This week I learned about agcopartsbooks.com. First thing to do, search for my tractor and browse every page! In the table of content there is a section Cold Start Disconnect Kit, page 89. WHAT!
The only thing I could think off that would help starting would be to disconnect the transmission and/or rear PTO shaft to remove this load. The PTO shaft is pretty free to rotate. The only hint I have is the note A about item #10 which is said to be a part from the tractor re-used for this kit. Looking in the other pages I found a similar spring in section Frame, Driveshaft, Rear axle and Drawbar, item #35 has the same part number. This kit would remove tension on the transmission belts to disconnect it?
Someone has some information/pictures on this?