I have a LCI 3,500 lb. I know my trailer tongue weight is will under 1,000 lb. But when I hook and unhook to my truck I leave the hitch ball connected and use the jack to raise the back of my truck, to take the weight off the round bar's on the hitch. Makes it easy to slide the round bar on and off without using the hand tool. That's how the Dealer showed me to hook up at the walk through.
My truck weight is 7,600 lb. plus what is in it. I'm rising maybe half that plus the tongue weight of the trailer. I'll be lucky to get three seasons out of my jack.
On a side note, I'm not lifting the trucks rear wheels off the ground, so it can't be half the trucks and I always fill my rear air bags in the truck when the ball is connected to help raise the rear of my truck.
Does all this make any scents to anyone but me?