Gas tank puzzle

[jon f mn]

I have a gas barrel on a stand for tractor gas.

I've had trouble ever since I got this tank, when it sits there for a few days and you go to get gas the hose is air locked. If you stick the nozzle in the tractor tank no gas will come out. To get gas you need to lower the hose to near ground level and run some gas into a can. When you do that some gas comes out, then some bubbly gas, then good gas again. After that it runs freely into the tractor. The tractor tank is below the level of the bottom of the tank. Here is a short video of what happens. It's not great because it's was hard to do.

Gas tank flow

rumble.com

If you watch closely you can see that at the hight of the tractor tank nothing comes out even tho it's lower than the bottom of the tank. And the tank is full now. Then when I lower it gas comes out, clear first, then foamy for a bit, then clear again. After that you can fill the tractor tank.

Judging by the amount of clear gas that comes out first the air must be caught at the bottom of the hose when it's hanging. I have replaced the hose, filter and filter base and nozzle trying to solve the issue. What I can't figure out is how air is trapped at the bottom of the loop. If you leave the nozzle on the ground so there is no loop there is no air lock. I hung the hose over the valve so there was 2 loops and I got 2 air locks. This is not a huge issue, I'm just completely puzzled by how it happens. Any ideas?

 

[Janicholson]

The tank cap (or other) vent may be restricting the intake of air. The nozzle, being shut off the hose may get warm enough to vaporize the fuel in the hose pushing the fuel back up into the tank. Put the hose in shade! Does it also happen in winter? Jim

 

[jon f mn]

The tank cap (or other) vent may be restricting the intake of air. The nozzle, being shut off the hose may get warm enough to vaporize the fuel in the hose pushing the fuel back up into the tank. Put the hose in shade! Does it also happen in winter? Jim

Not sure about winter, I'll pay attention this year. But why is the air at the bottom of the loop? And why wont it get pushed out even tho the nozzle is below the bottom of the tank? That's what is confusing me

 

[Gene in Mi]

I would remove the vent, let it sit for two days and test to see if that fixes it.

 

[used red MN]

I think it has something to do with the filter, where did you get it? If you shut off the tank valve when you are done using it as the fuel heats up and expands the pressure held in the hose and filter may go up quite a bit since liquid does not compress. This might be causing some reaction or change in the filter media trapping air or vapor in it that has to be purged out for gas to flow through it. This is an extreme WAG. Maybe when done fueling turn off the valve and hold a couple foot of hose at a slight incline sloping down to the tractors fuel tank neck and open the nozzle in an attempt to get a bit of air in the hose. This air may allow some expansion when it heats up and less pressure to build, again WAG.

 

[VicS]

I have a gas barrel on a stand for tractor gas.

View attachment 133040

I've had trouble ever since I got this tank, when it sits there for a few days and you go to get gas the hose is air locked. If you stick the nozzle in the tractor tank no gas will come out. To get gas you need to lower the hose to near ground level and run some gas into a can. When you do that some gas comes out, then some bubbly gas, then good gas again. After that it runs freely into the tractor. The tractor tank is below the level of the bottom of the tank. Here is a short video of what happens. It's not great because it's was hard to do.

Gas tank flow

rumble.com

If you watch closely you can see that at the hight of the tractor tank nothing comes out even tho it's lower than the bottom of the tank. And the tank is full now. Then when I lower it gas comes out, clear first, then foamy for a bit, then clear again. After that you can fill the tractor tank.

Judging by the amount of clear gas that comes out first the air must be caught at the bottom of the hose when it's hanging. I have replaced the hose, filter and filter base and nozzle trying to solve the issue. What I can't figure out is how air is trapped at the bottom of the loop. If you leave the nozzle on the ground so there is no loop there is no air lock. I hung the hose over the valve so there was 2 loops and I got 2 air locks. This is not a huge issue, I'm just completely puzzled by how it happens. Any ideas?

