Insert the new antenna rotary
joint into the pedestal housing, rotating the antenna rotary joint as necessary
to set it flat against its mounting hole inside the pedestal housing and seat it
correctly in the hole at the top of the pedestal.
The gasket on the antenna rotary joint is keyed to fit in the pedestal
housing in a certain orientation relative to the antenna arms.
Using a 6 mm hex wrench, install the antenna rotary joint screw and washer.