Shimano Ultegra R8050 Series Dealer's Manual page 88

INSTALLATION OF HYDRAULIC DISC BRAKE SYSTEM
Installation of the brake hose (easy hose joint system)
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To be continued on next page
Make adjustments, such as changing the
angle of the handlebar, so that the head
of the bleed screw is parallel to the
ground.
Plug the oil funnel with the oil stopper
(B)
so that the O-ring mounted side is facing
downward.
(A)
Remove the oil funnel and funnel
adapter while still plugged with the oil
stopper.
Attach the O-ring to the bleed screw and
tighten it while letting oil flow out so as
to make sure that no air bubbles remain
inside the reservoir tank.
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(A)
O-ring
(B)
Oil stopper
Tightening torque
0.5 - 0.7 N·m
NOTE
•
Do not operate the brake lever. Otherwise,
air bubbles may enter the cylinder.
•
Use a waste cloth to prevent the oil from
flowing to surrounding areas.