Brake Fluid - Subaru Legacy 2003 Service Manual

PERIODIC MAINTENANCE SERVICES

20.Brake Fluid

A: REPLACEMENT
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
NOTE:
• 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.
Bleeding sequence (1) → (2) → (3) → (4)
( 1 )
( 5 )
( 6 )
( 3 )
(1) Front right
(2) Rear left
(3) Front left
(4) Rear right
(5) Secondary
(6) Primary
5) Install one end of a vinyl tube onto the air bleeder
and insert the other end of the tube into a container
to collect the brake fluid.
BRAKE FLUID
( 4 )
( 2 )
PM-00047
PM-00048
PM-34
NOTE:
• Cover bleeder with waste cloth, when loosening
it, to prevent brake fluid from being splashed over
surrounding parts.
• During bleeding operation, keep the brake re-
serve tank filled with brake fluid to eliminate entry of
air.
• Brake pedal operation must be very slow.
• For convenience and safety, it is advisable to
have two men working.
• 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.
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:
8 N·m (0.8 kgf-m, 5.8 ft-lb)
10) Bleed air from each wheel cylinder by following
the previous 5 steps.
11) Depress brake pedal with a force of approxi-
mately 294 N (30 kgf, 66 lb) and hold it there for ap-
proximately 20 seconds. At this time check pedal to
see if it makes any unusual movement. Visually in-
spect bleeder screws and brake pipe joints to make
sure that there is no fluid leakage.
12) Install wheels, and drive vehicle for a short dis-
tance between 2 to 3 km (1 to 2 miles) to make sure
that brakes are operating properly.