GE AKTA avant Operating Instructions Manual page 156

7 Maintenance
7.2 Replace pump piston seal, O-rings, and rinse membrane of Pump P9 or Pump P9H
Step
6
7
156
Action
Place the front section of the pump head face down on the bench. For Pump
P9, unscrew the two screws of the support washer using a star screwdriver,
T20. For Pump P9H, unscrew the four screws of the support washer using
a star screwdriver, T10. Discard the O-ring (1) on the support washer, and
the discard the piston seal (2) located in the front section of the pump head.
Note:
Be careful not to scratch the metal surfaces.
Pump P9
2
Unscrew one of the two screws securing the pump membrane housing using
a star screwdriver, T20. Unscrew the second screw, and at the same time
push firmly on the front of the pump membrane housing to compensate for
the pressure of the piston return spring.
1
ÄKTA avant Operating Instructions 29101556 AB
Pump P9H
2
1