Technician A says a ir fills the rear chamber when brake application opens the air valve and closes the vacuum valve, and the front chamber is kept in vacuum . Technician B says w hen the brakes are held at midpoint, both valves are closed to trap vacuum and atmospheric pressure and keep the diaphragm in a balanced position . Who is correct?

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. Technician A describes the process of how air fills the rear chamber to apply the brakes, while Technician B explains the mechanism for holding the brakes at a midpoint by trapping vacuum and atmospheric pressure, which keeps the diaphragm balanced.

Technician a Says a Ir Fills the Rear Chamber When