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.
Release pump operator's panel PUMP COOLER switch (WP 0004). Put cab PUMP
COOLER switch to off position (WP 0004), check if pump cooler valve operates to
If pump cooler valve does not operate to closed position, go to Step 16.