I have the old corrosive fluid and my valve core leaks. How do you change the valve core without losing the fluid? Where did you get the pump and how easy is it to fill/refill a rear tire? Do you take the tire off the tractor?
To change the valve core, place the valve at the top of the tire.
Use a jack to take any weight off the tire.
Now there are no forces which will expel the calcium chloride out of the tube.
If I was switching to Windshield washer fluid, I would want to know how badly corroded my rims were and would at least want to break the bead and have a good look at the inside of the rim.
I would also invest in a new tubes.
The wheel does not have to be taken off the tractor to even change a tire and even easier to change a tube.
Any small utility pump will pump in the WW fluid. Again, the valve at the top. Tractor jacked up one side at a time. Pump in fluid for a while. Remove hose and let built up air escape and start filling again.
You only want to fill the tire wheel assembly to the top of the rim so there is a cushion of air remaining inside.
Any utility pump will do the job such as this one for about $30 from amazon.
TruePower 12V DC Utility Transfer Pump, 447�RPM @ 5� PSI, 12� Watt - - Amazon.com
If you put your antifreeze on a table, the process will go much faster as your pump is not having to lift the WW fluid to the height of the rim.
Dave M7040