Technician A says, with the brakes off, the pressure in the front chamber helps hold the diaphragm in the released position. Technician B says air pressure in the rear chamber counteracts the opposing vacuum to hold the diaphragm in the released position. Who is correct?

Question

Quizplus · Accepted Answer

In a typical brake system, the diaphragm is held in the released position by a spring, not by air pressure in either chamber.

Technician a Says, with the Brakes Off, the Pressure in the Front