Replacing The Pistons - Thermo Scientific thermoscientific Vanquish Pumps C Operating Manual

7 • Maintenance and Service
7.6.3

Replacing the Pistons

When
Parts and additional items required
Preparations
Follow these steps
Page 144
Damage of piston
• Pistons
• Syringe filled with isopropanol
• Seal wash seals (and seal-handling tool)
• Seal wash liquid
• Solvent suitable for your application
NOTICE
All pumps except VC-P21 and VC-P33: Whenever you remove the pump
head, you must replace the seal wash seals.
Remove the pump head (see
1. Remove the pistons:
If the seal wash plate was removed together with the pump
¨
head: Hold down the seal wash plate onto the pump head and
pull out the pistons.
If the seal wash plate was removed separately: Pull out the
¨
pistons from the seal wash plate.
2. When reinstalling a piston that you removed
Clean the piston. Follow the steps in
(} page 146).
3. Replace the seal wash seals (see
(} page 154)).
4. To facilitate piston installation, inject a few drops of isopropanol into
the piston cavity in which you want to install the piston.
5. Place the spacing tool onto the pump head.
Replacing the Pump Head
Cleaning the Piston
Replacing the Seal Wash Seals
Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
(} page 138)).
Operating Manual