INSTALL LOWER CONTROLS ACTUATOR STRUCTURAL MANIFOLD CHECK VALVE
Prior to the installation of a new check valve, do
a visual inspection of it for damage.
Perform the following plunger pin stroking and
flow checks prior to installation:
Hold the check valve in your hand and press
the plunger pin on the top of it squarely
against a hard, flat surface.
The plunger pin must depress until its end is
flush with the body of the check valve.
Release the pin. It must freely and
immediately extend on its own.
Depress the plunger pin. Blow air through the
six small holes at the plunger end. Blow air
through the four large holes on the side of the
valve. The air must pass freely.
Release the plunger pin. Air must not pass
through either set of holes.
If the valve fails any of the tests in steps a
thru e, replace it.