Hi Aqib. We created this video with one of our custom built Live Schematic simulations. We've got over 190 simulations like it, and you can interact with them on our website. Here's a direct link to our session on Directional Control Valves, so you can see all the resources we have on that topic: www.lunchboxsessions.com/explore/hydraulics/flow-directional-control-valves

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Glad it helped

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Oh super. Glad you got it figured out. If you had some dirt or grit in the valve, and you can figure out how it is getting into the system, then you could prevent it from happening again. Typical points of entry include filling procedure (dirty pail and funnel), low quality tank breather (it's worth it to get a high quality one with a desiccant for moisture control as well) and scored/scratched cylinder rods among others. - Carl On www.fluidpowerworld.com we did a two part webinar last fall that you can still download and watch re: contamination. www.fluidpowerworld.com/webinar-dealing-contamination-sources-hydraulics-part-1/ www.fluidpowerworld.com/webinar-dealing-contamination-sources-hydraulics-part-2/

We’re glad that you found the video helpful.

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Thanks, haha. One of our programmers made that music. We've stopped using it in our newer videos, because we bought a better microphone and don't need the background music to "hide" how awful our sound quality used to be.

Can you tell us what model of valve you have? It sounds as though your main valve spool is stuck (contaminants).

Santiago Diaz Ortiz it is in the description

We make them from scratch. Our animators draw the graphics in a vector drawing program (like Adobe Flash or Adobe Illustrator), and then write the the software code (JavaScript) that powers the simulation. The simulations run right in your web browser.

See here: www.lunchboxsessions.com/help/what-software-do-you-use-to-make-the-simulations

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Thanks Marcelo. Stay tuned, we will make videos on proportional valves at some point.

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We don't use any program - we make the simulations all by ourselves. You can read more about them here on our company site: www.cdiginc.com/live-schematics

LunchBox Sessions the link doesn't work. what i mean is which program do u use to make these simulations they're realy awesome

I'm glad you like them! Our team of artists/animators/programmers draw the graphics in a vector drawing program (like Adobe Flash or Adobe Illustrator), and then write the the code (JavaScript) that drives the simulation. The simulations run right in a web browser, like any web page. Thanks for pointing out the broken link - I've edited the comment and fixed the link.

LunchBox Sessions Dude your channel one of the clearest explanation and simulations .Good job well done

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Usually they just quit in my experience. Do a compression check.

What other issues would cause a valve not to be able to be manually override?

@@gregpartain4307 they get rusty and seize up

yusuf sayyed it sounds to me like you are describing a circuit that also has a sequence valve (no additional solenoids). Either that or it is simply a matter of two cylinders in parallel and the one that is easiest to move (lower pressure) goes first.

Hi Peter. Thanks for registering. LunchBox Sessions will be open to the public soon. We'll email you when the time comes. Until then, enjoy the KZfaq videos, and let us know what topics you'd like to see covered.

The solenoid itself is only a coil of wire - no moving parts. It can be checked with an ohm meter. If you mean that the entire solenoid valve is sticking, and only works when you tap on it, then there may be some contaminants that are causing the valve to jam. A new valve may solve the problem but only temporarily if the contaminants are still present inside the system/fluid.

I replaced the solenoid and it works as it should thank you. SO im going to see if i can figure what went wrong with the old one..

Raven4122 I've done hydraulic work on heavy equipment and the dusty conditions were the root cause. Change hydraulic filters often! The systems are very sensitive to dirt. It's not something that can you can see. The oil may look clean and still be contaminated. Jim.

Thanks for the advice jim I will take your advice and yes The new solenoid fixed my issue I will be doing a short video since I have found none.. Thanks again..

Not all directional valve include a mechanical override feature. It is an option for some models.