Bleeding The Hydraulic Brake System - Yamaha 2012 Grizzly 300 Service Manual

BLEEDING THE HYDRAULIC BRAKE SYSTEM

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BLEEDING THE HYDRAULIC BRAKE
SYSTEM
WARNING
Bleed the hydraulic brake system when-
ever:
• the system is disassembled.
• a brake hose is loosened, disconnected or
replaced.
• the brake fluid level is very low.
• brake operation is faulty.
TIP
• Be careful not to spill any brake fluid or allow
the brake master cylinder reservoir or brake
fluid reservoir to overflow.
• 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.
• 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:
• hydraulic brake system
a. Fill the brake fluid reservoir to the proper
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level with the recommended brake fluid.
b. Install the diaphragm (brake master cylin-
der reservoir or brake fluid reservoir).
c. Connect a clear plastic hose
the bleed screw
Front
Rear
d. Place the other end of the hose into a con-
tainer.
e. Slowly apply the brake lever or brake pedal
several times.
f. Fully squeeze the brake lever or fully
depress the brake pedal and hold it in posi-
tion.
g. Loosen the bleed screw.
TIP
Loosening the bleed screw will release the
pressure and cause the brake lever to contact
the grip or the brake pedal to fully extend.
3-38
CHK
ADJ
tightly to
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