy all the components and put together myself. Thanks for your input. Be blessed.
Hi Dave. I am looking for the type or name of fittings you used on your manifold block for the lines coming from your front end loader and the line coming from the rear of your tractor. Those line lead to your back to tank port on the manifold and feature and T-fitting and some type of fitting connecting into the block. What type of T-fitting is that as well as the fitting you used to extend the T-fitting out from the block?
the manifold block on mine has a national pipe thread. I actually changed it from this configuration to another configuration that works better and protrudes less. I can email you a picture if you contact me via email at Daveknowshow@aol.com the fitting I used was a 3/8 NPT male to 3/8 JIC female adaptor which connects to a 3/8 jic T connector with 3 JIC male fittings which the hoses hook into from the loader and rear remotes back to tank lines. if you would like a picture of what that looks like just email me and ask for the pictures of the manifold. I will be happy to send them ASAP.
Thank you daveknowshow for an excellent video, I have a problem with my excavator I posted a Video on my channel, the spoolvalve featured in the video only work in only direction, should i pull it apart or just order a new"used"?
pull it apart! more likely a broken spring bad Oring or something that has the port clogged up. could be as simple as trash in the valve. pressure relief stuck open or even linkage issues can also create this problem.
Great video. I have a question. I currently don't have rear remotes. I want to add a spool valve with 2 levers and 4 connections but not sure what type of lever valve I will need. The function will be to turn on and turn off a external hydraulic motor. The motor is on a 3pt small potato digger that drives a potato chain. It will need to stay on when I engaged the valve lever and turn off when I disengage the valve lever. I know there is detent, not detent, etc....
a detent style valve may work although during a bumpy ride the valve may spring back from the jolting and that would shut the motor off. I would try contacting Brian Brooks over at brooks ag parts and see if he can help you select a valve. you will need to know the flow rate of your hydraulic system which is listed in your owners manual under specifications try this number for Brian tell him I sent you there from youtube. 513 715 0532 if he cant nail down a valve for you try surplus center hydraulics get the number online. if that dont render any good results for you let me know and I will try to help you figure out which valve I would use if I was doing it myself on my machine. hope this helps. Dave
Thanks a lot for this lesson. Well done. Can you tell, what sizes of the threads at the ports of the manifold block are? Mine is a Kubota L2850D (1993) without any additional hydraulic control valves.
more likely on that year tractor its a 3/8 NPT my suggestion is take it to a hydraulic shop and let them check the threads. if it is 3/8 NPT thread "national pipe thread" then get an adapter and change it to either J.I.C fittings or "o" RING boss fittings. the J.I.C is the best. they cost more but well worth it.
Great video. You're video has helped me understand how hydraulics work. I have a question about when would you add a cooler and where would you place it in the line?
you always want a cooler if you are using the hydraulics a lot for say a front end loader, backhoe or something similar. all of these tractors come from the factory with a cooler installed. I merely left the cooler out of the circuit merely to save time and space. but the cooler is there located at the end of the circuit just before the fluid dumps back to tank for further cooling before the next use. the cooler is physically located in front of the radiator on most tractors. make sure you keep it clean. check it often when mowing or brush hogging as they get clogged up and can cause thermal break down of the hydraulic fluid. thanks for a great question. you are the first to ask which surprised me it has taken this long for someone to point out that I left the cooler out of the circuit.
Thanks for this great video. I don't fully understand though... I just purchased a 2022 Kubota B2601 and the power beyond port goes directly to the tank. I watched some videos of how to add rear remotes and they just take that line off and utilize it for rear remote spools. But that doesn't seem to line up with this video that always shows the PB going to the 3 point. In my head somehow the power beyond has to have pressure against it otherwise it would just relieve all the pressure in the system going straight to the tank, right? I mean I know that seems right to me but somehow it can't be? Thanks for your help!
Yes it bypasses straight to tank until you move the three point lever. Then the pressure increases due to load. Once three point is in position and is satisfied via the feedback rod the valve reverts back to dumping to tank. In other words the three point control valve dumps to tank and is the last valve in the circuit. Also when no spool valve is calling for fluid power the system shows very low to no pressure.pressure is only present when fluid is place into a path of resistance. As in into a hydraulic cylinder. I hope this helps
@@daveknowshow Thanks for your explanation! That definitely helps. I also learned that when folks called the line on my tractor that goes from loader valve PB port to the 'tank' it is actually going to the 3 point first, as you're saying. That helped clear things up for me, too. It is a little hard to understand how there is little to no pressure in the system normally, but when something calls for fluid somehow pressure appears. Sounds like magic to me lol. Thanks again!
Thanks you for your knowledge, Can you answer a question. I had to replace my pump on my tractor because something caused it to continue to spin the nut off that holds the gear on to the pump. Which caused the keyway break or ? Needless to say my new pump has done the same thing. Can you tell what is wrong, this cost to much to continue to do this. FYI I am new to tractors but have needed one for 15 years. I have small mini farm. Thanks in advance
ok so this is just a theory so take it for what its worth. its my understanding these pumps run continuously as long as the tractor motor is running. the faster the rpm of the motor the faster the pump turns. this is one reason its important to run at 540 pto speed or higher specifically on HST model tractors. my opinion on what is happening to your tractor is this. when the pump is spinning its under near zero pressure as its in an open center hydraulic circuit state. the hydraulic fluid runs freely under zero or near zero back pressure from the pump through the circuit and back to tank as the diagram shows. its only when we use a function that pressure occurs due to its use. or in the event of some type of blockage. for example the soft low pressure return line could collapse and cause a restriction in the flow which would increase pressure and hold that pressure for far to long. additionally a hydraulic filter could collapse internally or have some other obstruction that is stopping the flow causing long term extreme high pressure. when ever you remove a filter look inside the port where that filter goes in and inspect it for chunks of metal to large to come through the port. on rare occasions casting debris from the rear housing can break off and cause a block in flow. also a relief valve that will not properly open will also restrict flow and can cause the same problem with pump failure. I hear people adding shim packs to increase lift capacity and many times that is a recipe for disaster. you could install a pressure gauge on the lines used for "back to tank" and also "power beyond" as well as one line going to the curl cylinder on the front end loader. check these gauges for abnormal reading. the back to tank would in my opinion read near zero with little pressure. " I could be wrong on that so ask your dealer" the power beyond should read the same when nothing is being used. the one going to the loader function should read zero when not used and go up to the rated hydraulic pressure of your tractor when the valve is open. holding the valve open and after the bucket is fully curled the pump should get a little louder and the pressure meter should remain at or fall below that constant measure. if the reading continues to rise you have a faulty relief valve and it should be calibrated or replaced. be sure and check the return hose that feeds the pump as that hose can collapse and cause restrictions that would increase pump pressure that the relief valve would have zero control over to relieve. additionally a crack in that line can introduce air in the system at the pump and cause cavitation in the pump which raises pump temperatures to extreme measures where failure would occur. again this is purely my opinion based on logic and my limited knowledge of hydraulics on tractors. a good service shop manual for your model tractor would be very valuable to diagnose these issues I have talked about. I have given you some very good concrete concerns to address. take these questions to another person who is a certified Kubota technician and get their opinion on these theories. NOT ALL KUBOTA TECHNICIANS ARE WELL EDUCATED. find one or two or three and get their opinion and compare. Northern tool has hydraulic gauges cheap. the plumbing fitting can be pricey but far cheaper than a new pump. buy three gauges and install them all three. turn on the tractor and write down the reading. do it quickly don't let the tractor run to long and burn up another pump. I hope this helps and I wish I could be more helpful with an absolute fix. I live in chesterfield VA 23838 if you are close by me I would be happy to come by and see what the pump failure looks like and where I would install the gauges. I would like to see the pump and gear that failed. you can email me a picture to Daveknowshow@aol.com
