There is a detent at the top of the lever slot, but the lever wont move into the detent. There is also a little angled piece of metal at the top of the lever slot that is held on with two screws. I don't understand the purpose of this little piece of metal. The 3 pt raises and lowers fine and stays in the up position as long as you hold it there. But a soon as you let go the vibration causes the lever, and the 3pt, to drop. In other words, it wont hold position without having your hand on the lever . Also I looked at diagrams of the lever slot housing on other sites and they show the slot as being on the side of the housing, while the slot on mine is on the top of the housing. Any ideas?