Checking should include inspecting and testing, based on
- DOT guidelines
- the description of normal operation.
ASE 1: III. Brakes: B. Air Brakes: Air Supply and Service System (P-1)
Process/Skill Questions:
- What are common reasons for the emergency (spring) brake control/modulator valve not working as designed?
- Why is the spring brake important?
- Why is it important to put the correct valve on the tractor and on the trailer?