Problems with preassure and ballasted tires

[TGKY]

I know there is a similar thread recently but I have some additional questions and did not want to hijack that thread- I need some help understanding tire ballast and air preassure and how to apply that.

I have a Kubota l3000dt with the front and rear tires ballasted. The manual calls for 26lbs front on 7-16 ag tires and 14lbs on 11.2-24 rear. All tubed tires.

During the winter I added air to that preassure. We had a fast warm up and now my front tires are splitting. They are dry rotted but still they are splitting.

I have let air out and will replace the tires but i realizes in all this that I may not understand how to properly inflate ballasted tires. Or measure them.

I do always have the stem at 12 o’clock but still sometimes fluid blows out. Also, I tend to get different readings each time.I have tried w 2 different gauges one especially for fluid filled tires and one regular

My questions are
1) with fluid filled tires do you fill them to a lower preassure? How do you know what’s right?
2) why do I keep getting different pressure readings and how do I get some accuracy.
3) why does fluid come out even when I have the valve stem at 12:00. If the shop overfilled, once I get the level below the stem will that stop?

Thanks in advance for the help.

 

[North Idaho Wolfman]

They fill to the same Air PSI loaded or unloaded.

With the Valve stem at 12 O'clock try purging the air out, does it keep pushing fluid or just a little fluid at first, (that's normal), if it keeps pushing fluid out they are over filled and will need drained down a little.

 

[TGKY]

At 12 o’clock it seems like it continually pushes fluid and air mixed. So I need to drain some. Could that be why I can’t get a consistent psi reading?

 

[Newlyme]

It could be the size of the air pockets inside your tires. The smaller the size of the pockets the greater the change in air pressure if even a little amount is removed.

 

[fruitcakesa]

I read on another forum, that before you check pressure on loaded tires, to add some air to clear any fluid that may have accumulated in the valve stem.
I have not tried this myself yet.

 

[North Idaho Wolfman]

At 12 o’clock it seems like it continually pushes fluid and air mixed. So I need to drain some. Could that be why I can’t get a consistent psi reading?

Yes it could.

 

[North Idaho Wolfman]

I read on another forum, that before you check pressure on loaded tires, to add some air to clear any fluid that may have accumulated in the valve stem.
I have not tried this myself yet.

It works the same if you clear the valve by burping it too, so either will work.