GE AKTA avant Operating Instructions Manual page 160

7 Maintenance
7.2 Replace pump piston seal, O-rings, and rinse membrane of Pump P9 or Pump P9H
Assemble the pump head
Make sure to assemble the pump head correctly. Refer to
Step
1
2
3
4
5
6
7
8
Break in the new pump piston
seal
Follow the instruction below to break in the new pump piston seal of Pump P9 or P9H.
Step
1
2
160
Action
Insert the piston into the return spring. Insert piston and return spring into
hole in the pump module.
Note:
Do no touch the ceramic or glass part of the pump piston.
Wet the membrane in the hole with 20% ethanol before mounting.
Place the pump membrane housing onto the locating pins on the front of
the pump module.
Screw one of the two screws securing the pump membrane housing using
a star screwdriver, T20. Push firmly on the front of the pump membrane
housing to compensate for the pressure of the piston and then screw the
second screw.
Make sure that the new seal is wetted with 20% ethanol and then tighten
both screws fully.
Reconnect the tubing of the pump piston rinsing system.
Reconnect the inlet manifold.
Reconnect the tubing to the pump head, and reconnect the pump inlet
tubing.
Action
Fill a buffer vessel with 20% ethanol in water. Immerse the inlet tubing, for
example A1 for System Pump A, B1 for System Pump B, or S1 for the Sample
Pump in the buffer vessel. Place the buffer vessel on the buffer tray.
Prime the inlets and purge the pump, see
and purge system pumps, on page
Illustrations, on page
Section 4.5.1 Prime buffer inlets
86.
ÄKTA avant Operating Instructions 29101556 AB
153.