Make sure you have the top link connected into the right hole at the tractor end. Put both draft and position control levers all the way forward. Pull the draft control lever back to the height you want the implement to maintain. As your implement pulls down into the ground and makes it harder to pull the 3 pt will raise to the height you've adjusted. You might have to also adjust the 3 pt speed lowering knob (below the seat on my Kioti) to slow it down.