Air Bleeding (Hydraulic Brake System) - Yamaha TTR250L Service Manual

AIR BLEEDING (HYDRAULIC BRAKE SYSTEM)

Å
ı
NB1A3013
AIR BLEEDING (HYDRAULIC BRAKE
SYSTEM)
WARNING
Bleed the brake system if:
The system has been disassembled.
A brake hose has been loosened or removed.
The brake fluid is very low.
The brake operation is faulty.
A loss of braking performance may occur
if the brake system is not properly bled.
1.Bleed:
Brake fluid
*********************************
Air bleeding steps:
a.Add 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 a clear plastic tube 1 tightly to
the caliper bleed screw 2.
Å Front
ı Rear
d.Place the other end of the tube 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.
Hold the lever or pedal in position.
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.
Bleed screw 2:
6 Nm (0.6 m • kg, 4.3 ft • lb)
i. Repeat steps (e) to (h) until the air bubbles
have been removed from the system.
NOTE:
If bleeding is difficult, it may be necessary
to let the brake fluid system stabilize for a
few hours. Repeat the bleeding procedure
when the tiny bubbles in the system have
disappeared.
j. Add brake fluid to proper level.
3 - 32
CHK
ADJ