TEST OR INSPECTION
Do not engage water pump engine during procedure. Valve operations cab be checked
without water pump operations.
Valve motor operation can be checked either by noting vibration of valve assembly, or by
observing rotation of 7/16 in. hex at end of valve drive assembly worm gearshaft.
Do not remove cap from DRIVER MAIN INLET. Water may be released from system
when valve is operated.
Turn battery disconnect switch to ON position (WP 0007). While an assistant pushes
pump operator's panel DRIVER MAIN INLET valve control OPEN and CLOSE
buttons (WP 0004), check if DRIVER MAIN INLET valve control THROTTLED (yellow)
indicator illuminates and driver main inlet valve motor operates.
If indicator illuminates and valve motor operates, replace driver main inlet
valve drive assembly (WP 0388).