Slack adjuster inspection involves identifying which aspect?

• A. Type and inspection of slack adjusters
• B. Color of air hoses
• C. Wheel speed sensor
• D. Brake light switch

Answer: (A)

Slack adjuster inspection tests your ability to identify the type and condition of slack adjusters in the braking system. The slack adjuster is the lever that translates the air brake chamber’s pushrod movement into the brake shoe movement, keeping the correct clearance when the brakes are released. In this inspection you determine whether the system uses manual or automatic slack adjusters and verify they are in good condition and properly adjustable. Look for wear, damage, missing parts, bent components, or air leaks, and ensure the adjustment is within acceptable limits for the setup. Automatic slack adjusters should operate freely and not be seized; manual slack adjusters require correct adjustment via the adjusting nut. The other topics—color of air hoses, wheel speed sensor, or brake light switch—do not pertain to the slack adjuster’s type or condition.