Turn the tension knob so that there is not enough tension to keep the cushion up when you pull it with your hands.
Begin with the cushion resting on the frame. Grasp the cushion on the sides and pull up. It should collapse freely. If you feel a degree of resistance when lifting then the shoulder bolts which the cushion rides up and down on are slightly out of alignment.
Refer to the drawing. There is a glide bolt on each side of the cushion which is secured to the underside of the cushion with two hex head bolts. Use a 7/16" wrench to only loosen the two hex bolts.
Grasp the cushion to lift and let it collapse several times. This properly aligns the glide bolts to the frame again.
With the cushion collapsed, stabilize it with your hand on top while you retighten the two hex head bolts on each side of the cushion.
