Hydraulic Valve Body Inspection

[@JeanFrancoisLarinRigaud]

Although I was looking on how to dismantle the valve, your video helped my figure it out from assembly. Thanks!

[@cck1496]

Excellent work.

[@Jrsclassics]

I had my hydraulic valve re sealed on my john deere 6675 skid loader. I added hydraulic fluid and did not bleed after starting I tried forcing the up on the bucket to work because it was hard after forcing the pedal it made a loud bang noise and blew the fill cap off on the hydraulic tank. What did I break or destroy?

[@perry9492]

So are the spools only sealed by a film of oil or is there an o-ring inside the valve body to prevent leaks to the outside?

[@flinch622]

Yes and yes: its a design variable tailored to system fluid, pressure, and cost/repairability. Air controls, for example, are typically o-ring design because air brings moisture and with that corrosion over time Going without o-rings means bores are machined to aerospace tightness. Any erosion/things going egg shaped would be a show stopper. An old body can be saved, but bores need to be sleeved and honed fpr the spool being served.

[@gabrielledacruzfortunato5303]

Como montar a mola da aste

[@roughwater3454]

Are we just going to ignore the fact that according to his precision measurements the spools are too big to fit in the bores lol.

[@yadikls1528]

Hidrolik combin yg tidak ada, kalau bisa , jga d tanbilkan , cara mengatasi hidrolik x yg lemah.

[@flinch622]

Generally, people get into valve bodies because of lost control: something either isn't happening, or won't stop. Very important to check for trash first, then measure. Spools usually tell the story.

[@mihalispantelis4909]

My hitachi 5ton excavator it swings only 1 side and sometimes at all.we replace new pump and now mechanic thinks is the main valve control.something stuck In there.what do you think

[@flinch622]

@@mihalispantelis4909 Before digging into valves... the easy stuff: hoses. Swap if possible, and if problem follows, it is failing internally. [its not a bad idea to change hoses every five years by the way]. A loss of return behaves like a block - regardless of pump pressure. It is also possible trash in a cylinder is behaving like a check valve near the fitting. A chowdered o-ring for example can travel and wind up in places you might not expect. I don't know your machine, but I do suspect a valve problem - something allowing pressures to equalize across two functions, which would mean no movement even if pressure is good. I assume system has a regulator that is allowing proper volume to pass - I have seen cartridge style regulators fool people where pressures look good, but just a little speck of something interfered with operation and movement would just crawl in slow motion because volume wasn't being delivered.

[@mihalispantelis4909]

Thank you flinch you know many stuff about machinery.i am just a owner operator just know the basics.so where do you.live?I am Sydney australia.i wish you were here to fix it for me lol.its been there 3 months now

[@gregalb6985]

you deserve so many more subs,# hiddenjem

[@tinbed11]

Hi I love your videos very informative but I have a problem. I have a gray market half ton Kubota excavator which When I went to clean the control block I took out the spool valves and didn't mark their locations. You cannot get any information or manuals for this unit so I was wondering how I can tell where these valves belong. Thanks in advance. It's a Kubota k005

[@user-TooFast]

My spools get stuck I smoothened them they worked for some days then it got stuck again

[@husseinsteve9085]

i need help from you

[@mk9999758555]

It can not checked by vernier , use micrometer for accurate result

[@rcdogmanduh4440]

Or caliper's which is what he used, and not perpendicular to the bore but his point was made. Measure accurately!

[@mk9999758555]

@@rcdogmanduh4440 caliper has a least count of 20 micron instead digital micrometer has 01 micron .Spool valve OUTER DIAMETER has a tolerance of +_ 3 micron . Then how you check?

[@lakhanjadhav5856]

Lakhan Jadhav

[@johnbrown1568]

So I’ve got a leak at the spring cover cap it’s not a bad leak but I want to fix it anyone know if it’s a seal or something

[@SavageTech]

did you figure it out???

[@johnbrown1568]

Yes I did there’s little O-rings that slide in there with a little dust cover that goes over it. After I took it apart I could see it.

[@SavageTech]

@@johnbrown1568 Thanks, i have the same issue in my jcb 3cx and i didn't know if it would be a simple job.

[@snowman374th]

Same here. So it's just a seal. I'd say on both ends, too.

[@ownthan3556]

Hi

[@arvindsahu7830]

Hindi mein bataen

[@shijiazhuanghanjiutechnolo3997]

Hydraulic valve @t

[@lenzeelzinga5268]

Not accurately measured at all,, wrong measuring tools and procedure.

[@lenzeelzinga5268]

No mention of cleanliness or pre lubrication.

[@michaelboyle1983]

Thanks for the information. God bless you! Have you placed your faith in Jesus Christ, the Son of God, so His righteousness will be imputed to you then you will go to heaven instead of spending eternity in hell for your sin when you die?

[@cornpop7805]

I'm sure this guy is a really nice person, but he shouldn't be sharing his very incorrect information with the world. The clearance between the spool and the spool bore of a hydraulic control valve is concerably less than 0.001" Even the most basic directional control valve has between 0.0001" and 0.0003". (That's from 3 to 8 μm for the metric minded). The tool this guy is using is has a resolution of 0.0005" (13μm). But, its accuracy is 0.001" (25.4μm). The tool is 3x less accurate to evaluate this assembly. Also, a partical of .00016" (4μm) that gets into the closed assembly will cause at least minor damage to it. His attention to cleanliness is horrible and it's really difficult to remove small particles once the get into the valve body. They get trapped in the corners and are incredibly difficult to flush out. Overall, I give him an F- for his skills in hydraulics. However

[@husseinsteve9085]

my whatsapp line

[@tinbed11]

Hi I love your videos very informative but I have a problem. I have a gray market half ton Kubota excavator which When I went to clean the control block I took out the spool valves and didn't mark their locations. You cannot get any information or manuals for this unit so I was wondering how I can tell where these valves belong. Thanks in advance. It's a Kubota k005