3 Spool Hydraulic Valve Teardown, Explanation & Rebuild | John Deere 400
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- Опубликовано: 4 июл 2024
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I previously rebuilt two assemblies related to a hydraulic system, which were two Sundstrand Series 15 hydraulic motors. Today I will present to you, the teardown and rebuild process on a 3 Spool Valve Block. I will have a section where I explain the ins & outs of the valve block itself and how it functions!
This specifically, is a Cessna 3-Spool Hydraulic directional valve block. You will find this on various types of machinery and the machine I took this out of, a John Deere 400 garden tractor. A similar valve block can be found in the John Deere 300 Series garden tractors, but that only has two spools.
In this video, I disassemble the whole valve block until I can clean it thoroughly. Once everything was cleaned up I inspected all the internal parts and gave the 3 valve spools extra attention. It is very important that the valve spools have no damage whatsoever. If you do find damage on your spools, due to dirt, grime, or possibly too much pressure within the system, you should replace or repair your spool.
Once everything had been inspected, there was a green light to purchase new O-rings for the complete valve block! With the sizes & links below you should be able to find the proper o-rings for this assembly.
After I purchased new O-rings, I was able to rebuild this valve block in a very short time. This literally takes 10minutes to assemble!!
If this video was helpful, please give it a "thumbs up", comment if you have any questions and consider subscribing.
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Spreadsheet for O-Rings in this video: bit.ly/3o3Bn6F
Product Links:
Lubriplate Assembly Grease: amzn.to/390j66i
Loctite: amzn.to/3P5vp1O
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Watch My Previous Rebuilds:
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Timestamps:
00:00 Intro
00:30 Disassembly Process - Timelapse
04:16 Overview - 3 Spool Valve Block
07:10 Explanation - How Does A 3 Spool Valve Block Work?
12:07 Fittings & New O-Rings
14:06 Rebuild Process - John Deere 400 Valve Block
20:00 Final Result - Outro 
Авто/Мото
Every once in a while I do some organized stuff, then I watch a video like this and I clearly am NOT organized AT ALL!! Buddy, you put a lot of effort and time into this video, this should be a must watch for anyone trying to rebuild their Control Valves. Excellent job.
Thank you for your wonderful comment, I really appreciate it!! It does take quite a bit of time to get all the parts sorted out, but I hope from a viewers standpoint it simplifies the whole assembly. It's not easy to keep things clean and organized, to be honest! Best regards
Really impressive what your doing on the rebuilds and the detailed work you put into your videos. Super helpful to me as I have a 316, two 318s, two 420s, and two 430s. Never will reach your skill level, but your videos will help keep me from going broke at my local JD dealer.
Thank you Charles, I really appreciate it! I try my best to keep everything clean and visible for the videos. Wow, what a collection! The garden tractors you have are very impressive models and they can get A LOT of work done. Dealer prices aren't always the best, since many components are manufactured by various companies. I'm glad I can help and hopefully, I can share even more details on other John Deere's in the near future. Best regards
What a channel my friend, every video i watch my tractor(rebuild) complexity shrinks by alot. You are awesome.
Hey man, thank you so much for your positive comment! It means a lot to me. I'm glad I can share videos with enthusiasts like yourself that will assist with your own project. Remember there are only solutions, no problems😀 Regards Andreas
Thank you,i needed that. I have a control valve that only goes up not down. I will be rebuilding mine now.
I‘m glad this video will assist you with your repairs. Let me know if it works out for you. Regards Andreas😊👍🏽
Great video and explanation!
Hi there, thank you very much for your positive comment, it's much appreciated! Regards Andreas
Great video. Thank you.
Hey Ryan, thanks for tuning in and leaving a positive comment! Regards Andreas
Great Video/Inspiring to be more organized and cleaner...!
Hello Dr. Michael Housman, thank you for your kind words, it‘s much appreciated! Keeping components clean and organized is very important for mechanical assemblies, especially hydraulic valve blocks. A little piece of debris can shorten the lifespan drastically and you obviously don‘t want to forget a part during the assembly process.
Thanks for watching! Regards Andreas
Thank you so much for taking the mystery out of this intimidating job. At present, I am having quite a bit of difficulty finding the particular "O" ring seals for my late '90s New Holland Lx 465 skidsteer. Any assistance would be greatly appreciated.
