PST2 400 Maintenance
wc_tx002010gb.fm 33
5.5 Impeller Inspection
See Graphic: wc_gr000411
5.5.1 Visually inspect impeller (w) for corrosion, wear or damage. Worn
impellers compromise peak performance.
5.5.2 Visually inspect impeller key and rotor shaft keyway for signs of
uneven wear.
5.5.3 Visually inspect volute (aa) casting for cracks, wear and damage. Look
for signs of wear on volute.