TEST OR INSPECTION
Remove rings, wristwatches, neck chains, and any other jewelry before working
around vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry
and tools may short across electrical circuits and cause damage to equipment, or
severe burns or electrical shock to personnel.
Remove No. 1 driver side discharge valve flow sensor (WP 0390). Do not disconnect
wires from sensor. Press pump operator's panel NO. 1 DRIVER SIDE DISCHARGE
valve control FLOW button. While an assistant spins flow sensor paddle, check if a flow
reading is displayed when flow sensor paddle is spinning.
If a reading of 0 gpm (0 lpm) is displayed when the flow sensor paddle is
spinning, go to Step 16.
Install No. 1 driver side discharge valve flow sensor (WP 0390). Remove No. 1 driver
side discharge valve (WP 0485) and inspect it for damage and contamination.
If No. 1 driver side discharge valve is free from damage and
If No. 1 driver side discharge valve is damaged and/or contaminated,
repair (WP 0387) or replace No. 1 driver side discharge
valve (WP 0485).