ASYMAIR.....Fantastic Post....Great Job.....
Glad I caught you before you "Split" her apart....Need to tell you about your hydrostat drive rod...
Was mowing with my 1210, hit a log with deck and it lifted the deck up. Backed up and Did it again....lol.....Any ways, when I tried to go forwards, it was slow. backed up ok, forward slow again. When I backed the 2nd time, tractor went full speed onto some steel roofing I had stacked and hung up. I have NO IDEA why it reversed full speed, but it no longer would move with the pedal. Mine is hydrostat, 4wd.
Here is what happens, when your tractor will not move, 1210 Owners listen up......the tie rod end stripped out and the drive rod is loose now. If you remove the inspection cover, that You had to buy new and look up inside you will see the rod. If you grab it and it does not move you are good, for now. When they built these tractors, they threaded the rod, all the way on, on one end, which left only a few threads to fasten the other tie rod on with. Over time the tie rod (aluminum) strips out and now your hydrostat pedal wont work. You have to split it to repair it. If you got a 1210, you WILL end up doing this, BUT, it's not that bad of a job. If I can do it, ANYBODY can do it.

remove your cover under the tractor, see if that rod is loose.

the rod, notice the direction of tie rods.One end goes left, other goes right. I took the good end, loosened and rotated the rod 1 1/2 turns to give more threads on bad end. Then JB Welded the BAD tie rod on, DONT JB WELD both ends.And put welded end in front, so you can Adjust rod if need be. 10.9" is what the tie rods have to be apart from each other.

Here she is split, yea outside..Before the rod was fixed.

This little baby hides under the tractor, stick a screwdriver in those slots and it will screw out. Tractor WILL NOT split, if its still in, so DON'T FORCE it apart.