brake fluid SUBARU LEGACY 1996 Service User Guide

9. BREAKAGE OF HOSES
Pressure hose burstExcessive holding time of relief
statusInstruct customers.
Malfunction of relief valveReplace oil pump.
Poor cold characteristic of fluidReplace fluid.
Forced out return hosePoor connectionCorrect.
Poor holding of clipRetighten.
Poor cold characteristic of fluidReplace fluid.
Fluid bleeding out of hose slightlyWrong layout, tensionedReplace hose.
Excessive play of engine due to
deterioration of engine mounting
rubberReplace defective parts.
Improper stop position of pitching
stopperReplace defective parts.
*11
Crack on hose
Excessive holding time of relief
statusReplace.
Instruct customer.
Excessive tightening torque for
return hose clipReplace.
Power steering fluid, brake fluid,
engine oil, electrolyte adhere on
the hose surfaceReplace.
Pay attention on service work.
Too many times use in extremely
cold weatherReplace.
Instruct customers.
*11 Although surface layer materials of rubber hoses have excellent weathering resistance, heat resistance and resistance for
low temperature brittleness, they are likely to be damaged chemically by brake fluid, battery electrolyte, engine oil and
automatic transmission fluid and their service lives are to be very shortened. It is very important to keep the hoses free
from before mentioned fluids and to wipe out immediately when the hoses are adhered with the fluids.
Since resistances for heat or low temperature brittleness are gradually declining according to time accumulation of hot or
cold conditions for the hoses and their service lives are shortening accordingly, it is necessary to perform careful inspec-
tion frequently when the vehicle is used in hot weather areas, cold weather area and/or a driving condition in which many
steering operations are required in short time. Particularly continuous work of relief valve over 5 seconds causes to reduce
service lives of the hoses, the oil pump, the fluid, etc. due to over heat.
So, avoid to keep this kind of condition when servicing as well as driving.
99
4-3DIAGNOSTICS
1. Power Steering

Model 4 Door Sedan Wagon
Engine (cc) 2200 2200
Driving system FWD AWD FWD AWD
L+ L+ LS L+ L+ OUTBACK LS
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)2,942 (30.0, 427)
Reducing ratio 0.3
Brake line Dual circuit system
ABS—OP STD—OP OP STD
ABS/TCS OP—OP—

: Equipped on manual transmission vehicle. (Except TCS model)
3
4-4SPECIFICATIONS AND SERVICE DATA
1. Brakes

Model Sedan Wagon
Engine (cc) 2200
Driving system FWD AWD FWD AWD
L+ L+ L+ POST BRIGHTON L+ OUTBACK
Hill holder

—— —
—
Parking
brakeType Mechanical on rear brakes, drum in disc
Effective drum diameter
mm (in)228.6 (9)
Lining dimensions
(length x width x
thickness
mm (in)218.8 x 35.0 x 4.1 (8.61 x 1.378 x 0.161)
Clearance adjustment Automatic adjustment
Master
cylinderType Tandem
Effective diameter
mm (in)23.81 (15/16)
Reservoir type Sealed type
Brake fluid reservoir
capacity
cm
3(cu in)190 (11.59)
Brake
boosterType Vacuum suspended
Effective diameter
mm (in)230 (9.06)
Proportioning
valveSplit point
kPa (kg/cm
2, psi)3,678 (37.5, 533)
Reducing ratio 0.3
Brake line Dual circuit system

: Equipped on manual transmission vehicle.
5
4-4SPECIFICATIONS AND SERVICE DATA
1. Brakes

Model Sedan Wagon
Engine (cc) 2500 2200 2500
Driving system AWD
GT LSi GT LSi OUTBACK* OUTBACK*
Hill holder————STD—
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)
Propor-
tioning
valveSplit point
kPa (kg/cm
2, psi)3,678 (37.5, 533)
Reducing ratio 0.3
Brake line Dual circuit system
ABSSTD
*: Step roof model
7
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)
8
4-4SPECIFICATIONS AND SERVICE DATA
1. Brakes

B4M0770A
4) Gradually supply compressed air via caliper body brake
hose to force piston out.
CAUTION:
Place a wooden block as shown in Figure to prevent
damage to piston.
5) Remove piston seal from caliper body cylinder.
6) Remove lock pin sleeve and boot from caliper body.
7) Remove guide pin boot.
D: INSPECTION
1) Repair or replace faulty parts.
2) Check caliper body and piston for uneven wear, dam-
age or rust.
3) Check rubber parts for damage or deterioration.
E: ASSEMBLY
1. EXCEPT 2500 cc AND OUTBACK (STEP ROOF)
MODEL
1) Clean caliper body interior using brake fluid.
2) Apply a coat of brake fluid to piston seal and fit piston
seal in groove on caliper body.
3) Apply a coat of brake fluid to the entire inner surface of
cylinder and outer surface of piston.
4) Apply a coat of specified grease to boot and fit in groove
on ends of cylinder and install piston boot onto cylinder.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
G4M0372
5) Insert piston into cylinder.
CAUTION:
Do not force piston into cylinder.
28
4-4SERVICE PROCEDURE
1. Front Disc Brake

