ActionStep
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.
7
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.
8
Lift off the rinse chamber. Gently pull off the piston seal. Discard the used seal.9
Clean the pump head, rinse chamber and drain plate in an ultrasonic bath. If there are
particles on any surfaces, the check valves should be removed and cleaned separately,
see Section 7.6.8 Clean the pump head check valves, on page 296.
10
ÄKTA pure User Manual 29119969 AB 347
7 Maintenance
7.8 Replacement procedures
7.8.11 Replace pump piston seals of Pump P9-S
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