7.4 Replace pump pistons
Introduction
Follow the instructions to replace the pump pistons of the pumps P9, P9H and P9-S.
Always replace the O-rings, piston seals, and rinse membranes of both pump
heads of a pump at the same time.
Note:
NOTICE
•
Do not disassemble the pump head unless there is good reason
to believe that there is an internal leakage. A sign of leakage
is increasing pump rinsing solution volume. Always make sure
that sufficient spare components are available before attempt-
ing to replace a spare part.
•
Replacing spare parts. Read the instructions carefully. For
example, some individual parts of the pump head can be as-
sembled incorrectly. Check the orientation of each part before
continuing with the next instruction.
Maintenance interval
Replace the pump pistons if they are damaged.
Required material
The following materials are required:
•
Adjustable wrench
•
Star screwdriver, T20
•
Piston kit
ÄKTA avant Operating Instructions 29101556 AB 171
7 Maintenance
7.4 Replace pump pistons
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