Rear tire leaking rimguard

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Keep in mind the 16000 psi just makes the air as dense as RimGuard so that there is no longer any difference in density, and the two fluids can mingle without buoyancy effects. But they still flow as fluids, and the tire/wheel still rotates around the fluids, stirring them up. The fluid in contact with the inner surfaces of the tire/wheel will move at the same speed as the wheel, but elsewhere in the volume it's going to be somewhere between that speed and zero. Due to friction in the fluids, there will always be some loss of speed as you get away from moving surfaces. In a big enough tire, the fluid in the centers could still be almost stationary.

It would be cool to build a plexiglass test rig that could simulate the interior volume of a tire, to see how fluid behaves under rotation with that air pocket at the top. I may pitch that idea to the next intern I get.... They are suckers for lab projects like that. And in case you think I am nuts, here's what flow looks like inside the annular space between two counter-rotating cylinders in a certain speed range:

Taylor Couette Flows - YouTube

Interesting things happen when you start rotating fluids inside confined spaces.

Now we may know why Jupiter looks like it does. The crush of its gravity along with the heat of its gasses might be causing this annular containment of its gaseous atmoshere. You add the spin to the planet and it sorta looks like the container

 

[s219]

If the density of a gas with sufficient pressure creates a greater density than the liquid in the same container, it could never hold the liquid up? Would it even be possible to over come the density of the liquid without a total intermingling of the gas and liquid under such pressures?

Lets just generalize it to two fluids (which can be liquids or gasses -- don't get hung up on one or the other). The less dense of the two will always be on top, and the more dense will always be on the bottom. If they are of equal density, they can intermingle, but will not necessarily mix. If the density ratio of the two were changed gradually and gently enough through the crossover point, the liquids would trade places very gently. They will settle back out to an equilibrium if left alone under static conditions.

So yes, air pressurized to a higher density than a liquid would fall to the bottom of a tire, while the liquid would go to the top. That's where the 16,000 psi requirement comes in. But that won't lock the air/liquid in place like a solid or cause them to rotate with the tire like a solid. They are still fluids and will still flow. The tire will rotate around inner fluid contents, creating some sort of stirred/sloshed fluid motions on the inside, with speeds varying from tire speed to zero.

That's why you should think about them as two different fluids. The basic physics of the internal flow is going to be the same no matter which one is on the top or bottom.

 

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Lets just generalize it to two fluids (which can be liquids or gasses -- don't get hung up on one or the other). The less dense of the two will always be on top, and the more dense will always be on the bottom. If they are of equal density, they can intermingle, but will not necessarily mix. If the density ratio of the two were changed gradually and gently enough through the crossover point, the liquids would trade places very gently. They will settle back out to an equilibrium if left alone under static conditions.

So yes, air pressurized to a higher density than a liquid would fall to the bottom of a tire, while the liquid would go to the top. That's where the 16,000 psi requirement comes in. But that won't lock the air/liquid in place like a solid or cause them to rotate with the tire like a solid. They are still fluids and will still flow. The tire will rotate around inner fluid contents, creating some sort of stirred/sloshed fluid motions on the inside, with speeds varying from tire speed to zero.

That's why you should think about them as two different fluids. The basic physics of the internal flow is going to be the same no matter which one is on the top or bottom.

Does the shape of the container make any difference? I mean a tire is basically a tunnel providing a space for rotation. What happens when this is going on within an upright cylinder?

 

[s219]

Does the shape of the container make any difference? I mean a tire is basically a tunnel providing a space for rotation. What happens when this is going on within an upright cylinder?

The physics are independent of the container. We're talking about basic laws of nature here.

 

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The physics are independent of the container. We're talking about basic laws of nature here.

