For a relatively small investment, anyone can assemble the tools needed to pump fluid in/out of tractor tires. It's well worth the trouble. One flat where you don't loose all the fluid will pay for the pump, ect. There's nothing like the convenience of being able to pull the tractor in the shop (garage?) pump the tire down, SAVING ALL the fluid.
I bought a small "chemical pump" from WW GRAINGER. The volute is stainless steel and the impellor is rubber. 110V with standard garden hose hook-ups. Two 15' long 1/2" garden hoses. A couple 55 gallon plastic barrels. (I do a few bigger tires now and then) And the NAPA valve stem adapter. I even bought a plastic tool box that holds all the "kit" I assembled. Total investment is around $100. A typical 13.6X28 tire takes about 15 minutes to pump down and MAYBE 20 to fill.
A "BEAD-CHEATA" bead breaker, 4 tire irons, a tire hammer, and a few spare tubes/patch kit, and there's my ability to fix my own tires when I need it, NOT at the convenience of a repair man or tire vendor.
Most recent "experience", I noticed fluid shooting out of a nail hole in a tractor tire. Pulled 'er in the shop, jacked the tractor up, pumped fluid out, broke bead, pulled tube, patched tube, re-installed, aired up, let air out, pumped fluid back in, inflated to proper pressure, and was back to working again in just over 1 hour. If you value time, or depend on having equipment that'll be ready to go without downtime, having your own tire repair tools is a BARGAIN.