Bio-Rad ChromLab™ Software - Manual (Page 172)

A | Maintaining the Instrument
170 | NGC Chromatography Systems and ChromLab Software
Removing the Piston
Caution: Use extreme caution when removing the piston. The sapphire piston
can easily break if dropped or bent.
To remove the piston
1. Complete the steps in the sections Removing the Pump Heads on page 159
and Removing the Wash Housing on page 169 .
2. Remove the wash housing seal from the piston if it did not detach with the
wash housing.
Store the wash housing seal in a safe place such as a petri dish or other small
container if you plan to reuse it.
3. Remove the large washer from the piston.
a. Locate the small flathead screwdriver provided in the fittings kit.
b. Insert the screwdriver into the flat area behind the large washer.
c. Gently slide the large washer away from the front panel with the
screwdriver until you can reach it with your fingers.
4. Gently pull the large washer off the piston. Store the washer in the same
container as the wash housing seal.