Hello Dave I have put a three port spool valve on my L4400 Kubuta I do have a front end loader on the tractor with a 3rd function valve.The problem is everything works all but my 3 point hitch! I have unhooked the spool valve and hooked back up as it was before I installed the spool valve the 3 point hitch works great. So I rehooked up the lines as your video 3 point hitch will work if activate the spool valve as soon as you release the lever the 3 point hitch will stop moving so can you tell me what may be going wrong? P.S your videos are very helpful Thank David Grissam
sounds like the power beyond line and the back to tank line are reversed. study your spool valve and identify the power beyond out let port make sure that line hooks into the power beyond port at the manifold block. make sure the back to tank line "if there is one" is hooked to the back to tank port at the manifold block or anywhere in the line just before the manifold block. also check to be sure the flow is correct on the new valve. the line coming out of the third function valve should hood into the inlet of the new three spool valve. if you are still stumped you can email me pictures of your valve and a copy of the model number, brand and instructions and I will help you the best I can. my personal email is Daveknowshow@aol.com
Merry Christmas !Nice video Dave mostly i agree but i dont think hydrostatic or better closed center loop hydraulics has same diagram as open center loop. My japanese hst tractor has a closed center loop, a cast iron manifold placed in right side near under foot pedal with 3 ports( high pressure -low pressure and return pressure) low pressure is also return so both are T and one is P( power beyond) Connecting 2 hoses with FL control valve from tractor in High pressure and low pressure everything works( loader -3point everything) Connect 3 hoses or 2 hoses with different connection nothing works or works only FL and no 3point and opposite. So my question is if i want to put a backhoe i just connect with a T part the power beyond from the tractor valve to backhoe control valve ? Or need something more? Also my tractor manifold where the relief valve has an adjust screw in two levels stamped O and S , when is in O the loader dont work, when is in S all works.
my tractor is a hydrostatic as well and its set up exactly like this diagram. the backhoe that comes from Kubota is set up to only have a power beyond input and a power beyond output. there is no back to tank port. I think when your manifold is in 0 position that is for when your tractor is delivered with no front end loader and it diverts the fluid in the manifold past the relief valve and up to the three point. when its in the other position it diverts the fluid out the main out port to the front end loader control where it uses the relief valve there first. then exits through the power beyond and returns to the manifold at the power beyond input of the manifold block then past the relief at the manifold block. if you add a backhoe you extend that line to the rear of the tractor and then back to the manifold and into the power beyond input port at the manifold block. when the back hoe is not on you simply plug one hose into the other at the rear of the tractor. this completes the loop. I would say your tractor is also an open center design. fluid is constantly flowing from the pump to the control valves to the hydraulic cooling radiator and back to tank when no control valves are operator. when a valve is operated it becomes some what of a closed center as it diverts fluid to the hydraulic ram. if pressure builds to high the relief opens and dumps the fluid under low pressure back to tank. if I can help in any way please let me know. there are other videos on my channel that show the line from the front end loader controls power beyond port to the rear of the tractor for the backhoe and then from the rear of the tractor back to the manifold into the power beyond input port. those videos may help you as well. EDIT: the answer to your question is NO you do NOT connect with a "T" fitting to the power beyond port to feed the backhoe. you disconnect the line and run it back there. then a new line from back there at the backhoe to the manifold PB port.
Great video. Like what another person said, pictures help, great diagramming ! Now I understand my hydro system. Last fall every time I got a chance to go down to the creek and work on crossing or removing evasive brush, I would spring a hose leak and was done, until the nephews could replace the hose. My wife told them this winter when they go caught up, we wanted all the hoses replaced and they did :-) ......do you think being over 20 yrs. old would have any thing to do with it ? Vic :-)
they served a good long life at 20 years mine is about 14 years old she has sprung a leak on the backhoe once and the front end loader. the sun gives them a beating to I guess. hope you are both doing well. think of you often. take care. Dave
Yes it is, you must keep it waxed, because it always looks like new ? Mine use to get waxed a couple times a year, back when I could, I don't even know when the last time it saw wax.
actually I have never waxed this tractor. I do wipe diesel fuel over the hood when it spills or where ever I need to remove heavy grease. I have power washed it a couple times . I may try and wax mine this spring. been sick with a terrible cold the last few days so I been unable to get online just too sick. I wanted to answer your comment so I popped on for just a few minutes. hope you are both feeling well.
Thank you Dave - I've got a walvoil 2 spool valve with a joy stick running a FEL on my L2600 and it's booger'd up somehow. Asked a guy to re-build and now on "float", the bucket is floppy...useless. I have a question though - on the PB circuit back from the spool valve - to the manifold block - is that a straight pass-through to the tank? Much thanks -
yes and no. not so much "straight to tank" it makes one more stop. it hits the three point lift to be available pressure if the three point calls for it. if the three point does not call for hydraulic power then yes it dumps straight to tank after it goes through the cooling radiator to reduce the temperature of the fluid. hope that helps. note also in this video we do NOT show the cooling radiator for the hydraulic system. it simply was not needed to explain how the system works.
Best video ever! Thanks! One question why does the 3 point lift does not have a relief valve? Also the back hoe does not seem to have a relief valve. I am new at this. Gr Reza
actually the three point does use the main relife valve as its relief protection. same with the backhoe as well. additionally the loader control valve also has a relief that is set higher than factory spec and will kick in should the main system relief fail and the pressure exceeds the factory setting of the loader valve which is typically 3000 psi
@@daveknowshow, thank you for your time and good explanation. Hope to see you in person one day in Belgium. I hope I can show you my kubota mk5000. Gr Reza
Man you have no idea what a service to mechanical geeks you are providing - I have been trying to understand hydraulics for a year - this is by a hundred miles the very best video - I thank you and I salute you you are a fantastic teacher and should do it for a living. love your channel.
I'm always thrilled and smiling from ear to ear when I hear from folks that these videos have served to help my brothers and sisters better understand in a down to earth way with no fancy verbal gymnastics to cloud things up. I like to give every tutorial a big old K.I.S.S " KEEP IT STUPID SIMPLE! " thanks a million for the kind words! peace love and respect Dave in Virginia!
Totally agree - I learned more in 18 mins here than months of internet reading - thanks heaps
That was exactly what I needed, Dave. Thank you. I’m going to add top ‘n tilt, and I was feeling pretty much lost. Great job.
awesome! I added top and tilt spool valves on mine. you can see that series on my channel as well. since I uploaded the series many people have done theirs the same way. so far mine is still holding up and functioning great. glad to see folks getting some value from these videos. peace love and respect Dave in Virginia!
