is done via the bleeding fittings back on the bar mounted on the engine. If you have your owners manual and installation booklet there is a good explanation in it. Otherwise, a simple and quicker way is, with the engine pointing straight forward, open the fill cap on the helm, fill with the manufacturer's suggested fluid to where you can replace cap, and replace it, and tighten it. Turn the wheel to the right and left to the full extent each way. Open cap, and refill, and replace cap. Repeat turning the wheel in both directions. Continue to repeat the process until the system works properly. A seal is compromised in your system and will eventually have to be replaced. You can buy seal replacement kits or most qualified marine mechanics are practiced at dealing with this issue. I would imagine your manufacturer has information online, as well. The formal manner of bleeding the system is similar, and doesn't take much more time, but requires a couple of tools, etc. to complete. WARNING: do not turn the wheel with the cap off or loose!