Sitting on the seat, there is a hole in the frame of the tractor about where your ankle would be. If you look through the hole, you should see a bolt with a slot in the end of it for a large slotted screw driver. Use a slotted screw driver to rotate the bolt.
Wheel Horse D-180.JPG
My 1974 D-200 has a square headed bolt instead of the slotted type.
Through that hole is a 5/16 share nut with no slot . it looks factory because of the red paint . I can get a 5/16 wrench on it from under neat but can't budge it
Mine is square also. Did you try to turn the square headed bolt/plug in both directions?
It only needs turned 1 complete reveloution to go from drive to tow, or from tow to drive.
Some of my Wheel Horse autos the tow valve gets turned 90* and some get 1/2 turn, and my D is 1 complete turn.
By the way, you got a very good deal for the tractor & FEL!
Edited by KC9KAS, August 23, 2014 - 03:15 PM.