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To install the new backup piston seal:
1. Lift the spacer off the pump head.
2. Remove the seal holder from the spacer, using one of the following methods:
•
With the seal holder facing up, cup the spacer
in your hand and blow clean laboratory air at
the spacer to dislodge the seal holder.
–or–
•
Insert a thin object or pointed tool into the
small notch on the spacer and carefully pry out
the seal holder. Be careful not to scratch the
spacer.
3. Insert a thin object (for example, the straightened end of a paper clip) into the
spacer and carefully pry the backup piston seal out of the spacer. Be careful
not to scratch the spacer.
Doc. 155028-01 08/20
Figure 5-7. Secondary Pump Head
5 • Service
Notch
Spacer
Seal
Holder
75
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