I have been reading and watching videos for about three solid days to try and figure out exactly how to plum in an electric over hydraulic third function valve. I finally grasp just how the power beyond function works. But I had to do a ton of research to understand it. Your video made it super simple and I wish I had found it sooner. This is a great resource for anyone who is not well-versed in all things hydraulic.
thank you I hope this video gets shared so others can benefit from it. there are several very informative videos on this channel pertaining to tractor implement set up and use. I'm sure you will find them helpful as well.
Excellent explanation, Dave. Thank you for covering those of us that are “Slow but steady!”
glad to help
Just did a quick refresher - still best video on hydraulics on utube thanks again 12 months later.
thanks much appreciate the kind words!
Thanks a lot!!! This video is spot on. I was able to install a 2 spool 4 way control for an add on rear flail mower on my Kubota tractor. Now I can cut ditches and around ponds. Thanks Dave.
excellent always perks me up to hear these video help folks. thanks for sharing that with me. peace love and respect. Dave in Virginia
Pictures say a 1000 words. Thanks for describing how it works. I've learned a lot from your videos and enjoy them. Thx!
always a pleasure to help my brothers and sisters out there in youtube land! peace love and respect to you and your family. Dave in Virginia
Thanks Dave! We all enjoy seeing another video from you!
thanks Joe, I hope I can make more if the weather ever breaks. one day its 70 here the next day its snowing to beat the band! crazy weather! enjoy looking at your videos as well brother. hope you are doing well.
Many thanks Dave! We still have very high snow banks here. So to say, warm weather is not there yet! Cheers!
Today I'm gonna try to install the top and tilt I got from the dealer. It did not come with instructions though the service manager said that he would be available to phone consult with during the installation. This video is hugely helpful. Explaining that the hydraulics are in series clarifies the circuit, especially for me as an electrician. Thanks as always Dave!
Bay Area Sparky so glad this helped very excited to hear you are getting a top and tilt. You will love it!
Hi Dave. I was making good time on the installation but the kit I got from the dealer was missing the bracket which holds the linkage and levers atop the tank and below the control console plate. So I sewed things up and used the box blade the old-fashioned way, climbing down to make hand adjustments on the fly. I sometimes wonder how they tolerated hopping up and down from the tractor until I remember that they used to have to hook up a mule/horse/ox and that a tractor, even with hand adjustments was probably pretty damn convenient!
I'm getting ready to install rear remotes on my L4400. This was a great help. Very clear and well explained. Thanks
thank you for stopping by if I can help in any way just let me know. I will do my best.
Thank you for making this video- I’m a slow learner so I need to watch it several times
watch it all you want to. after seeing this and understanding it my series on adding rear remotes will be easier to follow. glad to be able to help. I have a learning disability myself so I try and make videos easier for even me to understand. thanks for the kind words and for watching. peace love and respect
Dave, I really appreciate your intelligent, smart videos. Also your use of the English language is very good!
thank you Ron, I have my moments. Sometimes I fail miserably and butcher things up really good. ha ha
Great videos, I’m getting ready to try to install one on my tractor. I’ll probably be coming back several times to get info from yours. Good to see a fellow Virginian on here.
heck yeah Virginia is for lovers! good to have you here! if I can help in any way just let me know.
Single handedly the best explanation of hydraulics I've seen. Thank you sir.
always a pleasure to help and share information.
Thank you so much for this. I had a lightbulb moment piping up a front loader as soon as you said everything is connected in series. Relocated 2 pipes and had it working straight away after your explanation. 👍👍👍
AWESOME! I love when these videos are found, and they actually help folks. there are a lot of information packed videos on the channel. when you need it then its nice to have it there available. really appreciate your kind words and time stopping by and writing to me.
Once again a KISS approach wins the day. Great video on a topic that is too often misunderstood or not fully understood can now be usefully understood. I would say a great video and a job well done. Thank you sir.
awesome brings me a lot of joy knowing some of my videos do help a few folks along their journey.
Great video! Thank you for putting this together it is extremely helpful. I'm so grateful that God gave us folks like you.
I'm so glad you enjoyed it. if you need further assistance I will try my best to help.
Nice Dave! Its always easier to follow with visuals, well done.
thanks brother I hope it helps some folks.
Thank you. You answered several questions on how to add spool valve controled rear remotes on and old tractor
glad the video has helped.
Perfect! Thank you! Using this video, I'll be able to understand how to install top and tilt for my box blade.
yes in deed and you will love having top and tilt hydraulics!
Probably saved me hours and hours of troubleshooting. Fixing up an old, somewhat neglected Kubota L235. I discovered an aftermarket aluminum hydraulic adaptor block, but I don't have a front end loader. Also the 3 point lift isn't working yet. I've absorbed all this info and I'm certain it's going to come in handy. Thanks!
I have no doubt in my mind this information will speed things up for you.
Good to see another video produced! Always enjoy and learn from your teaching. Praying your strength is holding up.
I'm trying to push forward. been a crazy winter 70 degrees one day snowing the next. hard to get outside and do anything.
This is great, I wasn't sure if my backhoe output would be tank or back into the PB line. I'll double check the valves on the unit, but I think it'll just splice inline with the PB circuit as you show. Thanks again, I was planning on doing this today or tomorrow, great timing!
man that is so great to hear! I'm thrilled this video and my other many videos have helped so many people. its comments like this that make it all worth while! please feel free to share my videos on your social media outlets. thanks for commenting and I hope you will subscribe if have not already.
Well done - I'm a complete novice, and this was crystal clear. Thanks.
thanks for the kind words and I appreciate you stopping by my channel to watch a few videos.
Great to see you posting a new video. Been watching and waiting! Thank you
thanks so much for waiting on me. I hope to make some videos soon. been a bumpy winter. I still have plans and still have dreams I'm not dead yet! lol
Excellent job Dave, that does help a lot ! Thanks
super excited to launch this video as I know it will help a lot of folks who are apprehensive about venturing into hydraulic tampering and modifying. its still a big job and likely worth every penny the shops charge to do this type of work.
Excellent video! Thank you for the clear instruction.
glad you enjoyed it. I'm working on a new series to show how to add a third function valve set up for less money than the typical wrlong , or landpride system so stay tuned!
Thank you for taking the time to help all of us.
always a joy to lend a helping hand
Thank you, makes sense. I'm thinking of adding a spool valve to the back of my JD990 to run a thumb on my backhoe. This helps me understand the process and what to look for.
JD990 WOW that was one of my favorite tractors ever! a real beast of a bare bones tractor. I always wanted one with a BH I had its baby brother the JD 790. I'm glad you found this video I think it will help a lot of folks. of course I'm sure the dealers are pissed that I posted this as they will be losing work.
Maybe they will, but if it saves a few bucks in our pockets and we're capable of doing the work, why shouldn't we? I just subscribed, looking forward to your next video.
thanks brother appreciate the sub! I already subscribed to you in case you put up a few videos of that jd 990. love to see it in action!
i dont have a bucket and was struggling to understand how to do the rear remotes this video gives me the information i need thanks
Glad it helped
pictures always help. thanks Dave !!
no problem glad to help!
Hey Dave, thanks for the great info glad to see another video from you. I enjoyed it learned something so that means it a good day.
