Which of the following is NOT a method of bleeding brakes?

The centrifugal method is not a recognized technique for bleeding brakes. The primary methods for bleeding brakes include vacuum, gravity, and pressure methods, all of which are aimed at removing air from the brake lines to ensure proper brake function.

The vacuum method involves using a vacuum pump to draw brake fluid through the lines and out of the bleed screw, effectively removing air bubbles. The gravity method relies on the natural flow of brake fluid under the influence of gravity to push out any air trapped in the system, typically by leaving the reservoir cap off and allowing fluid to flow down until all air is expelled. The pressure method uses a device to create pressure in the brake fluid reservoir, forcing the fluid—and any trapped air—out of the bleed screws.

In contrast, the centrifugal method is not applicable to brake systems as it does not utilize the principles needed for effective air removal from brake fluid lines, making it not a method for bleeding brakes.