7.2 Replace pump piston seal, O-rings, and rinse mem-
brane of Pump P9 or Pump P9H
Introduction
Follow the instructions to replace the O-rings, piston seal, and rinse membrane of pumps
P9, P9H A, P9H B, or P9H S.
Always replace the O-rings, piston seals, and rinse membranes of both pump
heads of a pump at the same time.
Note:
A sign of internal leakage is that the pump rinsing solution volume starts to
increase.
Tip:
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 O-rings, piston seals, and rinse membranes the pumps P9, P9H A, P9H B,
and P9H S if they are damaged. After replacement, perform a run to break in the new
piston seals.
NOTICE
Advanced maintenance. Read the instruction carefully before
disassembly of the pump head.
152 ÄKTA avant Operating Instructions 29101556 AB
7 Maintenance
7.2 Replace pump piston seal, O-rings, and rinse membrane of Pump P9 or Pump P9H
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