Bio-Rad ChromLab™ Software - Manual (Page 163)

System and Sample Pumps
Instrument Guide | 161
5. Locate the wash housing O-ring and the pump head small washer. If you do not
see them on the separated pump head:
 The O-ring might be attached to the wash housing.
 The small washer might have remained on the pump piston.
6. Remove and store the O-ring and small washer in a safe place such as a petri
dish or other small container.
Tip: You can remove the O-ring from its groove with a pair of tweezers if
necessary.
Note: Do not lose or damage the O-ring or small washer. The pump will
not operate without them.
7. (Optional) Remove the inlet and outlet check valves on the pump head.
Tip: It is not necessary to remove the inlet and outlet check valves unless
you plan to clean or replace them. See To remove the pump head check
valves on page 162 .
8. (Optional) Replace the pump head seal. For more information, see To replace
the pump head seal on page 167 .