Inspection should include
- operating the treadle valve and checking the brake chambers for even application
- checking the hoses from the brake relay valve to the brake chambers for blockage or leakage.
ASE 1: III. Brakes: B. Air Brakes: Air Supply and Service Systems (P-1)
Process/Skill Questions:
- How does the relay valve operate?
- What types of evidence indicate a defective relay valve?
- How can the brakes operate if the relay valve is not functioning properly?