1100 Series Nano Pump Service Manual 121
Repairing the Pump 3
2 Using a 4-mm hexagonal key step wise loosen and
remove the two pump head screws and remove the
pump head from the pump drive.
3 Place the pump head on a flat surface. Loosen the
lock screw (two revolutions). While holding the
lower half of the assembly, carefully pull the pump
head away from the plunger housing.
4 Remove the support rings from the plunger housing
and lift the housing away from the plungers.
Pumphead screws
Lock screw
Pump head
Support rings
Plunger housing
Plunger
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