My Voyager actually weighs about 70 lbs, but I don't have any problem using the pantographs. I can move it on the rails with a touch of my little finger. Check to make sure you have raised your quilt as you have rolled it. You should have a finger's width between the quilt and the bed of the machine. Your little wheels that run in the track could also be loose and causing dragging problems. Also, thread and stuff can get in the wheels from falling on the track and may have to be cleaned. Check the wheels on the rails as well and be sure they are not loose or bent. Clean rails and tracks with denatured alcohol or if there is a lot of black stuff, use Goo-Be-Gone, then the alcohol.
If none of this helps, contact a dealer. You shouldn't be having this much trouble moving the machine.