HALE AP, Technical Manual

Page: 59 / 177

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5.1.8 Cavitation
Table 18. Cavitation SCR Table
SYMPTOM CAUSE REMEDY
Pump Is Cavitating Discharging More Water
Than The Pump Is Taking In
Increase the flow into the pump with more
and/or larger intake lines.
Gate the discharge valves to reduce flow and
maintain pressure.
Air Leak Verify air bleeder on the suction tube is not
open.
Locate and eliminate all air leaks during
maintenance.
Drafting Too High Verify lift loss, hose friction, water tempera-
ture and other lift limiting factors are reduced
or eliminated.
Locate the pump closer to the water source.
Water Temperature Too
High
Reduce volume discharged by lowering RPM
or gating the discharge valves.
Locate a source of cooler water.
Table 19. Rotation SCR Table
SYMPTOM CAUSE REMEDY
Reduced Pressure To
60—100 psi And Reduced
Flow
Wrong Impeller Installed
See Figure 12
Verify the new impeller vanes are oriented
the same as the old impeller before installa-
tion. See Figure 12.
Wrong Application The pump was installed on an application for
which it was not intended i.e. front mount vs.
rear mount.
It is possible to reassemble the pump incorrectly or with the wrong parts. Always compare the
replacement parts with the original hardware. (See Figure 12.)
Figure 13. Engine Or Opposite Engine Rotation