116 Maintenance Brake Slack Adjusters and Cam DANGER Before checking the slack adjusters, set the parking brakes, place the transmission in neutral and block the wheels. Failure to do so can result in unexpected vehicle movement and can cause serious personal injury or death. To check the slack adjusters for proper throw, use a breaker bar to lever the slack adjuster out. Measure the distance of the travel. It should not exceed 1 to 1 1/4 in. (25 to 30 mm) for a 6 in. slack adjuster and should not exceed 3/4 to 1 in. (20 to 25 mm) for a 5 1/2 in. slack adjuster. Also make sure that the length of the slack adjuster is the same on an axle. Note: Travel is measured from the chamber face.
See 1 in illustration. W5001492 1 Chamber face