Subaru Impreza 2003, Service Manual

Page: 2595 / 3610

BR-63
BRAKE
AIR BLEEDING
15.Air Bleeding
A: PROCEDURE
CAUTION:
• The FMVSS No. 116, fresh DOT3 brake fluid
must be used.
• Cover the bleeder with waste cloth when
loosening it to prevent brake fluid from being
splashed over surrounding parts.
• Do not allow brake fluid to come in contact
with vehicle body; wash away with water and
wipe off completely if spilled.
• 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.
1. MASTER CYLINDER
NOTE:
• If the master cylinder is disassembled or reser-
voir tank is empty, bleed the master cylinder.
• During the bleeding operation, keep the brake
reservoir tank filled with brake fluid to eliminate en-
try of air.
• The brake pedal operating must be very slow.
• For convenience and safety, two people should
do the work.
1) Loosen the wheel nuts, jack-up the vehicle, sup-
port it with safety stands, and remove the wheel.
2) Disconnect the brake line at primary and sec-
ondary sides.
3) Put a plastic bag cover on master cylinder.
4) Carefully depress and hold the brake pedal.
5) Close the outlet plug with your finger, and then
release the brake pedal.
6) Repeat step4) and 5) until the brake fluid is com-
pletely bled from outlet plug.
7) Remove the plastic bag.
8) Install the brake pipes to master cylinder.
Tightening torque:
15 N·m (1.5 kgf-m, 10.8 ft-lb)
9) Bleed air from the brake line. <Ref. to BR-63,
BRAKE LINE, PROCEDURE, Air Bleeding.>
2. BRAKE LINE
NOTE:
• During the bleeding operation, keep the brake
reservoir tank filled with brake fluid to eliminate en-
try of air.
• The brake pedal operating must be very slow.
• For convenience and safety, two people should
do the work.
1) Make sure that there is no leak from the joints
and connections of brake system.
2) Fit one end of vinyl tube into the air bleeder and
put the other end into a brake fluid container.
BR-00090
BR-00091
BR-00087