TEST OR INSPECTION
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
Valve operations can be checked by observing valve shaft rotation. Valves are open when
tabs or yellow paint tabs are aligned with direction of fluid flow.
If system air pressure is below 85 psi (586 kPa), start vehicle engine and allow system
air pressure to build to at least 85 psi (586 kPa) (TM 9-2320-347-10). Shut vehicle
engine off (TM 9-2320-347-10). Remove shield (WP 0493). While an assistant puts
and holds pump operator's panel TANK TO PUMP switch to OPEN position (WP 0004),
check if tank-to-pump valves operate to open position.
If tank-to-pump valves operate to open position, go to Step 26.
Check if tank-to-pump valves remain in open position after assistant releases pump
If tank-to-pump valves do not remain in open position, go to Step 17.