I dont know for sure, but the one i recieved withe the casita
say 3 turns of the handle to release tension. the adjusting nut is pre set for 1300 pounds.
if this does not give enought sway protection tighten nut 1/4 turn and try again.
and to take out the bar and clean with steel wool after fisrt 1000 miles then every 10000 miles .
never lubricate or paint
the slide bar.
notes say not to use bar on wet , icy or oily roads ( guess that leaves 75% of the country out)
i tuun the handle till it is hard to turn and the hadle is not in a position to spear any body parts
hope this help