Hi Guys,
the Brother MFC 8480 and many other similar models have a black bar connected to the lower fuser. it moves left and right and adds or reduces pressure on the fuser exit roller idlers.

can anyone tell me, what is the normal position of that when using plain 20 pound paper??

they seem to work in either position, and its not the levers some have to reduce the pressure of the fuser pressure roller against the upper fuser roller.

thank you very much for any input. Jim