Subaru Impreza 2003 Service Manual page 2591

• Lack of boosting action check
Turn off the engine, and set the vacuum gauge
reading at "0". Then, check the fluid pressure when
brake pedal is depressed. The pressure must be
greater than the standard value listed.
Brake pedal 147 N
force (15 kgf, 33 lb)
686 kPa
(7 kg/cm
14"
[588 kPa (6 kg/
Fluid
2
cm , 85 psi)]
pressure
15"
588 kPa
16"
(6 kg/cm
17"
[ ] : Model with ABS
• Boosting action check
Set the vacuum gauge reading at 66.7 kPa (500
mmHg, 19.69 inHg) by running engine. Then,
check the fluid pressure when brake pedal is de-
pressed. The pressure must be greater than the
standard value listed.
Brake pedal 147 N
force (15 kgf, 33 lb)
5,982 kPa
14" (61 kg/cm
psi)
5,296 kPa
15"
Fluid (54 kg/cm
pressure psi)
4,707 kPa
16"
(48 kg/cm
psi)
4,021 kPa
17"
(41 kg/cm
psi)
[ ] : Model with ABS
BRAKE BOOSTER
294 N
(30 kgf, 66 lb)
1,961 kPa
2 2
, 100 psi) (20 kg/cm , 284 psi)
[1,667 kPa (17 kg/
2
cm , 242 psi)]
1,471 kPa
2 2
, 85 psi) (15 kg/cm , 213 psi)
294 N
(30 kgf, 66 lb)
7,649 kPa
2
(78 kg/cm , 1,109
2
, 868 psi)
[8,434 kPa (86 kg/
2
cm , 1,223 psi)]
2
, 768
9,120 kPa
2
(93 kg/cm , 1,323
psi)
2
, 683
8,336 kPa
2 2
, 583 (85 kg/cm , 1,209
psi)
BR-59
BRAKE