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.
While an assistant puts cab PUMP COOLER switch to on position (WP 0004), check if
pump cooler valve operates to open position.
If pump cooler valve does not operate to open position, go to Step 34.
Put cab PUMP COOLER switch to off position (WP 0004). Put pump operator's panel
FOAM FLUSH switch to ON position (WP 0004). Check if FOAM FLUSH indicator
If FOAM FLUSH indicator does not illuminate, go to Step 32.