HYOSUNG Aquil GV650, Service Manual

Page: 34 / 222

●
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
: 6~8 N ∙ m (0.6~0.8 kg ∙ m)
Rear brake caliper air bleeder valve
: 6~8 N
∙
m (0.6~0.8 kg
∙
m)
●
Loosen the air bleeder valve and pump the brake
lever until the old brake fluid is completely out of the
brake system.
2-19 PERIODIC MAINTENANCE
▣
AIR BLEEDING OF THE BRAKE FLUID
CIRCUIT
Air trapped in the brake fluid circuit acts like a cushion to
absorb a large proportion of the pressure developed by
the master cylinder and thus interferes with the full brak-
ing 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 fol-
lowing manner :
●
Fill the master cylider reservoir to top of the inspec-
tion 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.