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
Ensure system air pressure is at least 85 psi (586 kPa) during this procedure. System air
pressure is required to activate valves.
Do not engage water pump engine during this procedure, except when performing
complete system checks. Valve operations can be checked without water pump
Do not operate WATER TANK DRAIN switch with blue air line connected to water tank
drain valve. If water tank drain opens inadvertently, water will discharge uncontrollably.
Air pressure is checked by disconnecting air lines at water tank drain valve and observing
air pressure escaping from air line, when water tank drain control valve is activated. Air
will escape from blue air line when WATER TANK DRAIN switch is put to OPEN position,
and escape from red air line when WATER TANK DRAIN switch is put to CLOSED
position. System air pressure may drop below 85 psi (586 kPa) during this procedure.