North Country,
I am definitely not a tire expert. The people that do work on our tractor tires always refer to the chemical as "B" juice, I would guess that is short for beet juice.
I am definitely a little on the lazy side and do pretty much anything I can to avoid removing the whole tire to adjust or add some tire pressure. Handling those big suckers around with the backhoe or some other hoisting device is usually more than I want to get involved in unless the tire needs to be removed from the rim or something somewhat major like that.
Your suggestion of laying the tire and wheel down and possibly placing them at an angle to move the fluid away form the valve stem is a good idea. I will definitely keep that in mind if we are breaking a tire down off of the tractor in the future.
Generally I find it is easier to work on those big tires while they are on the tractor. We call for tire service if the situation allows. They are set up to pump the fluid out of the tire and then with the tractor jacked up, break the tire off of the rim, make the repair and put it back or or put on a new tire if needed.
Due to the corrosive nature of the calcium solution all of our tires that are liquid filled also have tubes. I haven't checked to see if with the "beet" juice you could mount them tubless or not. If anyone out there knows that answer I would be interested to know if the "Beet" juice needs to be in a tube.
Our area is fairly hilly so both front and rear tires are filled with liquid for the added stability factor. Having a lot of weight down low to keep the center of gravity as low as possible helps a lot, especially if you are pulling hard and going up hill and on a slope.
Tire work can be one of the most dangerous things we get involved in on the farm. If possible I like to call in the professionals.
Be carefull out there!
Nick, North West Farmer