Subaru Legacy 2003 Service Manual page 3291

BRAKE
11.Brake Fluid
A: INSPECTION
1) Check that brake fluid level remains between
"MIN" and "MAX". If out of the specified range, refill
or drain fluid. If fluid level becomes close to "MIN",
refill fluid.
2) Check fluid for discoloration. If fluid color has ex-
cessively changed, drain the fluid and refill with
new fluid.
B: REPLACEMENT
CAUTION:
• Be extremely careful not to spill brake fluid.
Brake fluid spilt on the vehicle body will harm
the painted surface; wash it off quickly if spilt.
• To always maintain the brake fluid character-
istics, replace the brake fluid according to
maintenance schedule or earlier than that when
used in severe condition.
• The FMVSS No. 116, fresh DOT3 or 4 brake
fluid must be used.
• Cover bleeder with waste cloth, when loosen-
ing it, to prevent brake fluid from being
splashed over surrounding parts.
• Avoid mixing different brands of brake fluid
to prevent degrading the quality of the fluid.
• Be careful not to allow dirt or dust to get into
the reservoir tank.
NOTE:
• During bleeding operation, keep the brake reser-
voir tank filled with brake fluid to eliminate entry of
air.
• Brake pedal operation must be very slow.
• For convenience and safety, two people should
do the work.
• The amount of brake fluid required is approxi-
mately 500 m2 (16.9 US fl oz, 17.6 Imp fl oz) for to-
tal brake system.
1) Either jack-up vehicle and place a safety stand
under it, or lift up vehicle.
2) Remove both front and rear wheels.
3) Draw out the brake fluid from master cylinder
with syringe.
4) Refill reservoir tank with recommended brake
fluid.
Recommended brake fluid:
FMVSS No. 116, fresh DOT3 or 4 brake fluid
BRAKE FLUID
5) Install one end of a vinyl tube onto the air bleeder
and insert the other end into a container to collect
the brake fluid.
CAUTION:
Brake fluid replacement sequence; (A) Front
right → → → → (B) Rear left → → → → (C) Front left → → → → (D) Rear
right
( A )
( 2 )
(1) Master cylinder
(2) Hydraulic unit
(3) Proportioning valve
6) Instruct your co-worker to depress the brake
pedal slowly two or three times and then hold it de-
pressed.
7) Loosen bleeder screw approximately 1/4 turn
until a small amount of brake fluid drains into con-
tainer, and then quickly tighten screw.
8) Repeat steps 6) and 7) above until there are no
air bubbles in drained brake fluid and new fluid
flows through vinyl tube.
NOTE:
Add brake fluid as necessary while performing the
air bleed operation, in order to prevent the tank
from running short of brake fluid.
9) After completing the bleeding operation, hold
brake pedal depressed and tighten screw and in-
stall bleeder cap.
Tightening torque (Bleeder screw):
8 N·m (0.8 kgf-m, 5.8 ft-lb)
10) Bleed air from each wheel cylinder using the
same procedures as described in steps 6) through
7) above.
BR-40
( 1 )
( 3 )
( C )
BR-00087
( D )
( B )
BR-00089