Slack Adjusters can be adjusted manually or automatically.

• A. Always manually
• B. Always automatically
• C. Manually or automatically
• D. Not adjustable

Answer: (C)

Slack adjusters set the clearance between the brake shoes and the drum, and they come in two kinds: manual and automatic (self-adjusting). A manual slack adjuster is adjusted with a wrench during service to take up any slack. A self-adjusting (automatic) slack adjuster tightens itself as the brakes wear, so no manual intervention is usually needed for normal operation. Since a vehicle can be equipped with either type, it’s accurate to say slack adjusters can be adjusted manually or automatically. If automatic adjusters aren’t functioning, you may still need manual adjustment or servicing to restore proper clearance.