Agilent Technologies 5977B Series

140 5977B Series MSD Troubleshooting and Maintenance Manual
4 General Maintenance
6 Reinstall the vent valve knob.
7 Pump down the MSD.
Figure 21 Vent valve O-ring
Vent valve knob
CAUTION
Be very careful when reinstalling the vent valve knob. It is possible to cross thread the
knob and damage the threads in the valve body. Ensure the O-ring stays in place.