Ford 2003 Mustang Workshop Manual page 529

2. For bench priming, mount the brake master cylinder (2140) in a vise.
3. Install short brake tubes with the ends submerged in the brake master cylinder reservoir
(2K478), and fill the brake master cylinder reservoir with High Performance DOT 3 Brake Fluid
C6AZ-19542-AB or equivalent DOT 3 fluid meeting Ford specification ESA-M6C25-A.
4. Have an assistant pump the brake pedal (2455), or slowly depress the primary piston until clear
fluid flows from both brake tubes, without air bubbles.
5. If the brake master cylinder has been primed at the bench, install it in the vehicle. For additional
information, refer to
6. Remove the short brake tubes, and install the brake outlet tubes.
Section 206-06 .