Thermo Scientific Dionex UltiMate 3000 Series, Operating Instructions Manual

Page: 205 / 270

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Operating Instructions Page 197
7.6.3.3 Installing the Piston Seals and Reassembling the Pump Head
Description Part No.
Main piston seal (reversed phase)
( → Fig. 65, page 184, no. 7 )
NC pump and loading pump (2 seals)
6266.0305
Support ring ( → Fig. 65, no. 6) for
NC pump and loading pump
6040.0012
Tip: Never reassemble the pump head with bare hands. Put on a pair of clean room
gloves to prevent contamination on the pump parts. Even minute particles may
cause damage to the system and result in poor pump performance.
1. The support ring is not a wear part and thus, you need not replace the support ring
when you replace the piston seal. However, before reinstalling the support ring, you
should clean the support ring from the inside and outside, by using isopropanol, a
cleaning swab (part no. 6040.0006), and a lint-free cloth or tissue.
2. Pipette a few drops of isopropanol onto the edge in the pump head on which the piston
seal will rest.
3. First, slide the support ring, and then slide the piston seal onto the seal insertion tool
( → Fig. 70, page 195). Mind the correct orientation of the seal. The open side of the
seal must face away from the tool.
Fig. 72: Correct orientation of the piston seal
4. Push the piston seal tool into the pump head as far as it goes in.
This side faces away
from the tool.