

Animation effectively illustrates this process, showing how the rotation of the drum causes it to spin while the shoes are forced outward. This outward movement occurs due to the expansion of the brake shoes, driven by the movement of the pistons. The friction generated between the shoes and the drum produces the braking force needed to slow down or stop the vehicle.
A drum brake self-adjuster repair kit typically includes all the necessary components to restore the functionality of the self-adjuster mechanism. The kit generally consists of an adjusting screw, spring, lever, and sometimes additional hardware such as clips and cotter pins. These parts work together to maintain the correct position of the brake shoes, ensuring even pressure across the drum and preventing excessive wear.