Subaru XT 1988 Service Manual page 993

4-4 BRAKES
1) Make sure that there is no leak from joints and connec-
tions of the brake system.
2) Fit one end of vinyl tube into the air bleeder and put the
other end into a brake fluid container.
3) Slowly depress the brake pedal and keep it depressed.
Then, open the air bleeder to discharge air together with the
fluid.
Release air bleeder for 1 to 2 seconds.
Next, with the bleeder closed, slowly release the brake pedal.
Repeat these steps until there are no more air bubbles in the
vinyl tube.
Allow 3 to 4 seconds between two brake pedal operations.
a. Brake pedal operation must be very slow.
b. Cover bleeder with waste cloth, when loosening it, to
prevent brake fluid from being splashed over surrounding
parts.
4) Tighten air bleeder securely when no air bubbles are
visible.
Air bleeder tightening torque:
7 - 9 N·m (0.7 - 0.9 kg-m, 5.1 - 6.5 ft-Ib)
5) Perform these steps for the brakes connecting to the
secondary chamber of master cylinder, first, and then for
the ones connecting to primary chamber. With all procedures
completed, fully depress the brake pedal and keep it in that
position for approximately 20 seconds to make sure that
there is no leak evident in the entire system.
Bleeding sequence
CD
-+
®
-+
@
-+
@
Front right
Primary
Front left
Fig. 112
Rear right
--.--
®
' - - - -
@
Rear left
L4-1011
6) If the pedal action is soft and spongy, or pedal travels
excessively, the system must be bled of air again.
7) Add brake fluid to the required level (MAX level) of
reserve tank.
8) As a final step, test run the vehicle at low speed and apply
brakes relatively hard 2 to 3 times to ensure that brakes
provide normal braking action on all four wheels without
dragging and uneven braking.
Replacement of Brake Fluid
46
To always maintain the brake fluid characteristics, replace the
brake fluid according to maintenance schedule or earlier than
that when used in severe condition.
REPLACEMENT
1) Either jack up the front end of vehicle and place a safety
stand under it, or drive vehicle onto the pit and then jack up
the front end.
2) Remove both left and right front wheels.
3) Remove filler cap from brake fluid tank.
Install one end of a vinyl tube onto the air bleeder of front
brake and insert the other end of the tube into a container to
collect the brake fluid.
To drain fluid into container, open the air bleeder and
repeatedly depress and release the brake pedal until a small
amount of fluid remains in the reservoir tank.
Then tighten the bleeder screw.
Fig. 113
a. The brake piping consists of a dual system, cross design.
The piping on the primary side connects the right front brake
and the rear left brake and the piping on the secondary side
connects the left front brake and rear right brake.
b. For convenience and safety, it is advisable to have two men
working.
c. Be careful not to spill brake fluid onto the painted surface.
d. Discard the drained brake fluid and do not reuse it.
4) Refill reservoir tank with recommended brake fluid.
Recommended brake fluid:
FMVSS No. 116, fresh DOT3 or 4 brake fluid