Having problems with your 2006 Ford F-250 Super Duty ?
Fixing air in brake line - 2006 Ford F-250 Super Duty
You need to bleed the lines. If you have not done this before you should watch some of the videos on YouTube. There are some pretty good ones out there for the beginner. In a nut shell though starting at the wheel farthest from the master cylinder locate the bleeder valve...it looks like a nipple with a hole in it. I would say that if the lines have not been bled in quite sometime that you will need replacement bleeder valves...they always break. There are several methods for doing this but I am going to roughly talk you through one of them. You will need one person in the driver seat and one at the bleeder screw. Have the person in the car pump the brakes until they are as hard as they can get them and hold them. At this point you will loosen the bleeder about a quarter to a half of a turn. You will see fluid shoot out the hole in the nipple. Now, while this is happening the person in the car will feel the brake pedal drop to the floor. While they are still in the pressing down phase you must close up the bleeder before they hit the floor. Do this a few times at each wheel until you have nothing but fluid coming out and no more air. I will gladly help you through the whole process as what I explained has a couple of gaps in it but will be cleared up by the video. Don't forget that between completing each wheel you must top off the brake fluid in the master cylinder. If you run out of fluid you will have to start all over again.
Repair Help & Product Troubleshooting for 2006 Ford F-250 Super Duty
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