Just bought a used '11 Palomino Thoroughbred late last week. My manual tongue jack upon disconnecting earlier this week after returning home from a camping trip broke. I have to max it out lift wise at the 14 inches of lift with 7 inches of wood under it in order to remove it from my tow vehicle with the equalizer hitch system. When standing on the bumper to release the hitch ball from the trailer the jack collapsed. I believe the trailer weighs 5474 empty. What size/rating of a tongue jack do I replace it with?