I'm confused on the tire sizes on the table. I don't see Surgeon's tire size on that table either. I looked up the tire size for the industrial tires on a CK35 I'm looking at getting which is a 15-19.5 according to the Kioti website. I don't see that one either. So how do you find your tire size on the table?
Here's some of the Titan tire recommendations. the 15-19.5 is listed
Ballast in the tires or on the wheels adds stability and traction but really doesn't put more weight on the tractor/ loading the rear axle. The ballast box sits rearward and actually transfers weight from the front axle to the rear, pretty much a necessity for heavier loader work, but it also adds weight onto the rear axle bearings and may cause a little more wear to those components etc.. We have both our tires filled and a ballast box or something on the 3pt at all times.
Ps- whats really scary about tractors is the front axle isn't solidly mounted in the front, its pinned in the middle. If you get to the point where you tip frontward and your loader is high enough up, it can also roll you over.
I know this subject has been covered ad nauseum but I cannot find on any of the websites how much fluid to put in a 12.5/80-18 tire. Any guesses?
Glancing at the charts & guessing, (your size is not listed on any of the charts I checked), I would say around 24 gallons.
Yes, you have to remove the fluid: http://www.tractorbynet.com/forums/tires/315245-changing-fluid-filled-tires-how.html#post3821480
Go to post #6.
Your biggest challenge will probably be breaking the bead loose.