Happijacs, what will happen if.........
When reading about the operation of my happijac electric camper jacks, it stated numerous places, "Never raise the back of the camper higher than the front". Why? Is the location of the front jacks...
Forum Discussion
JoeChiOhki wrote:
The logic I can see and its not just unique to Happijacks is the rear jacks in most cases have the tubes anchored the full length down the wall of the camper, allowing the camper to restrain the side to side movement of the jack tube. The fronts are only anchored on at a very small section of the tube turning them into giant fulcrums.
When you tip the nose higher the rear jacks are restrained by the camper itself and don't begin to flex to the side as the weight application changes.
When you go the opposite direction, the front legs have nothing to prevent them from flexing or twisting toward the rear, apply enough downward dog pressure and the jacks will either buckle or the anchor points will fail, because you've been applying a twisting forcing to that limited anchor area with a fulcrum. (Think of how using a cheater bar on a socket wrench amplifies the force at the nut or bolt, you're doing the same with your front jacks).
Exactly! Good explanation Joe!
Jim
