Yamaha XJR1300(L) 99, Service Manual

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3-28
A
B
CHK
ADJ
BLEEDING THE HYDRAULIC BRAKE SYSTEM
WARNING
NOTE:
EAS00134
BLEEDING THE HYDRAULIC BRAKE SYS-
TEM
Bleed the hydraulic brake system whenev-
er:
S
the system was disassembled,
S
a brake hose was loosened or removed,
S
the brake fluid level is very low,
S
brake operation is faulty.
S
Be careful not to spill any brake fluid or allow
the brake master cylinder reservoir or brake
fluid reservoir to overflow.
S
When bleeding the hydraulic brake system,
make sure that there is always enough brake
fluid before applying the brake. Ignoring this
precaution could allow air to enter the hydrau-
lic brake system, considerably lengthening the
bleeding procedure.
S
If bleeding is difficult, it may be necessary to let
the brake fluid settle for a few hours.
Repeat the bleeding procedure when the tiny
bubbles in the hose have disappeared.
1. Bleed:
S
hydraulic brake system
a. Add the recommended brake fluid to the
proper level.
b. Install the diaphragm (brake master cylinder
reservoir or brake fluid reservoir).
c. Connect a clear plastic hose 1 tightly to the
bleed screw 2 .
A Front
B Rear
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake several times.
f. Fully squeeze the brake lever or fully de-
press the brake pedal and hold it in position.
g. Loosen the bleed screw.
This will release the tension and cause the
brake lever to contact the throttle grip or the
brake pedal to fully extend.
h. Tighten the bleed screw and then release the
brake lever or brake pedal.
i. Repeat steps (e) to (h) until all of the air
bubbles have disappeared from the brake
fluid in the plastic hose.
j. Tighten the bleed screw to specification.