I had been wondering this too, as I had one that was installed and leaked from when the tire guy did the job. New tire, rim and tube, he said it would stop, nope, it leaked and where it leaked around the valve hole in the rim, the diameter of the hole corroded and became sharp, eventually the whole valve stem shot right out of the tube, was checking it, and glad I did, had it happened in the field away from the garage, would have made the job more difficult.
I've often wondered what happens if a CACL2 filled tube in a tractor tire leaked, if the tube chafed or somehow got an internal leak,would the fluid get in between the tube and rim, would the tire lose pressure or would actual tire bead hold tight. Concern obviously is that corrosive fluid getting to the rim always wondered how you would know or if an internal leak is possible.
Everytime I adjusted or topped off pressure in my loaded tires, the fluid shoots out, just have to be quick and rinse down the area after. You may want to get those repaired, only seems to get worse, I had this leak for 5 years and the valve finally popped out about 6 weeks ago.
Never took a tractor tire apart before, broke the bead, used a less than desirable pair of spoons I got at TSC, not even a matched pair, preference is for the drop center type, used the down pressure on loader to break the bead, mis matched spoons to remove the tire which was the most difficult aspect of it, have to be careful not to damage the bead tip, pry up a little at a time and use tire lube or similar to make it slippery. I repaired the rim, plugged the old hole by welding and grinding the inside smooth, then wire wheeled it heavily, painted the affected area with zinc rich galv spray. I followed the adavice of people here, also inflated the tube 1x, then let the air out, re-inflated, just had no time to re-load the tire, there is a real inexpensive valve for this, you can use with a garden hose, napa sells a pump you can power with an electric drill, not goint to be fast, but will cost less than a tire service call. I've since done some brush hogging and towed some heavy logs, funny that side is the one that slips first now, also have to remember to be careful until it is re-loaded, one side being heavier now.
