Sometimes self leveling forks near the minimum capacities of 20% of the maximum load need help in getting the internal springs to compress and the trolley to move up the internal ramping to meet the center of gravity. A solution is to put your foot on the back horizontal bar, and pull back near the top of the mast. You’ll want to pay attention to ensure your hands will not be struck by shifting items. You can see it can be done with no loading. If you do this with a load on that is close, it often locks in place. Secure the load with the chain, pin off the trolley if the option is there, and send it.