Air Bleeding - Yamaha SR125 1997 Service Manual

AIR BLEEDING

EB304070
AIR BLEEDING
(HYDRAULIC BRAKE SYSTEM)
WARNING
Bleed the brake system whenever:
S The system is disassembled.
S A brake hose is loosened or removed.
S The brake fluid level is very low.
S Brake operation is faulty.
Loss of braking performance may occur if
the brake system is not properly bled.
1. Bleed:
S Brake system
***************************************
Air bleeding steps:
a. Fill the reservoir with the proper brake fluid.
b. Install the diaphragm. Be careful not to spill
any fluid or allow the reservoir to overflow.
c. Connect a clear plastic hose 1 tightly to the
caliper bleed screw 2 .
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake lever several times.
f. Pull the lever in. Hold the lever in position.
g. Loosen the bleed screw and allow the lever
to travel towards its limit.
h. Tighten the bleed screw when the lever limit
has been reached, then release the lever.
i. Repeat steps (e) to (h) until all air bubbles
have disappeared from the brake fluid.
NOTE:
When bleeding the brake system, make sure
that there is always enough brake fluid in the
brake fluid reservoir before applying the brake
lever. Ignoring this precaution could allow air to
enter the brake system, considerably lengthen-
ing the bleeding procedure.
3-21
INSP
ADJ