Shimano ALFINE S7051 Series Dealer's Manual page 93

MAINTENANCE
In the case of 11-speed internal geared hub (Oil maintenance kit: Y13098023)
Cleaning the inside
Attach the bleed nipple to the hub shell.
1
Suck 25 ml of new oil into the syringe and connect it firmly to the tube.
2
3
After pulling back the piston to reduce the internal pressure, remove the bleed nipple.
4
(A)
5
To be continued on next page
Push the piston to inject the new oil into
the inside of the hub.
(A)
Install the O-ring and the oil port bolt.
(B)
(C)
93
Tightening torque
1 - 3 N·m
TECH TIPS
If the syringe or tube becomes dirty when
removing old oil or cleaning the inside of the
hub, clean the syringe and tube using parts
cleaner, etc., if necessary.
(A)
Piston
TECH TIPS
When the oil is forced in, the internal pressure
will increase and the piston may push back. If
the piston is periodically pulled back to
reduce the pressure inside the hub, the oil will
be easier to inject into the inside of the hub.
TECH TIPS
If the bleed nipple is removed without pulling
back the piston, the oil may flow back into
the piston together with air from inside the
tube and spill out of the piston.
(A)
3 mm hexagon wrench
(B)
Oil port bolt
(C)
O-ring
Tightening torque
2 - 3 N·m