I hear you brother. I learned a few things to. only took 6 tries to make this video. door bells ringing, phone ringing, you got mail chiming on the pc, suddenly had to pee, all sorts of interruptions. lol been one of those adventures for sure. appreciate you letting me post to your page.
LMAO! That is a community and you are a member so please post all you want. I need to thank you for posting your videos on my page.
Backhoe for a 4105 John Deere tractor
Well done Dave. Very helpful for us Newbies Now I can move on to better understand my mini excavator Hydraulic circuits.. Many thnaks for taking the time to pass on your knowledge to the rest of us!
Glad to help, it always brings me a lot of joy hearing from folks that these videos help in some way. I do appreciate you taking your time to leave such kind words.
Dave, Thank you. I appreciate your videos !!!
I was thinking that to add a rear remote I would need to Tee off from the Power Beyond and tank circuit to make it happen. I have both a loader and backhoe setup.
I now understand that it all needs to be in Series to make it all work. Thanks...
yes sir you are correct in series is how it works. appreciate your kind words and glad the video has helped speed up that learning curve.
Great video. Very helpful. Thanks for making this!
always glad to hear the videos helped. thanks for the kind words.
Your video helped us get through a problem we had with our Kubota hydraulic system. Thanks for your knowledge.
super glad to hear when these videos help. that is what its all about.
Thanks for the very clear explanation!
thank you for stopping by my channel glad you enjoyed it. hope you find other videos on my channel of interest to you. have a great weekend.
This is great Dave!
glad you enjoyed it Greg! I'm sure it will help someone out there who wants to venture into adding some hydraulic goodies! really appreciate you watching and commenting.
Dave thank you for making this!!!
you are very welcome, thank you for taking your time to watch it. I hope it will be beneficial to you in the future.
WOW!! Amazing, thank you! You removed all the confusion.
glad to hear that thanks for stopping by
@@daveknowshow Well almost, I'm confused now! I must have done something wrong. I added a spool valve and remotes to my Kubota L3800 and now to 3 point hitch does not function. Would you mind helping? Both remotes work for my stump grinder. Can I PM some pictures?
@@diamondcutter8535 yes email me at daveknowshow@aol.com
@@diamondcutter8535 also just to let you know. Id say you have the tank port and the power beyond port likely backwards. this means your power beyond is dumping straight back to tank and your back to tank is dumping into the power beyond port. its not gonna hurt it but as you can see it makes the three point no longer operate.
Thanks Dave for your quick reply, great diagram, and explanation! fj
glad to help my friend, peace love and respect!
Great diagram! The only thing that I would suggest changing is how you draw the "relief valves" and "back to tank" lines. From your description, it seems as if the the relief valve should be drawn in line with the "back to tank" line rather than off by itself. Thanks.
it actually is screwed in the side of the manifold block on this specific machine exactly where shown. this is where you adjust the shim pack to increase and decrease relief pressure. thanks for the comment.
Thanks for Your well presented explanation on hydraulic Feed & Return to tank lines as being in series
Overlaying the 3 basic circuits was a Great Help by using the KISS method ( Keep It Simple Stupid )
My training has been as a US NAVAL Electronics tech & once You said the Hydraulic Flow is in series that made it much easier for Me to understand Fluid Flow theory & usage
Spool valve & relief valve terms now makes sense
It is funny on how I can relate Hydraulics assemblies too Electronic components
I bought a Kubota L-2501 a couple years ago and a week later a new Backhoe for it
The only 2 things I have accomplished so far is installed the Sub Frame for it & Hydraulic lines from the FEL controller to the rear mounting plate the back down to the Hydraulic block as a complete path
Backhoe is still on its shipping pallet
I don't have a Grapple or other hydraulic implements for the 3 point at the rear, yet, but I have been looking at adding Hydraulic fittings
Question???
Since the system is a Series path is it possible to use the connection points I now have at the rear for the detachable Backhoe to feed a Spool controller or 2 inline from that path when the Backhoe is not connected?
Thank You Again
Ken in Florida
Hey Ken thank you for the kind words. they are much appreciated. yes you could easily connect a spool valve with quick connects that simply plug in to where the backhoe unplugs. or any place on that circuit. some spool valves have a back to tank port and may require running that extra line. I do think as long as you are using an open center spool valve you could easily omit the back to tank port line. just allow the fluid to flow the return into the power beyond line down stream. in my series "adding rear remotes/ spool valve" I installed my valve by simply unscrewing one line at the rear from the fitting and plumbing it into the spool valve. then came out the spool valve and plumbed into the quick connect I previously disconnected from. now the spool valve is connected and when the hoe is off the two hoses plug into each other completing the circuit. I used 1 male one female at the rear so they can plug into each other. this bypasses the hoe and completes the circuit. hope that helps.
Good explanation! Thanks for posting that.
thanks for watching Mark I hope it helps a few folks
Awesome, just what I needed to know to add a Land Pride 3rd function kit with having existing Loader and Backhoe. Land Pride instruction say contact dealer if you have a Backhoe! I will install in series with the the PB loop.
Glad it helped! you are on the right track for success! if I can be of further help just let me know.
Thank you for the explanation really helped me fix my tractor thank you so much
always happy to help.
Thanks Dave, best explanation I have seen.
excellent! I'm confident this will help many folks as they take the journey to install hydraulics. I did a video series on my rear remotes but as I stated it was a bit lacking so this should clear things up a lot. really appreciate the kind words and thanks for taking your time to watch my videos. I have a couple on my channel that seem to be better quality wish they all were. peace love and respect, Dave in Virginia
Good info! Thanks Dave!
glad you enjoyed it brother!
Thanks Dave. This gives a better picture of how the fluids flow. So if a person wants to add two rear remotes to tractor, what kind of average cost would be expected for various parts? As always, nicely done.
this was clear and helped me a lot!
always glad to hear words like this! thank you it brings me a lot of joy to hear that the videos are helping folks.
Thanks Dave, Tthe penny has dropped now! I think I am happy to have a go at adding a spool valve to the back of my Kubota
that is awesome! so glad to hear this! makes creating these videos worth every bit of effort.
Very good explanation and presentation Sir. Thank you very much for this video
always happy to help.
Hi Dave, thanks for the video series, really helpfull since doing something similar. Do you know the thread type of the adaptors that go into the power beyond block? Is it metric, BSP?
no not bsp on mine it was 3/8 NPT into the block if I remember correctly. I tell you this hydraulic fitting sizes and threads can be a real pain in the neck. I'm currently custom building a 3/8 bsp to 3/8 npt adapter and its been a real pain in the butt to iron out.
Thanks Dave. Very helpful and clear.
thanks for stopping by Guy!
Very good video Dave!
thanks Bob I hope it helps some folks. its expensive to get remotes added on a tractor after its purchased. I hope this will give folks the courage to install their own.
Thanks Dave, great explanation
always happy to share and help my tractor brothers and sisters along the way.
Wow, great job, thank you very much!
Glad to help. be sure and check out my many other tractor and other how to videos which are packed with great information! I'm honored to have you watch and share my videos.
