Shimano ALFINE Inter-11 Dealer's Manual page 44

MAINTENANCE
For internal 11-speed (oil maintenance kit: Y13098023)
Internal geared hub: Oil replacement
Draining out the old oil
1
2
To be continued on next page
Using a stand, etc., enable the rear wheel to
turn while performing work.
Rotate the wheel slowly until the oil port
(A)
is facing up.
Remove the oil port screw and O-ring.
(A)
(B)
(C)
44
(A)
Oil port
(A)
3 mm hexagon wrench
(B)
Oil port screw
(C)
O-ring
NOTICE
Be careful that the oil port is facing up; if the
oil port screw is loosened when it is not facing
up, the oil inside may leak out.