Thank you so much for your comment, It's much appreciated!! I am familiar with skidsteer hydraulic blocks and I've rebuilt some myself. There are two types of o-rings within a hydraulic block: Metric or Imperial. Once you find out which sizes your hydraulic block uses, you can find a o-ring size on a size-chart.
I would suggest you check out this video: ruclips.net/video/TkHeUoDsyaE/видео.html Where I explain how to measure o-rings. In the description of that video you will have links to Metric and Imperial o-ring charts. I bet with just two measurements either from an old o-ring or from the groove it came out of, you should be able to find the size you need. If you have any further questions feel free to ask!
Regards Andreas
I used to fix a lot of hyd equipment, someimes an O ring or chunks of piston packing would find its way in, remove fittings and inspect
Good comment! O-rings wear just like anything else and this could obviously cause an issue. Especially if the residue or the small bits end up in the valve block or even if they go through the system. I hope viewers will find value in this comment. Cheers
Dude, thank you ...
You are more than welcome! I hope this video helps you out. -Andreas
Thanks for your knowledge. The music editor should adjust the music level down to voice level?
Thank YOU for tuning to watch and leaving a comment! Excuse me for the inconsistent audio levels. In my earlier videos I had some issues, but they have since been resolved with my editing software. Regards Andreas
Thank you once again for your outstanding instruction. I have needed to do this on my 2 Spool for a very long time. I see the part listings for the purchased parts. For me, nothing could be more helpful than links like you did in the previous RUclips. If you cannot provide links, could you say where you purchased the parts?
Hello Ben, thank you again for sharing a nice comment! I have updated the description with a new link, to a proper spreadsheet again! I believe this is a much nicer way to understand the o-rings invloved in this assembly. Since single O-Rings are hard to find online, I added links to specific companies which will carry all these O-Rings. You can provide them with the numbers I listed and they will know exactly what you need. The two spool valve block is setup very similar. It only has two spool valves and it has fewer ports and therefore fewer fittings. You will not need as many O-Rings for your valve block assembly, but I'm sure you can make out the quantity needed. Best regards
@@WorkshopRebuild Thank you. I really do appreciate it!
I'm not seeing the descriptions for any of the JD400 videos so not getting the links for any parts. Same for the 3D printed crown for th esteering box. Your videos are great, very informative and helpful. Much appreciated.
Hi Blaine, I just got back to your E-Mail with everything you asked for in the comment section. I hope these links help you!! Thank you for your kind words, it's much appreciated! Regards Andreas
Hey, thankyou for showing me how to rebuild my spool, I have a john deere 1435 that the spool is leaking, I had bought a good used one (I thought) and it leaked also, I took it to 2 hydraulic shops and they want $450 and $500 to rebuild it, that's what it cost new but seeing how easy it is, next week I'll take one of them apart and order parts, again thankyou.
You are more than welcome and I'm glad you can use this video to fix your valve block. If a valve block needs to be rebuilt, there are certain o-rings and springs that can be purchased and replaced. If the spools themselves show wear or damage, it might be hard to replace them, as these parts are machined to a certain tolerance which will allow the valve spools to seal within the valve block. I'm not sure if your valve block has the same o-rings, but it is very possible. Best regards
But to fix internal leaky valve, they have to spray weld more metal, then turn on lathe. Expensive!
Spray welding is an expensive procedure and for a small valve block like this it might be more cost efficient to find a new or used one. Have you ever sent them out to be spray welded?
I have a NH 655E, and the dipper valve is leaking pressure. Could it be the pressure relief valve? Cant hardly be the spool. That would take metal damage inside, which doesn't make sense. I am taking it apart now.
It's possible you have relief valve springs that aren't to spec anymore and they are releasing pressure before the rated pressure. This wouldn't necessarily cause leaking pressure though.
Your valve spools are what seal your functions (up/down etc.) The valve spools can have a score in them and be toast. The sealing mechanism within the valve block is between your valve spool outside diameter and your valve block internal diameter. If these two surfaces are not to a mirror finish, you can have a hydraulic leak. It's also common to find valve spools with cracks.
If you have any valve spool related damage, you could be in for major repairs and it's usually most cost efficient to replace the entire valve block with a used item or a new item.
Let me know what you find out. Regards Andreas
Great video!! Thank you!!
