If the door slams shut or closes too slowly, adjust the pneumatic cylinder: To slow the closing, turn the screw on the end of the pneumatic cylinder clockwise. To speed up the closing, turn the screw counterclockwise. Click to see full answer. Beside this, how do you adjust the tension on a storm door? To Adjust Tension: Locate adjustment screw on door-end of closer barrel. Using a flathead screwdriver, tighten screw (turn clockwise) to raise tension and slow speed of door closing action. Loosen screw (turn counter-clockwise) to lower tension and raise speed of door closing.Beside above, how do you adjust a hydraulic door closer? Start with no more than 1/8 of a turn. Turn the adjustment screw clockwise to slow the door closer down, counter-clockwise to speed it up, then get down off the ladder and observe the effect. Open the door and watch it close. If it closes right the first time, check it 10 more times. Secondly, how do you adjust a storm door? Stick a shim between the door and the frame (as in Photo 1), tighten the existing screws and drill new screw holes through the frame. Press lightly as you drill the metal; you don’t want to drill into the wood molding with the 3/16-in. bit.How do you adjust a storm door that won’t close? Make Screen Door Closer Adjustment Most are designed with an adjustment screw at the end of the cylinder that points away from the hinge side. Using your screwdriver, turn the screw counterclockwise to decrease pressure inside the mechanism. This allows the door to close faster.