Final answer:
Slack adjusters on S-cam brakes need adjustment if they move more than two inches when the push rod attaches.
Step-by-step explanation:
Slack adjusters on S-cam brakes need adjustment if they move more than two inches when the push rod attaches.
The correct answer is: True.
When the push rod attaches to the slack adjuster, it should move no more than two inches. If it moves more than two inches, it indicates that the slack adjuster needs adjustment. The purpose of the slack adjuster is to maintain the correct clearance between the brake shoes and the brake drum, ensuring optimal brake performance.