In a drum brake system, the rotational action of the brake shoes activates the self-adjuster linkage when the brakes are applied and the vehicle is In reverse Suddenly stopped Moving forward Braking in either direction

## Step 1<br />The problem is about the operation of a drum brake system in a vehicle. The drum brake system is a type of braking system that uses brake shoes to create friction with the drum, which is a part of the wheel. The brake shoes are activated when the brakes are applied.<br /><br />## Step 2<br />The self-adjuster linkage in a drum brake system is activated when the brakes are applied and the vehicle is moving forward. This is because the self-adjuster linkage is designed to adjust the brake shoes to maintain consistent contact with the drum as the vehicle moves forward.<br /><br />## Step 3<br />The self-adjuster linkage does not activate when the vehicle is in reverse, suddenly stopped, or braking in either direction. This is because the self-adjuster linkage is specifically designed to work with the forward motion of the vehicle.