Subaru Impreza 2002 Service Manual page 3016

15.Air Bleeding
A: PROCEDURE
CAUTION:
• The FMVSS No. 116, fresh DOT3 or 4 brake
fluid must be used.
• Cover the bleeder with waste cloth when
loosening 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:
• Start with the brakes (wheels) connected to the
secondary chamber of master cylinder.
• The time interval between two brake pedal oper-
ations (from the time when pedal is released to the
time when it is depressed another time) shall be ap-
prox. 3 seconds.
• The air bleeder on each brake shall be released
for 1 to 2 seconds.
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.
AIR BLEEDING
5) Close the outlet plug with your finger, and re-
lease the brake pedal.
6) Repeat step4) and 5) until the brake fluid is com-
pletey 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-57,
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.
S4M0540
BR-57
BRAKE
S4M0541