Thermo Scientific thermoscientific Vanquish Pumps C, Operating Manual

Page: 144 / 296

7 • Maintenance and Service
Page 144 Pumps C, Pumps F ( VC-Pxx, VF-Pxx)
Operating Manual
7.6.3 Replacing the Pistons
When
Damage of piston
Parts and additional items required
• 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.
Preparations
Remove the pump head (see Replacing the Pump Head ( } page 138) ).
Follow these steps
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 Cleaning the Piston
( } page 146) .
3. Replace the seal wash seals (see Replacing the Seal Wash Seals
( } 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.