Final answer:
Slack adjusters are adjusting nuts on the backside of the brake drum used for adjusting the brakes in a vehicle and maintaining proper brake shoe-to-drum clearance.
Step-by-step explanation:
The slack adjusters are adjusting nuts on the backside of the brake drum used for adjusting the brakes in a vehicle. They are responsible for maintaining proper brake shoe-to-drum clearance, ensuring effective braking performance.
When the brake pedal is pressed, hydraulic pressure is generated, causing the slack adjuster to rotate and move the brake shoes closer to the drum, resulting in braking action. This adjustment compensates for brake shoe wear and ensures optimal braking performance over time.
It is important to regularly inspect and adjust the slack adjusters to prevent brake issues, such as uneven braking or excessive wear of the brake shoe lining.