Thermo Scientific Dionex UltiMate 3000 Series, Operating Instructions Manual, Page: 198 / 270

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
Page 190 Operating Instructions
7.6.2.2 Installing the Pistons and Pump Head
Description Part No.
Pump head (entire assembly)
NC pump
Loading pump
6041.1901A
6041.1902
Piston (2 pistons, sapphire) 6040.0042
1. If you removed the pistons
a) Place the plate of the rear seal wash system onto the pump head.
b) Inject a few drops of isopropanol into the piston cavities and insert the pistons.
c) Use the pump head tool (spacing tool) to establish the correct distance between the
piston and the plate of the rear seal wash system.
Place the spacing tool on the plate of the rear seal wash system and push both pistons
downward as far as possible. The distance is correct when both pistons touch the
spacing tool. Remove the tool.
Fig. 68: Establishing the distance
2. Place the pump head back into the pump and tighten the pump head screw with the
hexagon wrench (size 6) from the accessories kit of the module (recommended torque:
10 Nm).
If both pump heads of the NC pump were removed, be sure not to interchange them
during reinstallation. Note the label on the pressure transducer cable: A identifies the left
pump head; B identifies the right head.
Tip:
Replacement pump heads have no label. For easy identification for future
maintenance, consider marking the replacement pump heads accordingly.
Pump head tool