I do not have much experience with the lighter fifth wheels, however semi truck fifth wheels require some grease between the trailer and wheel. Was it greased? Maybe those people out there with fifth wheel travel trailers can chime in on this??
Keep the Shiny Side Up!;)
2011 F150 Supercrew, 4X4 3.5 Ecoboost, 145" wheelbase, 3.73 gears, Max trailer Tow package
2014 Puma 30DBSS
Equali-I-Zer WD Hitch
3 kids and 1 DW