Title: Test the one-way check valves.
Course: Diesel Equipment Technology I (20107-I) > Section: Preventive Maintenance and Inspection: Servicing the Air Brakes

Testing should include inspecting and assessing, based on

- a check of the air pressure in the brake system
- manufacturer guidelines
- the description of normal operation.

Process/Skill Questions:

- What may happen when the one-way or double-check valves do not operate correctly?
- Where are the one-way check vales located?
- How do the one-way check valves work?
- Why is it important to protect and store large quantities of air in any air brake vehicle?