Awesome explanation, thank you. I have a small tractor Satoh S370D with a cat 1 3PH and FEL. I wanted to add a hydraulic top link and try to use a 2 spool valve or a joystick to operate hitch up and down along with top link out and in. Are the lower arms of the 3PH usually too integrated to add to a joystick or standard spool valve?
I also want to add a remote filter because to clean my strainer I have to drain all the oil in the system to pull it. Where in the system should the remote filter be added?
great questions but beyond my pay grade. typically the rear lift has an internal hydraulic cylinder and a tad difficult to add a joy stick control for the actual three point. three point lifts are generally power up gravity down and have a position control sensor to maintain height. on mine the two spool valve operates a top link and a tilt link. I dont have the tilt link yet that will be a future purchase. normally the filter is in the back to tank line and on some tractors between the HST tranny and the back to tank return as well as the back to tank line from the three point system. a shop manual for your tractor would shed a lot of light on what you could get away with doing.
Thanks ! Very well explained !
glad you enjoyed it and thanks for stopping by!
Dave, This video is the one that really just put it all together for me. And I was wondering what the best way would be to get the spool valve tank line teed back into the line to the tank-you had that tee on the block pictured right there on the screen for me. (Just need to figure out where to get these types of fittings now). I kept seeing inferences here and there about the 3301 with a Backhoe not being able to add rear remotes, but those seem to be unfounded-it looks like the backhoe if anything, makes it even easier to splice into that PB circuit. THANKS AGAIN DAVE
glad to help, keep in mind you can use the open center spool valve and not install the back to tank line. it will merely dump back through the power beyond port. this eliminates 1 hose completely and no need for the "T". found this out after the fact.
the Tee is an inline npt to 2 #8 jic fittings. the hoses on my Kubota are on the hose ends are 8G *jix or jx depending on manu. the fittings on the manifold are a npt to 8jic if it is an o ring type fitting on your back hoe or other attachment it is a jm or boss fitting it stands for Joint industry council. they are identical to 8 AN that are Army Navy fittings just looser standards. hope this helps
Thank you, sir. I was able to get this all done some time back and it’s been working well.
Great video Dave, Your setup is exactly the same as I've planned for my L3400. I do have one question, doesn't the backhoe also have a low pressure return to tank for the hydraulic fluid coming from the now pressure side of a cylinder?
Michael Grubisha no it uses the power beyond line and simply dumps back into it much like a loaders third function valve has only two lines one in one out. I'm sure you could likely set up rear remotes to work the same way but I have not looked into how to do that or the advantages or disadvantages of a system like that. My guess would be having a back to tank line helps aid in the cooling process of the fluid since it's used once and then returned to tank where as the backhoe theoretically could use the fluid twice as it would use it again at the three point. Of course the three point is not being used with the backhoe installed thus making it acceptable to utilize a non back to tank set up. It essentially uses the back to tank within the three point circuit at the manifold block. Hope this makes sense.
Thanks. Very nicely done!
glad you enjoyed it!
Thanks Dave! This was super helpful for me. I didn't understand exactly how the system worked. Have a good weekend!
took me some digging to figure it out myself. pretty simple once you get a grasp on it. like that new LX very nice!
Thanks Dave!
Great job
Thanks for sharing
Be well be safe
thanks my friend
Thank Dave for this video. I have Kubota B7610, with a FEL. I am adding a thumb style grapple to the bucket, and considering an electric diverted valve in between the boom hydraulic circuit. I wonder if instead, I should tap into the PB port on the FEL spool valve and add a single level spool valve for the grapple?
I would add an electric actuated valve for the grapple lid and plumb it into the power beyond port. I have a video on that here. th-cam.com/play/PLLg8VIC7effpOwLD7Y7d2ghv5nY4-b7Cn.html
daveknowshow thanks! I started watching this series, and will use this approach. Really appreciate it!
So if I do not have a manifold block with aux ports such as a power beyond, can I just put the main in directly into a spool valve and then run the pb from the spool valve directly to where the main in would have went on the manifold block and then T into the tank return with the spool valve?
yes and depending on how you set up the spool valve you may not need the back to tank port. just set it up so that the return dumps to the power beyond out port. this how kubota back hoes are set up. which is why they only use two lines. one in one out.
Daver, excellent video and explanation of how hydraulics work. But I'm stumped and in need of guidance. I have a Ford 800 and considering adding single spool valve kit to divert live hydraulics for a log splitter. How do I run a hose for low pressure/return to the tank?
you can simply have the low pressure return through the power beyond flow or dump it into the tank fill port although sometimes on some machines that option bypasses the filter which is not a good idea. so look into it further. typically power beyond return pressure is low pressure in fact its all low pressure until its being used the pressure build in the cylinder that is consuming it. the rest is simply low flow through on these open center hydraulic systems.
Excellent explanation. Thank you.
I'm here to help in any way I can. thank you for the kind words.
Hi Dave!
Thanks for the video. It really helps younger dudes like me learn things. ;)
Question for you: I have a tractor implement with two remote circuits. How to reliefs in the spool valve reliefs work if -- let's say -- something hits my implement and FORCES my dual acting cylinder to move?
Will the spool valve relieve one side back to tank and draw fluid in for the other side? My tractor doesn't have float or continuous flow (Two positions and neutral). Thanks again, Dave.
Aaron
not likely if it has no float position. typically, the relief in a standard spool valve is 3000psi which is higher than the standard setting on most tractors until you get into the super large machines. this 3000psi is mainly in play when you dead head the valve and the cylinder is at the end of its stroke. if this is a 3 point implement the three point will likely raise since it is gravity down. if this is tow behind batwing mower that may be a good question for Tim Marks over at tractor time with Tim. he uses a lot of batwing mowers and can explain how the hydraulics need to be set up. hope this helps. be sure and let Tim know I sent you there with this specific question so he wont send you back here to ask me. lol hope between the community we can get you an answer quickly.
Thanks for the info that is a very busy drawing but it helps a lot
lol it fits my Busy mind. I'm an over thinker amongst other things. ha ha
Thanks for the videos. I've been watching over and over, and still trying to figure out just how to set up my spool valve. I have a Mahindra 1538, and it has a backhoe, so one set of rear remotes. But I have three hoses on the back. Two (male and female couplers) are on a metal block, and a third hose, longer than the other two, with a male fitting. All three hook into the backhoe when it's on. I take the backhoe off, and take the longer hose and plug into one of the other two so the 3-point works. One is PB, and assuming the other two are high pressure, and tank return. I have a Cross 4Z0052 2-spool valve with an "IN" "OUT" and "BYD" I can't figure out how to set it up with what I have. Any light you could shed would be greatly appreciated. Again, thanks for the vid's and thank in advance for any help.
so basically your new spool valve that you are adding will only be in use when the three point is active correct? in other words when the back hoe is NOT installed. so the hose that goes to the hoe that has flow coming out is the power supply line. the line you plug that line into in order to feed the three point is likely the power beyond port continuation. think of the power supply line as the power beyond out and the line feeding the three point as the power beyond in. the other line is a back to tank port. so the line that has power coming out goes into the IN port of the new spool valve, the out port of the new spool valve will need a hose to run to the back to tank quick coupling at the rear of the tractor, the port on the new spool valve labeled BY or BEYOND will need a hose and connector that will plug in at the rear of the tractor into the port that feeds the three point. hope this helps.
