When you installed the master cylinder, did you bleed it before installing it? This process is called bench bleeding and it gets the air bubbles out of the master cylinder itself. Without doing this, air bubbles will get into the system and screw with your pedal pressure. Here is a guide on how to do that:
https://www.wikihow.com/Bleed-a-Master-Cylinder
Also, did you make sure that you were using a brake fluid that is compatible with your truck? Using the wrong fluid can cause the brakes to get stuck like that.
Do you know which wheel/wheels got stuck? An easy way to know that would be to drive it and then feel the temperature of the wheels all around the truck. The hot one has sticking brakes.
And what was your bleeding process? Did you start from the right rear tire, then the left rear, then the right front, and then the left front wheel? Here is a guide to the proper brake bleeding process:
https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system
Finally, thirty year old brake fluid with 200,000 or more miles of being heated, and cooled, over and over, is dirty and not nearly as functional as it should be. You would be wise to change that fluid.
Dec 21, 2017 at 7:49 PM
