Air Brake Coach
Brake adjustmentQuestion 68 of 116

After you tighten a manual slack adjuster, how far should you back it off?

  1. A full turn
  2. About a third of a turn
  3. Three full turns
  4. Do not back it off
Show answer

Correct answer: About a third of a turn

A third of a turn is a general guide. The exact amount varies.

Source: Air Brake Manual: A Guide for Instructors (Government of Alberta, Alberta Transportation, March/April 2012), Module 8: Foundation brakes, page 81

Practice brake adjustment

Questions last reviewed: 18 October 2026