1997 SUBARU LEGACY ABS

Model Sedan Wagon
Engine (cc) 2500
Driving system AWD
GT LSi GT LSi OUTBACK
Hill holder—————
Parking
brakeType Mechanical on rear brakes, drum in disc
Effective drum diameter
mm (in)170 (6.69)
Lining dimensions
(length x width x thickness)
mm (in)162.6 x 30.0 x 3.2 (6.40 x 1.181 x 0.126)
Clearance adjustment Manual adjustment
Master
cylinderType Tandem
Effective diameter
mm (in)26.99 (1-1/16)
Reservoir type Sealed type
Brake fluid reservoir capacity
cm
3(cu in)190 (11.59)
Brake
boosterType Vacuum suspended
Effective diameter
mm (in)205 + 230 (8.07 + 9.06)
Proportioning
valveSplit point
kPa (kg/cm
2, psi)3,678 (37.5, 533)
Reducing ratio 0.3
Brake line Dual circuit system
ABSSTD
8
4-4SPECIFICATIONS AND SERVICE DATA
1. Brakes

B: SERVICE DATA
ITEM STANDARD SERVICE LIMIT
Front brakePad thickness
(including back metal)17 mm (0.67 in) 7.5 mm (0.295 in)
Disc thickness 24 mm (0.94 in) 22 mm (0.87 in)
Disc runout—0.075 mm (0.0030 in)
Rear brake (Disc type)Pad thickness
(including back metal)15 mm (0.59 in) 6.5 mm (0.256 in)
Disc thickness 10 mm (0.39 in) 8.5 mm (0.335 in)
Disc runout—0.10 mm (0.0039 in)
Rear brake (Drum type)Inside diameter 228.6 mm (9 in) 230.6 mm (9.08 in)
Lining thickness 4.1 mm (0.161 in) 1.5 mm (0.059 in)
Rear brake (Disc type
parking)Inside diameter 170 mm (6.69 in) 171 mm (6.73 in)
Lining thickness 3.2 mm (0.126 in) 1.5 mm (0.059 in)
Parking brake Lever stroke 7 to 8 notches/196N (20 kg, 44 lb)
Without ABS and TCS With ABS and TCS
Brake boosterBrake pedal force Fluid pressure
Brake fluid pressure
without engine running147 N
(15 kg, 33 lb)785 kPa
(8 kg/cm
2, 114 psi)588 kPa
(6 kg/cm2, 85 psi)
294 N
(30kg, 66 lb)2,158 kPa
(22 kg/cm
2, 313 psi)1,667 kPa
(17 kg/cm2, 242 psi)
Brake fluid pressure with
engine running and
vacuum at 66.7 kPa (500
mmHg, 19.69 inHg)147 N
(15 kg, 33 lb)5,492 kPa
(56 kg/cm
2, 796 psi)5,394 kPa
(55 kg/cm2, 782 psi)
294 N
(30kg, 66 lb)8,434 kPa
(86 kg/cm
2, 1,223 psi)10,003 kPa
(102 kg/cm2, 1,450 psi)
C: RECOMMENDED BRAKE FLUID
FMVSS No. 116, fresh DOT3 or 4 brake fluid
CAUTION:

Avoid mixing brake fluid of different brands to pre-
vent the fluid performance from degrading.

When brake fluid is supplemented, be careful not to
allow any dust into the reservoir.

