Learn Hydraulics - 4/3 Directional control valve

The bubbles allows you to see the direction of flow!
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[@michaelcostello6991]

Very good video. Unique inside view of operating valve. Also nice to see how the indent for location of the spool works. Thanks very much for sharing. mike

[@BROSKOIU1]

I have a problem with retracting rod of the boom cylinder at a new miniexcavator. It's pilot operated spool. I checked everything but the spool itself and the components. When retracting rod into cylinder it is an obstruction as it doesn't let bottom oil from cylinder to go freely back in the return line/tank. After 100 hours , this problem laminated my hidraulic oil and really broke his molecaular structure and turn it brownish dark (Iso VG46) and heats above 80 degrees celsius. Is it posible that somehow the joystick pilot pressure isn't enough to push the spool proper into corect position and the return line is chocked? Maybe the spool spring too stiff? Any help apreciatted. Thanks.

[@mohsenloni1162]

What software was this animation made with?

[@dmisi1]

No software. Real.

[@derekli9336]

clear and nice, very helpful.

[@clypeum5063]

I think you have some Air in your Lines. Might want to vent Them ;)

[@nathanc5300]

I noticed the air as well. Is it normal to have air in lines like this?

[@clypeum5063]

@@nathanc5300 Not normal but possible. The Air will get out automatically If the Fluid passes the reservoir! Until all Air ist gone the hydraulic is "squishy" because the Air is compressable!

[@EOTG_AK]

@@nathanc5300 in this scenario the air helps you visually detect the direction the fluid is moving. Certainly not something you want in a system actually intended to do work.

[@tintlwin3192]

Thank you very much sir. Now I can make out what is what.

[@dmisi1]

Szenzacios! gratulalok!

[@umasankarsahoo1901]

Very very nice video Plz sheir 3/2 Valve video

[@ayanjain5516]

nice video

[@jamzz_cruzz]

Which fluid is used in it sir