I have been trying to get all the air out of my hydraulic steering. I have bled several quarts through the system. But there always seemed to be play in the system. The bleeder screws have Orings, so they don't leak from the threads when they are loose. So, I took a piece of tubing and connected both bleed screws together. Purged as much of the air out of the tube as I could. Then opened both bleed screws at the same time. Filled the helm with the fill kit. Then continuously turned the wheel in one direction. Every once in a while, I could see bubbles go through the tube. I continued turning at least 10 rotations after bubbles stopped coming out of the helm. Then I started turning the other direction and more bubbles went through the tube. I kept turning until the bubbles came out the helm. Plus 10 extra rotations. I repeated this process twice more until no more bubbles came out of anywhere. My steering is now finally tight.