It's relatively easy, but time consuming.
Just lots of nuts and bolts.
It's also one of those things where things can really only go back together one way - so don't worry about getting in over your head. The diagrams look a lot worse than what it really is.
The final drives are heavy. I did mine the hernia inducing way, and it worked fine.
It'd be a lot more pleasant using a cherry picker though. Especially when reassembling, trying to align the shafts.
It's imperative that you block the tractor properly - take a good look at where that pivot pin is on the front axle to understan how the tractor's going to want to tip, even with both front wheels on the ground - it's not so obvious unless you look at it and think it through.