Mazda 323 1988 Workshop Manual page 762

11
POWER BRAKE UNIT
2. Start the engine. Depress the brake pedal when
the vacuum reaches 500
mm-Hg (19.7 in-Hg).
If the relationship between the pedal force and fluid
pressure is within the standard value range, the
.., ,
unit IS gooa,
Pedal force
Fluid pressure
196 N (20 kg, 44 lb) / 5,390 kPa (55 kg/cm', 782 psi) min
CHECKVALVE
Inspection
1, Disconnect the vacuum hose (with intenal check
valve) from the engine side.
2. Apply suction and pressure to the hose from the
engine side. Be sure air flows only toward the
engine.
Caution
If the check valve is bad, replace the hose and
valve.
Note
The check valve is pressed into the vacuum
hose, and there is an arrow on the hose sur-
face to indicate the installation direction.
11-20