@@daveknowshow Thanks for the reply! I finally got it explained from the dealer...when the BH comes off, the PB gets plugged into the power circuit to run the 3PH. The return is unused. So now I know where to plug in the lines to the valve body. Thanks again, and keep up the great videos. BTW, I have you to blame for all of this in the first place! I was watching your video on how to run a box blade, and you had top n tilt. Seeing that, "I just HAD to have that!" LOL. Cheers!
@@solero7378 you can use the back to tank port with the new spool valve if you want to by just installing a hose with a quick couplin on it and when the hoe is off plug that in. I used the back to tank port on mine.
Dave , great presentation. I have a 2004 Kubota B2910. It does not have power beyond. You have any idea if I can add power beyond?
I want to add controls on my box scraper like you did.
it should have it. I can down load the manual and maybe find it for you. my email is Daveknowshow@aol.com
Dave Thanks
Can you show links to parts used in your installation on suppliers?
I have a Kioti LK3054 which is very similar to the Kubotas.
Thanks again.
I dont have any links my advice is locate a decent hydraulic shop that is willing to help you figure out which adapters you need. some fittings on these tractors are 3/8 NPT " NATIONAL PIPE THREAD " others are JIC style fittings. do a google search for " identifying hydraulic fitting " this will help you be able to identify what you have and build from that. I went cheap because my money is limited. I used a lot of 3/8 NPT premade hose. this saved a lot of money. I still had to convert some of those 3/8 NPT fittings to JIC or BSPT " british straight pipe thread" and also the number 8 o-ring style as well. its a lot to deal with and I simply did the best I could to save money. with that said I likely spent more than I should have but lots less than if I had paid the dealer to install it and get the parts together for me. I got frustrated at times but it was a learning experience. lol
Great video Dave. I was wanting to install a hydraulic top link on my NH TC33D, but the 'factory' kit is over $1,800 just for a single remote valve. I saw your video and thought this would be a lot cheaper option.
I have just one question, I don't have a Backhoe, so I assume just deleting that part of the circuit in the diagram, the process would still be the same? (Power beyond to spool valve, and return to manifold block).
yes you got it!!! just add it into the circuit. very simple
Thks soo much very well explained!!
thanks Barr B appreciate the kind words.
I'll add my thanks as well, but I do have a question, if you don't mind. I just added a 3rd function valve to my L3301 to operate a grapple on the FEL. I am working on installing top & tilt to the box blade as well. My Prince (Wolverine) 2-spool valve does not appear to have a relief valve going back to the tank, as your video shows. Also have no back hoe. From the 3rd function valve, do I now route the PBY out line to the new spool valve and then from the valve to the PBY (green) input on the tractor manifold block? What about the relief valve line back to the tank, that the valve does not have? Also, in this configuration, do I need to install the optional Power Beyond/Closed Center Conversion Plug in the spool valve? Thanks again for your helpful video.
you need the valve to be an open center valve so if that means leaving the plug out leave it out. not sure on that valve. yes you simply run from the power beyond at the loader control to the input of the new spool valve then the output of the new spool valve goes to the power beyond at the manifold block. if you do it wrong you will hear the pump strain as the relief opens and more likely the three point will no longer raise.
Great job ! Thanks
thank you for dropping by the channel
Thanks a lot! I can move forward now.
awesome! so glad I could help. it really means a lot that you took your time to leave a comment. its very much appreciated.
Hi Dave, awsome videos, I have a question for you , I got a backhoe and I am wondering if I can plug into my rear remotes and bungy the joystick to feed hoe valve?
I guess you could but the valve will likely create additional heat on the fluid. its easier to just tap into the circuit at the valve or manifold , when the hoe is off use a male female connection and just feed the circuit back into itself to complete. I can help explain further if you need help.
This is something that has been on the back burner for a while, Have a Kubota 8950 its loader is running on the 4 ports on the back to my knowledge this was common in the older days of tractors. Need to check with dealer and see what kind of kits they have for this tractor. Would be nice to get the loader running on a joystick freeing the back up. Looking at getting a flexwing cutter disconnecting those hoses is a pain. For hay work normally just pop the two out that run the front no pressure easy to get back in. Have also been looking at the hydraulic multiplier using 2 of those. Would be cheaper I am sure
there should be a way to install a power beyond manifold block to plumb out of.
@@daveknowshow I would think so I have seen pictures of the model above it and below it that appeared to have loader working from PB
Thanks Dave!
thank you for watching!
Dave, awesome video. Wish I would have seen it before I had the dealer install rear remotes on my L3400 (15 years ago). Where did you get the tee adapter for the tank port? I've been looking for one with no luck to reconfigure. The dealer put a hose to my hydraulic fill and it's very annoying. It not only makes it hard to add fluid but it also gets in the way of my top link so hoses rub.
I think I ordered it on amazon or I may have got it from Summit hydraulics they are very helpful. give them a call
Hi Dave, well done. One of the best explanations on tractor hydraulics. I recently bought an Kuboto L2850D (1993), which has only the rear lifter hydraulics. A backhoe is installed with its own PTO pump/hydraulic-system. As I want to expand the hydraulic system - both rear and front - I wonder what the thread dimensions are on the manifold block. On the first sight, it looks the same as yours. Secondly, I contemplate to install only one spool valve block and as I expect working either on the front or on the back, a kind of switch should be installed. What do think? Thanks in advance. Regards Heinz, Germany
the threads on these are weird mine was a pipe thread I believe it was 3/8 NPT national pipe thread. some of the tractors have BSPT british straight pipe thread. you best bet is remove the block and take it to a local hydraulic shop. they can measure it exactly and sell you exactly what you need hoses and all. I like the J.I.C pipe thread connectors I also like the "o" ring style hydraulic fittings. so if you find out yours is a national pipr thread which is a tapered thread convert it right away with a NPT to JIC or something more user friendly. my reason for saying this is the NPT being a tapered thread does not handle removal and install more than a few times. this can be a problem. for example right now my tractor is in pieces and the JIC fitting came right apart easily and will go right back together and not leak, the NPT not so easy and likely will leak. you cant hardly have to many spool valves on a tractor. I always thought all I needed was two on the rear. I was wrong I wish I had three back there. I may add one at some point. I love the top and tilt and that requires two spool valves. a third would mean I could build a small dump trailer and have the third spool valve power the dump cylinder. or run a sickle mower boom, post driver or maybe any number of other things. you can always run hoses from the back or front to power various things. snow plows on the front with up down and side to side angles would require two spool valves. anyhow I hope this helps and if I can be of more help just let me know. I love helping my brothers around the globe! Peace Love & Respect to you and your family Dave in Virginia USA
@@daveknowshow Thanks a lot for your explanations. You help a lot.
Hey Dave
Great video. Have mx4800..Is it economical to buy a spool valve kit for say rear hydraulic top link like you have? Are just buy all the components and put together myself. Thanks for your input. Be blessed.
it saved me about 300 bucks piecing mine together. maybe more. I wish I had put three sets of remotes instead of just two sets.
also check summit hydraulics.
Thanks Dave, but could you run from the power beyond out port of the back hoe to tank instead of going back to another power beyond port. fj
you can jump into the circuit any place you need to.
