Beckman Coulter AutoMate 2500 Series Instructions For Use Manual page 134

User Maintenance
Aliquot Module Maintenance
5
Turn the lever up to lock the pump in place.
6
When turned up, the locking pin moves to the right. It locks the pipettor in position so
that the integrated spring mechanism does not release the pipettor.
7
Hold the tip carrier firmly. Turn the retaining nut counter-clockwise (also indicated on
top of the retaining nut).
8
Remove the tip carrier. Confirm that the O-ring is still inserted in the groove on the tip
carrier. If the O-ring is missing or looks damaged, replace it with a new one. If the O-
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