Here are a few pictures of repair stands that I have designed for doing a TA job. Your repair time may vary, depending how the tractor is equiped and what you have available for repair equipment. 25 hours is a good starting point.
These pictures are from a 986 but a 806 is very similiar. The last picture is out of placed should be moved up two frames. I have many more picture just let me know if you have any questions. E-mail is open