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
Air pressure is checked by disconnecting air lines at pump cooler valve and observing air
pressure escaping from air line, when pump cooler control valve is activated. Air will
escape from blue air line when PUMP COOLER switch is put to ON position, and escape
from red air line when PUMP COOLER switch is put to OFF position. System air pressure
may drop below 85 psi (586 kPa) during this procedure.
Disconnect air lines at pump cooler valve. Put cab or pump operator's panel PUMP
COOLER switch to ON and OFF positions (WP 0004), check if air pressure is present at
pump cooler valve.
If there is air pressure, replace pump cooler valve (WP 0578).