Air Brake Manual


This content makes me feel
Happy
Curious
Informed
Inspired
Unsure
Bored
Frustrated
Angry
Translate
Google Translate is a third-party tool, and is not owned or administered by SGI. SGI is not responsible for any errors or omissions as a result of the translation. In case of a difference in interpretation between the translated version and the laws and regulations governing Saskatchewan drivers and vehicles, the laws and regulations prevail.

Service tests

  • Apply the brakes and check that the slack adjusters rotate freely without binding.
  • Release the brakes and check that the slack adjusters return to their released position without binding.
  • With brakes released, check that the angle formed by the slack adjuster arm and push rod is greater than 90 degrees (Fig. 52). All slack adjusters should be adjusted to this same angle.
    Note: The practical test will include proper adjustment of a manual slack adjuster and a verbal explanation of the proper procedure for adjusting an automatic slack adjuster.
  • With brakes applied (20 psi [138 kPa]), check that the new angle is no less than 90 degrees and that all slack adjusters have the same amount of travel.
Trailer spring-brake valve
Figure 52. Slack adjuster and push rod angle
 
Automatic slack adjuster
Figure 53. Automatic slack adjuster

Disclaimer

Rev: 2018