What I do know is it won’t happen if you leave the tank valve open.

 

[Bob Bancroft]

I think it has something to do with the filter, where did you get it? If you shut off the tank valve when you are done using it as the fuel heats up and expands the pressure held in the hose and filter may go up quite a bit since liquid does not compress. This might be causing some reaction or change in the filter media trapping air or vapor in it that has to be purged out for gas to flow through it. This is an extreme WAG. Maybe when done fueling turn off the valve and hold a couple foot of hose at a slight incline sloping down to the tractors fuel tank neck and open the nozzle in an attempt to get a bit of air in the hose. This air may allow some expansion when it heats up and less pressure to build, again WAG.

I agree. It has something to do with gas trapped in the hose/filter expanding, then doing funny things.

 

[wd9garymn]

Jon, i had the same problem years ago and if i remember right if i left the tank valve open it worked ok---never bothered in the winter. I don't use the tank anymore as not using much gas and bulk delivery will not deliver less than 150 gallons--BUMMER, Gary.

 

[Mike(NEOhio)]

Mine does the same thing once in a while but usually when the tank is low.

 

[tractorford]

its haunted. ghost in there somewhere.

 

[Non-farmer]

I was expecting this

 

[560Dennis]

I see Line coming from filter is kinked , is that correct in photo ? Suggest hard piping vertical down , don’t know if this the issue ,worth look see .

 

[jon f mn]

I see Line coming from filter is kinked , is that correct in photo ? Suggest hard piping vertical down , don’t know if this the issue ,worth look see .

There is no kink in the hose, but an elbo there would be good. I'll put it on the list.

 

[cjunrau]

I have a gas barrel on a stand for tractor gas.

View attachment 133040

I've had trouble ever since I got this tank, when it sits there for a few days and you go to get gas the hose is air locked. If you stick the nozzle in the tractor tank no gas will come out. To get gas you need to lower the hose to near ground level and run some gas into a can. When you do that some gas comes out, then some bubbly gas, then good gas again. After that it runs freely into the tractor. The tractor tank is below the level of the bottom of the tank. Here is a short video of what happens. It's not great because it's was hard to do.

Gas tank flow

rumble.com

If you watch closely you can see that at the hight of the tractor tank nothing comes out even tho it's lower than the bottom of the tank. And the tank is full now. Then when I lower it gas comes out, clear first, then foamy for a bit, then clear again. After that you can fill the tractor tank.

Judging by the amount of clear gas that comes out first the air must be caught at the bottom of the hose when it's hanging. I have replaced the hose, filter and filter base and nozzle trying to solve the issue. What I can't figure out is how air is trapped at the bottom of the loop. If you leave the nozzle on the ground so there is no loop there is no air lock. I hung the hose over the valve so there was 2 loops and I got 2 air locks. This is not a huge issue, I'm just completely puzzled by how it happens. Any ideas?

I have the exact same problem. If I remove the filter no issues. Some how that filter system does it. I think because it’s a water trapping filter or they made it wrong. My dad has a spin on filter and never has an issue. I got sick of it and bought a pump

 

[Just-in-Case]

Jon, I think that your filter base is more likely the culprit. I'm guessing that there is some kind of leak/vent action happening somewhere in the metal base that holds the filter. Now, why it has air at the bottom of the hose(?), that is a bonafide mystery. I don't have an answer for that.

 

[Mcrafty1]

I was expecting this

38:39

 

[olddog]

Jon, I think that your filter base is more likely the culprit. I'm guessing that there is some kind of leak/vent action happening somewhere in the metal base that holds the filter. Now, why it has air at the bottom of the hose(?), that is a bonafide mystery. I don't have an answer for that.

Think of the hose as half air over bottom half gas in a captured gas pressure situation.

 

[Mcrafty1]

Nobody tried the puzzle yet? While I don't do these very often this one took me much longer than any before,,,like twice a s long 38:39, ether I wasn't really awake or it had something different about it? idk