Hi Dave. I am looking for the type or name of fittings you used on your manifold block for the lines coming from your front end loader and the line coming from the rear of your tractor. Those line lead to your back to tank port on the manifold and feature and T-fitting and some type of fitting connecting into the block. What type of T-fitting is that as well as the fitting you used to extend the T-fitting out from the block?
the manifold block on mine has a national pipe thread. I actually changed it from this configuration to another configuration that works better and protrudes less. I can email you a picture if you contact me via email at Daveknowshow@aol.com the fitting I used was a 3/8 NPT male to 3/8 JIC female adaptor which connects to a 3/8 jic T connector with 3 JIC male fittings which the hoses hook into from the loader and rear remotes back to tank lines. if you would like a picture of what that looks like just email me and ask for the pictures of the manifold. I will be happy to send them ASAP.
Thank you daveknowshow for an excellent video, I have a problem with my excavator I posted a Video on my channel, the spoolvalve featured in the video only work in only direction, should i pull it apart or just order a new"used"?
pull it apart! more likely a broken spring bad Oring or something that has the port clogged up. could be as simple as trash in the valve. pressure relief stuck open or even linkage issues can also create this problem.
Great video. I have a question. I currently don't have rear remotes. I want to add a spool valve with 2 levers and 4 connections but not sure what type of lever valve I will need. The function will be to turn on and turn off a external hydraulic motor. The motor is on a 3pt small potato digger that drives a potato chain. It will need to stay on when I engaged the valve lever and turn off when I disengage the valve lever. I know there is detent, not detent, etc....
a detent style valve may work although during a bumpy ride the valve may spring back from the jolting and that would shut the motor off. I would try contacting Brian Brooks over at brooks ag parts and see if he can help you select a valve. you will need to know the flow rate of your hydraulic system which is listed in your owners manual under specifications try this number for Brian tell him I sent you there from youtube. 513 715 0532 if he cant nail down a valve for you try surplus center hydraulics get the number online. if that dont render any good results for you let me know and I will try to help you figure out which valve I would use if I was doing it myself on my machine. hope this helps. Dave
Thanks a lot for this lesson. Well done. Can you tell, what sizes of the threads at the ports of the manifold block are? Mine is a Kubota L2850D (1993) without any additional hydraulic control valves.
more likely on that year tractor its a 3/8 NPT my suggestion is take it to a hydraulic shop and let them check the threads. if it is 3/8 NPT thread "national pipe thread" then get an adapter and change it to either J.I.C fittings or "o" RING boss fittings. the J.I.C is the best. they cost more but well worth it.
@@daveknowshow Hi Dave, thanks a lot for that information. I am going to give it a try.
Great video bud!
thank you sire I'm honored you found it helpful!
Great video. You're video has helped me understand how hydraulics work. I have a question about when would you add a cooler and where would you place it in the line?
you always want a cooler if you are using the hydraulics a lot for say a front end loader, backhoe or something similar. all of these tractors come from the factory with a cooler installed. I merely left the cooler out of the circuit merely to save time and space. but the cooler is there located at the end of the circuit just before the fluid dumps back to tank for further cooling before the next use. the cooler is physically located in front of the radiator on most tractors. make sure you keep it clean. check it often when mowing or brush hogging as they get clogged up and can cause thermal break down of the hydraulic fluid. thanks for a great question. you are the first to ask which surprised me it has taken this long for someone to point out that I left the cooler out of the circuit.
@@daveknowshow thanks for sharing your knowledge with me and others that have problems.
@@waltthon505 always happy to help.
Great Explaination Sir, Tanx.
You are welcome, thanks for dropping by
Thanks for this great video. I don't fully understand though... I just purchased a 2022 Kubota B2601 and the power beyond port goes directly to the tank. I watched some videos of how to add rear remotes and they just take that line off and utilize it for rear remote spools. But that doesn't seem to line up with this video that always shows the PB going to the 3 point. In my head somehow the power beyond has to have pressure against it otherwise it would just relieve all the pressure in the system going straight to the tank, right? I mean I know that seems right to me but somehow it can't be? Thanks for your help!
Yes it bypasses straight to tank until you move the three point lever. Then the pressure increases due to load. Once three point is in position and is satisfied via the feedback rod the valve reverts back to dumping to tank. In other words the three point control valve dumps to tank and is the last valve in the circuit. Also when no spool valve is calling for fluid power the system shows very low to no pressure.pressure is only present when fluid is place into a path of resistance. As in into a hydraulic cylinder. I hope this helps
@@daveknowshow Thanks for your explanation! That definitely helps. I also learned that when folks called the line on my tractor that goes from loader valve PB port to the 'tank' it is actually going to the 3 point first, as you're saying. That helped clear things up for me, too. It is a little hard to understand how there is little to no pressure in the system normally, but when something calls for fluid somehow pressure appears. Sounds like magic to me lol. Thanks again!
Thanks you for your knowledge, Can you answer a question. I had to replace my pump on my tractor because something caused it to continue to spin the nut off that holds the gear on to the pump. Which caused the keyway break or ? Needless to say my new pump has done the same thing. Can you tell what is wrong, this cost to much to continue to do this. FYI I am new to tractors but have needed one for 15 years. I have small mini farm. Thanks in advance
ok so this is just a theory so take it for what its worth. its my understanding these pumps run continuously as long as the tractor motor is running. the faster the rpm of the motor the faster the pump turns. this is one reason its important to run at 540 pto speed or higher specifically on HST model tractors. my opinion on what is happening to your tractor is this. when the pump is spinning its under near zero pressure as its in an open center hydraulic circuit state. the hydraulic fluid runs freely under zero or near zero back pressure from the pump through the circuit and back to tank as the diagram shows. its only when we use a function that pressure occurs due to its use. or in the event of some type of blockage. for example the soft low pressure return line could collapse and cause a restriction in the flow which would increase pressure and hold that pressure for far to long. additionally a hydraulic filter could collapse internally or have some other obstruction that is stopping the flow causing long term extreme high pressure. when ever you remove a filter look inside the port where that filter goes in and inspect it for chunks of metal to large to come through the port. on rare occasions casting debris from the rear housing can break off and cause a block in flow. also a relief valve that will not properly open will also restrict flow and can cause the same problem with pump failure. I hear people adding shim packs to increase lift capacity and many times that is a recipe for disaster. you could install a pressure gauge on the lines used for "back to tank" and also "power beyond" as well as one line going to the curl cylinder on the front end loader. check these gauges for abnormal reading. the back to tank would in my opinion read near zero with little pressure. " I could be wrong on that so ask your dealer" the power beyond should read the same when nothing is being used. the one going to the loader function should read zero when not used and go up to the rated hydraulic pressure of your tractor when the valve is open. holding the valve open and after the bucket is fully curled the pump should get a little louder and the pressure meter should remain at or fall below that constant measure. if the reading continues to rise you have a faulty relief valve and it should be calibrated or replaced. be sure and check the return hose that feeds the pump as that hose can collapse and cause restrictions that would increase pump pressure that the relief valve would have zero control over to relieve. additionally a crack in that line can introduce air in the system at the pump and cause cavitation in the pump which raises pump temperatures to extreme measures where failure would occur. again this is purely my opinion based on logic and my limited knowledge of hydraulics on tractors. a good service shop manual for your model tractor would be very valuable to diagnose these issues I have talked about. I have given you some very good concrete concerns to address. take these questions to another person who is a certified Kubota technician and get their opinion on these theories. NOT ALL KUBOTA TECHNICIANS ARE WELL EDUCATED. find one or two or three and get their opinion and compare. Northern tool has hydraulic gauges cheap. the plumbing fitting can be pricey but far cheaper than a new pump. buy three gauges and install them all three. turn on the tractor and write down the reading. do it quickly don't let the tractor run to long and burn up another pump. I hope this helps and I wish I could be more helpful with an absolute fix. I live in chesterfield VA 23838 if you are close by me I would be happy to come by and see what the pump failure looks like and where I would install the gauges. I would like to see the pump and gear that failed. you can email me a picture to Daveknowshow@aol.com
try read locktite thread locker
Hello Dave
I have put a three port spool valve on my L4400 Kubuta I do have a front end loader on the tractor with a 3rd function valve.The problem is everything works all but my 3 point hitch! I have unhooked the spool valve and hooked back up as it was before I installed the spool valve the 3 point hitch works great. So I rehooked up the lines as your video 3 point hitch will work if activate the spool valve as soon as you release the lever the 3 point hitch will stop moving so can you tell me what may be going wrong?
