I wrote up a method I used for my first set of tires in the Tech Tips section. It involved using a quart bottle with a hose clamped to the valve stem (minus the core); inverting the bottle and squeezing it to get the fluid out. I use RV antifreeze and water in a 2 to 1 ratio.
I used it on the front tires of my Sears GT18 first---it worked okay, but was tedious as the front tires held a gallon of fluid, which required 4 refills per side, allowing about 20% air space.
When I did my HT23 Bolens, I used a long piece of vinyl tubing clamped to the valve stem, with the other end stuck inside a bottle of RV antifreeze sitting on the fender. I pushed the tire in with my knee on the tread area (make sure you have the hose out or the escaping air can bubble the fluid out of the bottle), then stuck the hose in and moved my knee. The resulting suction started the fluid through the tube and it became a siphon. Cut a couple notches across the end of the tube in the fluid so it doesn't stick against the bottom of the bottle and restrict the fluid going through it. BTW, The fluid does leak around the valve stem little--maybe a quarter cup for the whole process.
If the tire is too stiff to press in with your knee, put a jack under the axle and let it down, thus expelling the air; put the tube in the bottle, then pump up the jack.
I find you have to do this technique about twice per gallon of fluid. You may have to "burp" the tire more than that, but you can start the siphon going, and go do other things... just check back every 10 minutes or so.
I recently did it on my Kubota B7100 with 16" rims on the rear, and each tire took 9 gallons. I used a fill hose from a Fix a Flat can to screw onto the valve stem, stuck a piece of 1/4" copper tubing in it, then clamped a piece of vinyl tubing to the copper tubing.
You can't fill the tires completely using this method, but you don't want to anyway. You need to leave some air (at least 25%) to act as a cushion for the tires.
You can use washer fluid the same way if you want--it's cheaper, but I think the alcohol is a little harder on tires than the Propylene Glycol in the RV antifreeze. Plus the RV Antifreeze has rust inhibitors in it and is compatible with plastics, etc.
Edited by Utah Smitty, February 10, 2015 - 10:21 PM.