Bleeding The Hydraulic Brake System - Yamaha T135SE Service Manual

BLEEDING THE HYDRAULIC BRAKE SYSTEM

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EAS00133
BLEEDING THE HYDRAULIC BRAKE
SYSTEM
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Bleed the hydraulic brake system whenever:
99
the system is disassembled.
99
a brake hose is loosened, disconnected or
replaced.
99
the brake fluid level is very low.
99
brake operation is faulty.
NOTE:
9 Be careful not to spill any brake fluid or allow
the brake master cylinder reservoir to overflow.
9 When bleeding the hydraulic brake system,
make sure there is always enough brake fluid
before applying the brake. Ignoring this pre-
caution could allow air to enter the hydraulic
brake system, considerably lengthening the
bleeding procedure.
9 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:
9 hydraulic brake system
a. Fill the brake master cylinder reservoir to
the proper level with the recommended
brake fluid.
b. Install the brake master cylinder reservoir
diaphragm.
c. Connect a clear plastic hose 1 tightly to the
bleed screw 2 .
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake lever several times.
f. Fully pull the brake lever without releasing
it.
g. Loosen the bleed screw.
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