HYOSUNG MS3 250 Sercie Manual page 37

● Loosen the air bleeder valve and pump the brake
lever until the old brake fluid is completely out of
the brake system.
● Close the air bleeder valve and disconnect the
transparent hose. Fill the reservoir with new brake
fluid to the upper line.
● Replace the rear brake's fluid with the same man-
ner of the front brake.
Front brake caliper air bleeder valve
: 9 ~ 14 N∙ ∙ m (0.9 ~ 1.4 kgf∙ ∙ m)
Rear brake caliper air bleeder valve
: 9 ~ 14 N∙ ∙ m (0.9 ~ 1.4 kgf∙ ∙ m)
▣ ▣ AIR BLEEDING OF THE BRAKE FLUID
CIRCUIT
Air trapped in the brake fluid circuit acts like a cush-
ion to absorb a large proportion of the pressure
developed by the master cylinder and thus interferes
with the full braking performance of the brake caliper.
The presence of air is indicated by "sponginess"of
the brake lever and also by lack of braking force.
Considering the danger to which such trapped air
exposes the machine and rider, it is essential that,
after remounting the brake and restoring the brake
system to the normal condition, the brake fluid circuit
be purged of air in the following manner :
● Fill the master cylider reservoir to top of the
inspection window. Replace the reservoir cap to
prevent dirt from entering it.
● Attach a hose to the air bleeder valve, and insert
the free end of the hose into a receptacle.
● Bleed air from the brake system.
PERIODIC MAINTENANCE 2-20