Specifications

General Maintenance 4
5975 Series MSD Troubleshooting and Maintenance Manual 121
6 Reinstall the vent valve knob.
7 Pump down the MSD.
Figure 16 Vent valve O-ring
Vent valve knob
Vent valve O-ring
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. Be sure the O-ring stays in place.