B4M0072A
6) Position boot in grooves on cylinder and piston.
B4M0073A
7) Apply a coat of specified grease to guide pin, outer
surface, sleeve outer surface, cylinder inner surface, and
boot grooves.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
8) Install guide pin boots on caliper body.
9) Install lock pin boots on caliper body and insert lock pin
sleeve into place.
B4M0074A
2. 2500 cc AND OUTBACK (STEP ROOF) MODEL
1) Clean caliper body interior using brake fluid.
2) Apply a coat of brake fluid to piston seal and fit piston
seal in groove on caliper body.
3) Apply a coat of brake fluid to the entire inner surface of
cylinder and outer surface of piston.
B4M0771A
4) Insert piston into cylinder.
CAUTION:
Do not force piston into cylinder.
29
4-4SERVICE PROCEDURE
1. Front Disc Brake

G4M0382
2. DISC ROTOR
1) Install disc rotor by tightening the five wheel nuts.
2) Set a dial gauge on the disc rotor. Turn disc rotor to
check runout.
NOTE:
Make sure that dial gauge is set 5 mm (0.20 in) inward of
rotor outer perimeter.
Disc rotor runout limit:
0.1 mm (0.004 in)
G4M0383
3) Measure disc rotor thickness.
NOTE:
Make sure that micrometer is set 5 mm (0.20 in) inward of
rotor outer perimeter.
Disc rotor thickness: A
Standard value 10 mm (0.39 in)
Service limit 8.5 mm (0.335 in)
NOTE:
When removing disc rotor, refer to instructions under Park-
ing Brake 4-4 [W4A0].
G4M0384
B: REMOVAL
1) Lift-up vehicle and remove wheels.
2) Disconnect brake hose from caliper body assembly.
CAUTION:
Do not allow brake fluid to come in contact with vehicle
body; wipe off completely if spilled.
3) Remove lock pin.
4) Raise caliper body and move it toward vehicle center to
separate it from support.
5) Remove support from back plate.
NOTE:
Remove support only when replacing it or the rotor. It need
not be removed when servicing caliper body assembly.
6) Clean mud and foreign particles from caliper body
assembly and support.
CAUTION:
Be careful not to allow foreign particles to enter inlet
(at brake hose connector).
34
4-4SERVICE PROCEDURE
2. Rear Disc Brake

E: ASSEMBLY
1) Clean caliper body interior using brake fluid.
2) Apply a coat of brake fluid to piston seal and fit piston
seal in groove on caliper body.
3) Apply a coat of brake fluid to the entire inner surface of
cylinder and outer surface of piston.
4) Insert piston into cylinder.
CAUTION:
Do not force piston into cylinder.
5) Apply a coat of specified grease to boot and fit in groove
on ends of cylinder and piston.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
G4M0373
6) Install the piston boot to the caliper body, and attach
boot ring.
G4M0390
7) Apply a coat of specified grease to guide pin, outer
surface, sleeve outer surface, cylinder inner surface, and
boot grooves.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
8) Install guide pin boot on caliper body.
9) Install lock pin boot on caliper body and insert lock pin
sleeve into place.
G4M0375
36
4-4SERVICE PROCEDURE
2. Rear Disc Brake

D: ASSEMBLY
1. WHEEL CYLINDER
Clean all parts in brake fluid. Check and replace faulty
parts.

Cup and boot for damage or fatigue

Cylinder, piston and spring or damage or rust formation
1) Assembly is the reverse order of disassembly.
G4M0404
(1) When installing the cup, use ST, apply brake fluid
to the frictional surface for smooth installation and pay
attention to cup direction.
(2) STs are available in different sizes.
CAUTION:

When replacing the repair kit, make sure that the
sizes of cylinder and cup are the same as those which
were replaced.

Use only the tool of the correct size.
ST: ADAPTER
Applicable size Part No.
17.46 mm (11/16 in) 925460000
19.05 mm (3/4 in) 926460000
CAUTION:
While assembling, be careful to prevent any metal
chip, dust or dirt from entering the wheel cylinder.
G4M0405
2) Apply rubber grease to the boot inside as shown in
Figure.
Grease:
NIGLUBE RX-2 (Part No. 003606000)
CAUTION:
Never use brake grease.
G4M0401
E: INSTALLATION
1. WHEEL CYLINDER
Install wheel cylinder on back plate, and tighten bolts.
Tightening torque:
10±2 N⋅m (1.0±0.2 kg-m, 7.2±1.4 ft-lb)
42
4-4SERVICE PROCEDURE
3. Rear Drum Brake