Yamaha YFM660FS, Supplementary Service Manual

Page: 192 / 478

3 - 45
CHK
ADJ
BLEEDING THE HYDRAULIC BRAKE SYSTEM
1.Bleed:
●
Brake system
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Air bleeding steps:
a. Add the proper brake fluid to the reservoir.
b. Install the diaphragm. Be careful not to spill
any fluid or allow the reservoir to overflow.
c. Connect the clear plastic hose
1
tightly to
the caliper bleed screw
2
.
È
Front
É
Rear
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake lever or pedal sev-
eral times.
f. Pull the lever in or push down on the pedal
and hold it.
g. Loosen the bleed screw and allow the lever
or pedal to travel towards its limit.
h. Tighten the bleed screw when the lever or
pedal limit has been reached, then release
the lever or pedal.
i. Repeat steps (e) to (h) until all the air bub-
bles have disappeared from the fluid.
j. Tighten the bleed screw.
NOTE:
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 system have disappeared.
k. Add brake fluid to the proper level.
Refer to “CHECKING THE BRAKE FLUID
LEVEL”.
WARNING
Check the operation of the brake after
bleeding the brake system.
*****************************************************
T
R
.
.
Bleed screw:
6 Nm (0.6 m • kg, 4.3 ft • lb)
È
É