TEST OR INSPECTION
Turn battery disconnect switch to OFF position (WP 0007). While an assistant holds
cab TANK TO PUMP switch in on position, check for continuity across TANK TO PUMP
switch, from terminal 5 to terminal 6.
If there is continuity, repair wire 2855 in cab pump control wire harness
if repairable (TM 9-2320-325-14&P), or replace cab pump control wire
harness (WP 0443).
If there is no continuity, replace cab TANK TO PUMP
switch (WP 0315).
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.
Release pump operator's panel TANK TO PUMP switch (WP 0004). While an assistant
puts cab TANK TO PUMP switch to closed position (WP 0004), check if tank-to-pump
valves operate to closed position.
If tank-to-pump valve does not operate to closed position, go to Step 14.