First, do you have a service manual? It sure would be nice to have one handy...
Is this static leak (while the tractor is not moving) or does it leak only during operation?
Don't disassemble anything yet, but thoroughly clean the suspected area of leakage.
If a static leak, let the machine set, but check it fairly often to try to determine exactly what is leaking and where.
If it leaks only during operation, run the tractor in an area that won't get it too gunked up, than park it and try to determine where the oil is coming from.
The leak isn't necessarily at the area you see any dripping. The oil may cling to the surface of the axle before dripping.
If the leak is outboard, it's obvious you'll need to pull the wheel nearest the leak.
Now, this is where you really want a manual.
I'm pretty sure you have a bad axle seal. That's the most logical and common issue. You'll have to remove and replace that seal or seals (if is this the cause of the leak).
As I mentioned, you really need a service manual. If you don't have one, try your dealer. He may have a pretty good idea what components need replacing and if you should replace all seals during the tear down
I hope you posted this on the Kioti forum. What I've written is pretty generic. Hopefully you can get more detailed info in that forum.
The picture attached is a Deere 790 front axle...just to give you an idea of what may require disassembly. Don't panic! You only go as far as you need to, not complete disassembly.
Good luck to you!