Abstract: A vehicle brake having a vacuum suspended operating section. The assembly is arranged so that initial braking is accomplished by the operator admitting atmospheric pressure to the pressure side of a diaphragm that has a vacuum on its opposing side. The assembly is further arranged so that the wheel cylinder can be used to convert hydraulic pressure to air pressure. When the vehicle operator first applies a force to the brake pedal, a valve is actuated which allows vacuum and atmospheric pressure to impart sufficient force to provide initial braking. When greater brake pressures are required as indicated by increased brake pedal force exerted by the vehicle operator, a valve leading to atmospheric pressure closes, allowing the hydraulic pressure in the wheel cylinder to convert the trapped atmospheric pressure to air pressure.