GE AKTApure, User Manual, Page: 342 / 522

Assemble the pump head
Make sure to assemble the pump head correctly. Refer to Illustrations, on page 336.
Action Step
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.
1
Wet the membrane in the hole with 20% ethanol before mounting. 2
Place the pump membrane housing onto the locating pins on the front of the pump
module. 3
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. 4
Make sure that the new seal is wetted with 20% ethanol and then tighten both screws
fully. 5
Reconnect the tubing of the pump piston rinsing system. 6
Reconnect the inlet manifold. 7
Reconnect the tubing to the pump head, and reconnect the pump inlet tubing. 8
Break in the new pump piston seal
Follow the instruction below to run in the new pump piston seal of pumps P9 and P9H.
Action Step
Fill a buffer vessel with 20% ethanol in water. Immerse the inlet tubing, for example A1
for System pump A, or B1 for System pump B, in the buffer vessel. Place the buffer vessel
on the Buffer tray. 1
Prime the inlets and purge the pump, see Section 5.4.1 System pumps, on page 162. 2
• For pump P9: Connect tubing that gives a back pressure of 6 to 8 MPa to one of the
column positions of the Column valve or between the Injection valve and the UV
monitor.
• For pump P9H: Connect tubing that gives a back pressure of 2 to 3 MPa to one of the
column positions of the Column valve or between the Injection valve and the UV
monitor.
3
Immerse the waste tubing in the buffer vessel to recirculate the liquid. 3
342 ÄKTA pure User Manual 29119969 AB
7 Maintenance
7.8 Replacement procedures
7.8.10 Replace pump piston seals of Pump P9 or P9H