Installing the Vacuum Control Valve

Fig 1: Identifying Vacuum Hose, Front Screw And Rear Screw

Courtesy of VOLVO CARS OF NORTH AMERICA.

Clean the mating surfaces
Position the valve by first installing the front screw. Install the rear screw. Tighten the screws
Reconnect the connector (press in the retaining clip while connecting the connector)
Connect the vacuum hose to the valve.