TEST OR INSPECTION
Open pump operator's panel housing (WP 0325). Check discharge valve control wire
harness at NO. 1 DRIVER SIDE DISCHARGE valve control and No. 1 driver side
discharge valve motor for loose connections.
If discharge valve control wire harness connectors are loose, reconnect
loose connectors (WP 0453).
Engine may have to be running to provide enough power to operate valve control. Valve
will operate with less voltage, but only yellow indicator light will register on valve control.
Do not engage water pump engine during this procedure. Valve operations can be
checked without water pump operation.
Valve motor operation can be checked 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 No. 1 driver side discharge. Water may be released from system
when valve is operated.
While an assistant pushes pump operator's panel NO. 1 DRIVER SIDE DISCHARGE
valve control OPEN and CLOSE buttons (WP 0004), check if NO. 1 DRIVER SIDE
DISCHARGE valve control yellow indicator light illuminates and No. 1 driver side
discharge valve motor operates.
If yellow indicator light illuminates and valve motor operates, replace No. 1
driver side discharge valve drive assembly (WP 0388).