Bio-Rad ChromLab™ Software - Manual (Page 181)

System and Sample Pumps
Instrument Guide | 179
6. Identify the pump head assemblies. To identify the left and right pump heads,
position both pump heads so the front of the pump head faces you and the
check valve OUT ports are visible.
 The left pump head has a straight edge on its right side.
 The right pump head has a straight edge on its left side.
Caution: Do not force the pump head into place. If the pump head does
not slide onto the housing easily, pull out the pump head and examine it for
any obstruction.
7. Slide the pump head over the studs on the pump face and gently push it into
place on the piston.