BD FACSCanto II - Page 177

Chapter 10: Maintenance 177
4 Lower the retainer down the SIT and let it rest on the aspirator arm.
5 Access the Bal seal at the notch on the right side of the SIT assembly.
Unseat the Bal seal by using the Bal seal removal tool (Figure 10-7 on
page 178) to gently pull it downward.