Ok gotcha. The more dense fluid will always rotate and fall to the bottom. (except I am having a difficult time envisioning this in a container that was air tight with no remaining air space and how the transfer would then take place ) but hey, it wouldn't be the first time a perceived logic supersedes actual mechanical dynamics for me.
Its like when I first heard that a bullet dropped from the barrel of the gun that was fired simultaneously, that the two projectiles would hit the ground at around the same time. My first reaction was: "huh, that can't be?"
Anyway 219, thanks for being patient with me and remaining a gentleman about it.

 

[Santa Craig Cringle]

My Kioti CX2510 just started leaking green fluid from the rear tire today as I was pushing snow around. First time this has ever happened to me. Have had the tractor three years but only 45 hours on it (I just bought land so I expect to really start putting the hours on)

I didn’t know what to do. Parked it and it was peeing out. Rotated the leak to the top and then got on this thread. By the time I got back out there the tire was noticeably flattening. Decided to air it up to 50 psi and the leak stopped.

Now I gotta watch to see if it’s going to leak air.

I was going to do the 50 hour service myself but if I have to haul it in for a tire issue I may just have the dealer do it. Unfortunately I don’t have a trailer to haul it (yet) but if I have the dealer come get it for service maybe he’ll cut me a break on the trailering.

Timing sucks. I’m getting ready to build a house on that land and I’ve been looking for a good trailer deal to take the tractor out there and brush hog it. Now I’m in kind of a pickle. And of course during Alabama’s snowpocalypse right now my dealer won’t pick up the phone.

 

[beenthere]

How low was the air pressure in the tire when the leak started? Low pressure may have caused the rim/tire seal to break enough to allow the Rimguard to ooze out. Observe how 50 psi solves the problem.
But also, you may have a leak in your tire.. Now is the time to keep an eye on it at 50 psi to track that possibility.

Around here, there are tire repair business's that will come to the site of the tractor to service a tire. Might be a good thing for you, not having to sweat getting the tractor to a dealer. But again, any service doesn't come at a cost.

 

[Santa Craig Cringle]

How low was the air pressure in the tire when the leak started? Low pressure may have caused the rim/tire seal to break enough to allow the Rimguard to ooze out. Observe how 50 psi solves the problem.
But also, you may have a leak in your tire.. Now is the time to keep an eye on it at 50 psi to track that possibility.

Around here, there are tire repair business's that will come to the site of the tractor to service a tire. Might be a good thing for you, not having to sweat getting the tractor to a dealer. But again, any service doesn't come at a cost.

Honestly I’m not sure. I didn’t look before I hopped on. The other side is at 16 psi.

 

[Brown Dog]

Most ppl don’t run enough pressure with fluid filled & they leak around the bead.

I’d think 20psi would be the bare bone’s minimum to keep the bead seated.

 

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Most ppl don’t run enough pressure with fluid filled & they leak around the bead.

I’d think 20psi would be the bare bone’s minimum to keep the bead seated.

The actuality is a liquid filled tire tire should be able to run at any pressure IF the bead is seated properly in the first place.
What happens is and what Ive seen, the installer may devoid the tire of air thinking it fills faster from his pump. He then fails to air up the tire or insufficiently airs up after he fills. The tractor owner proceeds to use his tractor and eventually, the usage of the tractor loosens the seal around the tire
and the stuff begins to flow out. Tire size also comes into play with taller tires more susceptible to this event. Ive always have been a proponent of filling tires with tube installation no matter what the fluid ballast is but seeing the move toward non caustic ballast, this may be dinosaurus thinking on my part.
Ive even seen where the ballast installer airs up one tire and forgets to air the other. Ive measured 6 lbs on one side and 22 on the other. Guess which tire was leaking.
I would follow BD's advice and air your tires to maximum as listed on tire. If you see a middle of tire wear pattern, you can air down a bit especially if ride becomes uncomfortable. If it still leaks, you can possibly have a dented rim or the tire bead itself has been compromised.
From my experience, unless schooled otherwise by family, 18 to 25 yr olds these days are hard pressed to possess a solid work ethic.
They are very good at using their thumbs however.