When checking slack adjuster how much play is acceptable?

When checking a slack adjuster, an acceptable amount of play is typically around 1 to 2 inches at the adjuster's arm. However, if the slack adjuster moves more than this range, it may indicate wear or a need for adjustment. It's essential to also check for proper functioning and alignment, as excessive play can lead to brake system inefficiency and safety concerns. Always refer to the manufacturer's guidelines for specific tolerances.