That 4 x4 shaft will have a coupling on the rear side of it with a spring, push the coupler to collapse the spring and it will allow the shaft to come off.Be carefull because there are 6- ball bearings inside each coupler (Front & rear)that are going to come out.Once you get it down you will see how it works.There is a groove in the coupler for the ball bearings to fit in
Another thing you want to make sure and do is to make sure you block the tractor at the front axle from pivioting when you split it.If not when you get it to start coming apart its going to fall to one side or the other because the front axle can go up and down.We drive a wood 2 x 4 wedge in each side on top of the axle and frame
If you need any additional help give us a call at the shop we will try to help you 979-865-4002
Tommy
Affordable Tractor Sales
“Your Jinma Parts Superstore”
http://www.affordabletractorsalesco.com