Subaru Impreza 2003, Service Manual

Page: 2591 / 3610

BR-59
BRAKE
BRAKE BOOSTER
• 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.
[ ] : 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.
[ ] : Model with ABS
Brake pedal
force 147 N
(15 kgf, 33 lb)
294 N
(30 kgf, 66 lb)
Fluid
pressure
14
″
686 kPa
(7 kg/cm
2
, 100 psi)
[588 kPa (6 kg/
cm
2
, 85 psi)]
1,961 kPa
(20 kg/cm
2
, 284 psi)
[1,667 kPa (17 kg/
cm
2
, 242 psi)]
15
″
588 kPa
(6 kg/cm
2
, 85 psi)
1,471 kPa
(15 kg/cm
2
, 213 psi)
16
″
17
″
Brake pedal
force 147 N
(15 kgf, 33 lb)
294 N
(30 kgf, 66 lb)
Fluid
pressure
14
″
5,982 kPa
(61 kg/cm
2
, 868
psi)
7,649 kPa
(78 kg/cm
2
, 1,109
psi)
[8,434 kPa (86 kg/
cm
2
, 1,223 psi)]
15
″
5,296 kPa
(54 kg/cm
2
, 768
psi)
9,120 kPa
(93 kg/cm
2
, 1,323
psi)
16
″
4,707 kPa
(48 kg/cm
2
, 683
psi)
17
″
4,021 kPa
(41 kg/cm
2
, 583
psi)
8,336 kPa
(85 kg/cm
2
, 1,209
psi)