Air Brake Manual


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Section summary

  1. What is the basic principle of the dual-circuit system?
  2. What valve is used to protect the primary circuit from the secondary circuit?
  3. In a dual-circuit system, will the vehicle continue to have braking ability if one circuit fails?
  4. What is meant by “compounding” the brakes?
  5. Why are spring brakes a reliable type of parking brake?
  6. How are parking brakes held in the released position?
  7. What is the reason for releasing the parking brakes before making a full brake application test?
  8. What is the danger of disassembling a parking-brake unit?
  9. Name two functions of the spring brakes in a dual-circuit system.
  10. Describe the functions of the spring-brake modulator valve.
  11. What is blended air?

Disclaimer

Rev: 2018