In splitting your tractor: The steps I have used for years:
First step I take is to jack up the rear of the tractor and then place jack stands under the drawbar or final drives if I have the drawbar removed.
Then I place a jack or jack stand under the torque tube.
I then use an engine lift to hold and move the front of the tractor away from the torque tube.
To Remove A Ring Gear From The Flywheel:
I use a cold chisel to drive between the flywheel and ring gear. I just start to move the ring gear and then move the chisel a little and drive it until it moves a little. I work around the flywheel as many times as it takes to separate the two parts. You will have no damage to either parts and I many times flip the ring gear and reuse it after grinding a lead on each tooth.