Tires Checking air in filled rear tire.

[carpenter383]

I'm pretty sure tire pressure dosen't change with wieght on it, so jacking the tractor up makes no difference. I don't know the scientific reason for it. But I'm guessing it's because the sq inch (volume) of the tire dosen't change with or without wieght.

 

[KiotiDave]

Hi,
Bird is correct. If you take the weight off the tire it will round off or droop a little allowing the fluid to back away from the valve. I almost always check it this way and very seldom lose fluid. Think about it, the weight of the tractor will cause the tire to flatten out on the bottom and raise the fluid level in the tire. The tire should be filled to the top of the rim and the valve at 12 o'clock to check pressure.
Good Luck,
KiotiDave