Cleaning The Piston - Thermo Scientific Vanquish VH-P10 Operating Manual

7.6.4

Cleaning the Piston

When
Items required
Follow these steps
Vanquish Pumps (VH-P10) Operating Manual
When reinstalling the piston you removed
•
Dry, lint-free tissue
• Isopropanol
1. Inspect the piston for signs of damage.
TIP When the entire piston is still black and the fingernail test does not
reveal rough areas on the piston surface, the piston is in good condition.
2. Carefully rinse the piston, preferably using isopropanol.
3. With a dry, lint-free tissue, rub the piston several times.
4. Recommended
Even if the piston seems to be clean, perform the fingernail test:
a) Hold the piston and carefully move your fingernail over the
piston surface.
The piston is clean when the fingernail test does not reveal
inconsistent or rough areas.
b) Repeat steps 2
5. When no damage is visible and the piston is clean, reinstall the
piston. If the piston is scratched or scored, install a new piston.
7
and 3.
• Maintenance and Service
Page 139