First you have to get over people laughing at you when you buy 80 gal of fluid! Jack up tractor, put valve stem @ 12:00, remove valve stem core. I used my 12 volt sprayer pump to pump in the fluid. I had to remove wand end of sprayer and install air chuck with barbed nylon adapter (air chuck thread to barb). I bought a clamp on air fill chuck to stay on the valve stem. You have to remove check valve from air chuck, easy job! Once you have about a third of fluid in tire, stop remove chuck from stem to allow air that has built up from fluid displacing empty space. You will need to "burp" the tire about three times. I filled tire till I was able to get fluid out of valve stem @ 11:00 and 1:00. Reinstall valve core, inflate tire to 10 percent above recommended rate. Sound worse than it is, I bought one of the valve kits that are supposed to release air with the push of a button, took back after going thru three other kits, none would work. Bad threads on all, made in China. lol Total time start to finish 2 hrs. Getting a total different tractor Priceless! I hated this tractor, but now sweet. Bought 2 tractors same time, both now 18 months old one has 132 hrs other 387 guess which one didn't have the tires filled?