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4 Operation and maintenance
883 Basic IC plus
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￭ Rinse the other parts of the piston with ultrapure water and dry
with a lint-free cloth.
3
Replacing the zirconium oxide piston
￭ Remove the retaining washer (23-2) from the old piston. If the
retaining washer sits too tightly, use a pointed object to loosen
the retaining washer.
￭ Assemble the retaining washer at the same point on the new pis-
ton.
4
Putting the piston cartridge together
￭ Insert the inner plastic sleeve, the spring and the spring retainer
into the piston cartridge.
￭ Slide the zirconium oxide piston carefully into the piston cartridge
until its tip emerges from the small opening of the piston car-
tridge.
￭ Attach the screw and tighten it by hand.
Mounting the piston
1
Reinserting the backup ring
Clean the backup ring (19-3) wit ultrapure water and reinsert it.
2
Reinserting the piston cartridge
Screw the assembled piston cartridge back into the pump head and
tighten, first by hand, then also using an adjustable wrench by
approx. 15°.
Clean the second piston cartridge in the same way.
Mounting the pump head
Accessories
For this step, you need the following accessories:
￭ 4 mm hex key (6.2621.030)
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