Lancer Shelby L4-135 2.2L SOHC Turbo (1989)
Fig. 3 Bendix Tandem Diaphragm Power Brake
These units are of the vacuum suspended type. Some units are of the single diaphragm type, while others are of the tandem diaphragm type. Both single
piston and double piston or split system type master cylinders are used.
The vacuum suspended diaphragm type units utilize engine manifold vacuum and atmospheric pressure for its power. It consists of three basic elements
combined into a single power unit. The three basic elements of the single diaphragm type are:
1.
A vacuum power section which includes a front and rear shell, a power diaphragm, a return spring and a push rod.
2.
A control valve, built integral with the power diaphragm and connected through a valve rod to the brake pedal, controls the degree of brake
application or release in accordance with the pressure applied to the brake pedal.
3.
A hydraulic master cylinder, attached to the vacuum power section which contains all the elements of the conventional brake master cylinder
except for the pushrod, supplies fluid under pressure to the wheel brakes in proportion to the pressure applied to the brake pedal.