Use fresh DOT3 or 4 brake fluid when replacing or
refilling the fluid.
D: BRAKE FLUID LEVEL INDICATOR
Reserve tank with level indicator:
Residual fluid quantity at light ON
Approx. 80 cm
3(4.88 cu in)
Tank capacity
190 cm
3(11.59 cu in)
9
4-4SPECIFICATIONS AND SERVICE DATA
1. Brakes

4. Master Cylinder
1. WITHOUT TCS
B4M0067A
1Cap

2Reserve tank

3Seal

4Cylinder body

5Secondary piston

6Primary piston
7C-ring

8Level indicator ASSY

9Supply valve stopper
(With ABS)

10Gasket (With ABS)

11Reservoir stopper bolt
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 2.2±0.7
(0.225±0.075, 1.6±0.5)
T2: 14±4 (1.4±0.4, 10.1±2.9)
2. WITH TCS
B4M0613A
1Cylinder pin

2Seal

3Filter

4Cylinder body
5Spring

6Secondary piston

7Primary piston

8Stop washer A
9Bush

10Stop washer B

11C-ring
14
4-4COMPONENT PARTS
4. Master Cylinder

5. Brake Booster
1. MODELS WITH ABS AND TCS
G4M0355
1Push rod

2Return spring

3Reaction disc

4Key
5Filter

6Silencer

7Operating rod

8Poppet valve
9Valve body

10Plunger valve

11Diaphragm plate

12Valve return spring
2. MODELS WITHOUT ABS AND TCS
G4M0356
1Push rod

2Return spring

3Diaphragm plate

4Reaction disc
5Plunger valve

6Key

7Poppet valve

8Valve return spring
9Operating rod

10Silencer

11Filter

12Valve body
16
4-4COMPONENT PARTS
5. Brake Booster

6. ABS System (Except ABS 5.3i Type)
1. SENSOR AND CONTROL MODULE (EXCEPT ABS
5.3 TYPE)
B4M0068A
1G sensor (AWD MT only)

2Rear ABS sensor RH

3ABS spacer

4Rear ABS sensor LH

5Bracket
6ABS control module

7Front ABS sensor LH

8Front ABS sensor RH
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 5.9±1.5 (0.60±0.15, 4.3±1.1)
T2: 7.4±2.0 (0.75±0.2, 5.4±1.4)
T3: 32±10 (3.3±1.0, 24±7)
17
4-4COMPONENT PARTS
6. ABS System (Except ABS 5.3i Type)

2. HYDRAULIC CONTROL UNIT (EXCEPT ABS 5.3
TYPE)
B4M0069A
1Connector

2Cap

3Motor relay

4Valve relay

5Hydraulic control unit

6Front-RH outlet

7Rear-LH outlet

8Rear-RH outlet
9Front-LH outlet

10Primary inlet

11Secondary inlet

12Bracket
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 1.2±0.2
(0.125±0.025, 0.9±0.2)
T2: 18±5 (1.8±0.5, 13.0±3.6)
T3: 29±7 (3.0±0.7, 21.7±5.1)
T4: 32±10 (3.3±1.0, 24±7)
18
4-4COMPONENT PARTS
6. ABS System (Except ABS 5.3i Type)

3. SENSOR AND CONTROL MODULE (ABS 5.3 TYPE)
B4M1044A
1G sensor (AWD only)

2Rear ABS sensor RH

3ABS spacer

4Rear ABS sensor LH
5Bracket

6ABS control module

7Front ABS sensor LH

8Front ABS sensor RH
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 7.4±2.0 (0.75±0.2, 5.4±1.4)
T2: 32±10 (3.3±1.0, 24±7)
19
4-4COMPONENT PARTS
6. ABS System (Except ABS 5.3i Type)

4. HYDRAULIC CONTROL UNIT (ABS 5.3 TYPE)
B4M0994A
1Hydraulic control unit

2Damper

3Stud bolt

4Rear-RH outlet

5Rear-LH outlet

6Secondary inlet

7Primary inlet
8Front-LH outlet

9Front-RH outlet

10Cable clip

11Bracket

12Relay box

13Motor relay

14Valve relay
15Cap

16Connector bracket
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 18±5 (1.8±0.5, 13.0±3.6)
T2: 29±7 (3.0±0.7, 21.7±5.1)
T3: 32±10 (3.3±1.0, 24±7)
20
4-4COMPONENT PARTS
6. ABS System (Except ABS 5.3i Type)