Had to talk to my dealer this morning about something unrelated to this post, so I figured I would ask this question.
Bottom line for a B2650 with position control, it does not matter where the 3-point position is (I.e. Up, down, etc) when using the backhoe. The intent of the manual notes is not to activate your 3-pt hitch, remotes, etc when operating your backhoe. That being said, what I suggested is correct.....put your 3-pt in whatever position you like and then lock down the speed knob under the operators seat. Doing so will eliminate any accidental movement of the 3-pt when using the backhoe.
Thanks for your help on this. So by locking down the speed knob under the operators seat if the 3 pt. hitch position lever is accidentally moved, it will not effect the back pressure of the hydraulic oil flow from the backhoe ??