Make a trailer's hidraulic lift

Hello, recently I made a moving trailer, and today I tried to make the hidraulic lifts to lift it up to attach it to the truck, and I tried doing it with a prismatic constraint, but apparently it’s too weak that it can’t lift the whole trailer. I wanted to know if there is a different way to make it possible.

NOTE: I want the trailer to lift on it’s own wheels, like if the pivot was the wheels.