I have a John Deere 2010with low hours but my bucket tilt does not hold position, it drifts downward. There is no leakage on the cylinder itself at all so I highly suspect it to be the valve block.
You have gotten me over my fear of taking mine apart. Worst that can happen is I need a new valve block. 🤡
Thank you for your feedback, I really appreciate it!😃👍🏽
Before you take apart you valve block, try and see if your linkage is setup correctly. If your valve spool doesn‘t return into the „NEUTRAL“ position it may be allowing oil to pass through.
If an adjustment doesn‘t help you might have issues within the valve block. This could either be a weak bypass valve spring or maybe an o-ring.
I hope this helps and let me know if you figure it out! Regards Andreas
Hi! What do you use for cleaning stuffs? I really enjoy your videos. 🙏🏻
Thank you very much for your kind comment, I appreciate it Zoltan! Before taking assemblies apart I clean them with a plastic-bristle brush and I use water & soap. Once the assemblies are apart, I tend to use clean parts with diesel fuel and dry them with clean rags. After that most of the time everything is clean.
This is time consuming, but it's important to have everything clean before it goes back together. I hope this helps!! Best regards -Andreas
Hey brother, great video. I'm working on a 400 that the power assist only works when I pull and push the inside lever, which also raises the deck. I rebuilt the power steering valve but no luck. U think it's the hydraulic valve?
Hi Jake, I'm sorry to hear that you're experiencing issues with your power assist system! I would assume there is an issue within the valve block itself! You must not be getting fluid to your power assist steering valve. It could either be a stuck relief valve within the hydraulic valve block or maybe a hose that is hooked up wrong!
Here Check out this website to see the hydraulic valve block as a diagram: www.weingartz.com/assembly-diagram/john-deere-parts-lookup/model-400-hydrostatic-tractor-19-9-hp-k532qs-kohler-engine-pc1475-hydraulic-control-valve-tractor-hydrostatic-400/4275-35688-526972
I hope this helps and if you figure out what the issue was, please let me know! Regards Andreas
Thanks so much for the reply. Yea, I was leaning toward the block. The hoses are hooked up properly, but the block is super oily , so it's gotta be the issue. I appreciate your advice and quick response!
If it's oily then you got some old o-rings and that's the easiest fix. It must be a faulty relief valve and I have a good feeling you'll find out. You're more than welcome!
Valves will not push out?? Any ideas?? How hard can you get with them. I am sure they are not available so I don't want to destroy them
I've never run into this situation, but I would try this: 1) remove all fittings and plug from hydraulic block 2) try to inspect all bores and see if you can identify damage or rust around the spools 3) if your valve block was dry, try to soak with brake fluid (this fluid consists of multiple chemicals and will act as a penetrating fluid) after a day or two, try to move by hand again. I wouldn't suggest a hammer or a press, because it should NOT be this hard. If it is, you will most likely damage the machined surfaces internally. This will cause internal leakage in the future. I hope I could help you out and let me know if you made any progress. Cheers
Vidios control Valve forklif Toyota f8 35
Hi there, sorry this is just a general video about a hydraulic valve spool. Most valve spools are very similar, just that they could be bigger or smaller in size and they might have electronic solenoids that activate the spools. Regards Andreas
Ok
Thank you :D
Dude! You need louder volume
Hi Jack, thank you for leaving this comment. In my earlier videos I had some issues with the audio levels and the way I was editing my videos. I have since improved on that and I hope you'll have a better experience watching some of my newer videos. Regards Andreas
Repair hydraulic valve block excavator kato
Hi, unfortunately I do not have an excavator hydraulic block
Please don’t repaint the JD400. It’s already got rly good original paint as it is. It’ll be worth more as a rebuilt 400 w original paint. Gives it patina, & you won’t be afraid to use it as u would a tractor that wasn’t repainted.
The paint job is already planned for the JD400. It is an option to get the mechanical side of things working perfectly, but the JD400 will be redone completely.
A clear coat or even wax finish will come in handy for a future build I have in mind!! Best regards
Music ruined the video , thanks anyhow
I'm sorry that you didn't enjoy this video, because of the music. I'll try to find more appropriate music for my upcoming videos. Thank you for your feedback!
@@WorkshopRebuild
really dont need the tunes , just you teaching is fine
Music is fine. It's the video and instructional content that rocks, pardon the pun😂