TEST OR INSPECTION
Open pump operator's panel housing (WP 0325). Check driver side pre-connect A
valve control wire harness at DRIVER SIDE PRE-CONNECT A valve control and driver
side pre-connect A valve motor for loose connections.
If driver side pre-connect A 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.
Remove pump house panel D (WP 0540). While an assistant pushes pump operator's
panel DRIVER SIDE PRE-CONNECT A valve control OPEN and CLOSE
buttons (WP 0004), check if DRIVER SIDE PRE-CONNECT A valve control yellow
indicator illuminates and driver side pre-connect A valve motor operates.
If indicator illuminates and valve motor operates, replace driver side
pre-connect A valve drive assembly (WP 0388).