GE AKTA avant Operating Instructions Manual page 166

7 Maintenance
7.3 Replace pump piston seal, O-ring, and rinse membrane of Pump P9-S
Step
6
7
8
166
Action
Place the pump head face down on the bench. Pull out the piston together
with the return spring.
Inspect the piston and return spring for sign of damage. If damaged, discard
the piston and return spring and use a new piston and return spring when
assembling the pump head.
Unscrew the two screws securing the drain plate and the rinse chamber.
Lift off the drain plate, and discard the membrane located between the drain
plate and the rinse chamber.
ÄKTA avant Operating Instructions 29101556 AB