I have just purchased a new Reese 5th-wheel hitch on my 2021 Ford F350 with puck system. I have not yet tried to hitch the trailer because I don't want to screw up.
With the arm pulled out, the jaw remains in the closed position. (Hitches that I have used in the past all had the jaw in open position.) When the kingpin comes in contact with the jaw while backing slowly, I hope that pressure of the kingpin will open the jaw.
My real question is about unhitching. The instructions say to pull the arm out to the click position and then rotate it toward the truck. By playing with the hitch, I see that rotation of the arm opens the jaw. OK, so far. But the arm does not want to remain in the rotated position, so the jaw closes again.
Even though the jaw is closed, the instructions say that the trailer is now unhitched. Will the jaws open to release the kingpin when I drive forward? That's what I to know before I try hitching up.