TEST OR INSPECTION
If air lines are under pressure when they are disconnected, they can whip around
and cause injury to personnel. Caution should be exercised when disconnecting
air line fittings.
Air lines may be under pressure when control valve is operated. If under pressure
and air lines are disconnected, air lines may whip around and cause injury to
personnel. Caution should be exercised when operating control valve with air lines
Disconnect air line at roof turret foam B multi-metering valve cylinder. While an
assistant pushes roof turret agent discharge button (WP 0004). Put cab FOAM
SYSTEM switch to on position (WP 0004). Put cab FOAM SELECT switch to B
position (WP 0004), check if air pressure is present at ground sweeps foam B multi-
metering valve cylinder.
If there is air pressure, replace foam system multi-metering
valve (WP 0292).