P.S your videos are very helpful
Thank David Grissam
sounds like the power beyond line and the back to tank line are reversed. study your spool valve and identify the power beyond out let port make sure that line hooks into the power beyond port at the manifold block. make sure the back to tank line "if there is one" is hooked to the back to tank port at the manifold block or anywhere in the line just before the manifold block. also check to be sure the flow is correct on the new valve. the line coming out of the third function valve should hood into the inlet of the new three spool valve. if you are still stumped you can email me pictures of your valve and a copy of the model number, brand and instructions and I will help you the best I can. my personal email is Daveknowshow@aol.com
@@daveknowshow Thank you very much for the help on the new spool valve. everything is working now. Again Thank you!
@@davidgrissam3919 thank you for allowing me to help it was my pleasure and I really enjoyed our phone conversation.
Merry Christmas !Nice video Dave mostly i agree but i dont think hydrostatic or better closed center loop hydraulics has same diagram as open center loop.
My japanese hst tractor has a closed center loop, a cast iron manifold placed in right side near under foot pedal with 3 ports( high pressure -low pressure and return pressure) low pressure is also return so both are T and one is P( power beyond)
Connecting 2 hoses with FL control valve from tractor in High pressure and low pressure everything works( loader -3point everything)
Connect 3 hoses or 2 hoses with different connection nothing works or works only FL and no 3point and opposite.
So my question is if i want to put a backhoe i just connect with a T part the power beyond from the tractor valve to backhoe control valve ? Or need something more?
Also my tractor manifold where the relief valve has an adjust screw in two levels stamped O and S , when is in O the loader dont work, when is in S all works.
my tractor is a hydrostatic as well and its set up exactly like this diagram. the backhoe that comes from Kubota is set up to only have a power beyond input and a power beyond output. there is no back to tank port. I think when your manifold is in 0 position that is for when your tractor is delivered with no front end loader and it diverts the fluid in the manifold past the relief valve and up to the three point. when its in the other position it diverts the fluid out the main out port to the front end loader control where it uses the relief valve there first. then exits through the power beyond and returns to the manifold at the power beyond input of the manifold block then past the relief at the manifold block. if you add a backhoe you extend that line to the rear of the tractor and then back to the manifold and into the power beyond input port at the manifold block. when the back hoe is not on you simply plug one hose into the other at the rear of the tractor. this completes the loop. I would say your tractor is also an open center design. fluid is constantly flowing from the pump to the control valves to the hydraulic cooling radiator and back to tank when no control valves are operator. when a valve is operated it becomes some what of a closed center as it diverts fluid to the hydraulic ram. if pressure builds to high the relief opens and dumps the fluid under low pressure back to tank. if I can help in any way please let me know. there are other videos on my channel that show the line from the front end loader controls power beyond port to the rear of the tractor for the backhoe and then from the rear of the tractor back to the manifold into the power beyond input port. those videos may help you as well. EDIT: the answer to your question is NO you do NOT connect with a "T" fitting to the power beyond port to feed the backhoe. you disconnect the line and run it back there. then a new line from back there at the backhoe to the manifold PB port.
Great video. Like what another person said, pictures help, great diagramming ! Now I understand my hydro system.
Last fall every time I got a chance to go down to the creek and work on crossing or removing evasive brush, I would spring a hose leak and was done, until the nephews could replace the hose. My wife told them this winter when they go caught up, we wanted all the hoses replaced and they did :-) ......do you think being over 20 yrs. old would have any thing to do with it ?
Vic :-)
they served a good long life at 20 years mine is about 14 years old she has sprung a leak on the backhoe once and the front end loader. the sun gives them a beating to I guess. hope you are both doing well. think of you often. take care. Dave
Same here Dave. PS: I imagine being in the barn has helped the hoses last.
for sure. my poor tractor sits outside in the heat of the sun and the freezing cold. has since day 1 its amazing its in as good of shape as it is.
Yes it is, you must keep it waxed, because it always looks like new ?
Mine use to get waxed a couple times a year, back when I could, I don't even know when the last time it saw wax.
actually I have never waxed this tractor. I do wipe diesel fuel over the hood when it spills or where ever I need to remove heavy grease. I have power washed it a couple times . I may try and wax mine this spring. been sick with a terrible cold the last few days so I been unable to get online just too sick. I wanted to answer your comment so I popped on for just a few minutes. hope you are both feeling well.
Thank you Dave - I've got a walvoil 2 spool valve with a joy stick running a FEL on my L2600 and it's booger'd up somehow. Asked a guy to re-build and now on "float", the bucket is floppy...useless. I have a question though - on the PB circuit back from the spool valve - to the manifold block - is that a straight pass-through to the tank? Much thanks -
yes and no. not so much "straight to tank" it makes one more stop. it hits the three point lift to be available pressure if the three point calls for it. if the three point does not call for hydraulic power then yes it dumps straight to tank after it goes through the cooling radiator to reduce the temperature of the fluid. hope that helps. note also in this video we do NOT show the cooling radiator for the hydraulic system. it simply was not needed to explain how the system works.
If your buckets tilt is sloppy it's probably a cylinder problem ( mine just started doing that ..
Best video ever! Thanks! One question why does the 3 point lift does not have a relief valve? Also the back hoe does not seem to have a relief valve. I am new at this. Gr Reza
actually the three point does use the main relife valve as its relief protection. same with the backhoe as well. additionally the loader control valve also has a relief that is set higher than factory spec and will kick in should the main system relief fail and the pressure exceeds the factory setting of the loader valve which is typically 3000 psi
@@daveknowshow, thank you for your time and good explanation. Hope to see you in person one day in Belgium. I hope I can show you my kubota mk5000. Gr Reza
@@thingsbeensaidanddone.2378 that would be awesome!
Thank you for this video!
thank you for watching, glad you enjoyed it and I hope you find many other informative videos on my channel.