Bleeding The Hydraulic Brake System - Yamaha N MAX GPD150-A 2015 Service Manual

3. Hold the vehicle upright and apply the rear
brake several times.
4. Check:
• Brake hoses
Brake fluid leakage → Replace the brake
hose.
Refer to "REAR BRAKE" on page 4-49 and
"ABS (ANTI-LOCK BRAKE SYSTEM)" on
page 4-61.
EAS30893
BLEEDING THE HYDRAULIC BRAKE
SYSTEM
EWA14000
WARNING
Always bleed the brake system when the
brake related parts are removed.
ECA22780
NOTICE
• Bleed the brake system in the following or-
der.
• 1st step: Front brake caliper
• 2nd step: Rear brake caliper
EWA16530
WARNING
Bleed the ABS whenever:
• 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 to overflow.
• When bleeding the ABS, make sure that there
is always enough brake fluid before applying
the brake. Ignoring this precaution could allow
air to enter the ABS, 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:
• ABS
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Fill the brake master cylinder reservoir to the
proper level with the specified brake fluid.
b. Install the brake master cylinder diaphragm.
c. Connect a clear plastic hose "1" tightly to the
bleed screw "2".
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
PERIODIC MAINTENANCE
A
1
B
1
A. Front brake caliper
B. Rear brake caliper
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 and hold it in
position.
g. Loosen the bleed screw.
TIP
Loosening the bleed screw will release the pres-
sure and cause the brake lever to contact the
throttle grip or handlebar grip.
h. Tighten the bleed screw and then release the
brake lever.
i. Repeat steps (e) to (h) until all of the air bub-
bles have disappeared from the brake fluid in
the plastic hose.
j. Check the operation of the hydraulic unit.
Refer to "HYDRAULIC UNIT OPERATION
TESTS" on page 4-65.
ECA18060
NOTICE
Make sure that the main switch is turned to
"OFF" before checking the operation of the
hydraulic unit.
▼▼▼
k. After operating the ABS, repeat steps (e) to
(i), and then fill the brake master cylinder res-
ervoir to the proper level with the specified
brake fluid.
l. Tighten the bleed screw to specification.
3-12
2
2