Hydraulic cylinder fluid internally bypassing

Рет қаралды 31,528

FitRite Hydraulics

9 жыл бұрын

Hydraulic testing for internal leakage

Пікірлер: 18

@waynechiles3434 4 жыл бұрын

That is correct. Thank you for taking the time to help me understand that better.

@tomahawkas1 3 жыл бұрын

Thank You for this great explanation

@laneburgess1643 3 жыл бұрын

Great video.

@Drottninggatan2017 2 жыл бұрын

One trick is to have the piston all the way in and only attach the outer port to the tractor, having the inner port blocked off. If the seal is leaking the rod will go out instead of staying in, because of the different areas.

@DieselRamcharger Жыл бұрын

hey thats pretty shmart! thanks, gonna give it a twirl on my mini ex. i got one function thats a bit weird.

@John-gj9db 5 ай бұрын

Yes exactly

@rvadventures 3 жыл бұрын

So my 3025e jd tractor had a grapple when I close it it goes fast when I open it it goes slow, if I boom up and down then it will open fast once or twice then back to slow? What's the issue

@anilpadhy5618 6 жыл бұрын

good example

@waynechiles3434 4 жыл бұрын

Hi, I know this video is is 5 years old, however, it's new to me. That cylinder appears to need piston seals based on the bypass test you performed. It should still bypass in the second test ( cylinder full and full rod extension) you did not have sufficient pressure and time for it to bypass. Think of it like a french press for coffee with only a small pinhole for water transfer.

@FitRiteHydraulics 4 жыл бұрын

It is impossible for the rod to go into the cylinder when it is fully extended and both sides are full of fluid. There is no place for the fluid to move to. There is more fluid on the piston side than on the rod side. The rod takes up room leaving no room for the fluid to move. Even with no piston on the rod, the rod will not retract into the cylinder when there is no place for the fluid to be displaced. Take a full glass of water as an example. If you can put your finger in the glass and not spill any water then what you say would be true, but you can't because there is no place for the water to go other than to spill out. With the cylinder, there is no place for the fluid to go, so the rod can not be retracted.

@janramonmartin 4 жыл бұрын

@@FitRiteHydraulics thanks i am now certain i have a bypass problem with my lift cylinders

@DieselRamcharger Жыл бұрын

when you try to collapse the cylinder the internal volume decreases as more rod is introduced. ole archimedes says that water has to go somewhere! displacement is real.

@waynechiles3434 Жыл бұрын

@@DieselRamcharger That is correct. Thank you!

@n8skow 4 жыл бұрын

did the cat survive?

@lisaviolet_video 4 жыл бұрын

He did. He wasn't too pleased about leaving the shade of the tractor, though.

@ballardstowingandoffroadre2367 5 жыл бұрын

Answer this one please. I have a wheel lift on my truck, It's a Repo Truck. When I tuck in the cylinders( 2 opposing cylinders) in the IN position, When I let go of the switch, The cylinder spits back out about a inch or so !! Kinda like it has "Air" in the cylinders, BUT THEY DON'T HAVE AIR ! I've bled and cycled the cylinder at least 100 times !!. Please help, I can tow a trailer now because of the Loose Wheel Lift head...... UPDATE It ended up being a little o-ring blowed out.. After figuring it out and repairing it. Wheel Lift works great now..

@gregpartain4307 3 жыл бұрын

Sounds like a check valve is leaking off

@R.O.D_OFF-ROAD Жыл бұрын

I have the same problem you did mine is doing that in the piggyback cylinder the one in side the wheel lift that goes in and out were was your o-ring out in the cylinder or valve?