5045D Toplink length

[beenthere]

I also run the cutter with rear wheel on the ground, but have chains instead of the flat bars that are loose when that tail wheel is on the ground. Flows with the ground that way, and the leading edge is adjusted with the 3ph. When 3ph is raised, then the rear wheel is lifted off the ground for transport.
Still waiting for a pic from the OP of how his rotary cutter is setup. Only have the closeup in the OP.

 

[beenthere]

Does this mean that when cutting you have the tail wheel running continuously on the ground with weight on it? I don't think it's supposed to work that way. The top link should be able to raise the rear of the mower to the proper height, and the tail wheel should only lightly touch on uneven terrain

Not a good way to run the cutter.. The cutter should float with the ground and cannot the way yours is apparently set up. Waiting for a pic to make any further suggestions.