3
Fig. 2
Wrong
Correct
Fig. 3
ADAPTER POSITION
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
Pump will not pump
Air leak in suction line.
Make sure suction hose is double-clamped at joints, clamps
are tight, fi ttings have thread compound and are tight, no
nicks or cuts in hose.
The suction and/or discharge line(s) may be blocked, or
the valve(s) are closed, faulty and/or blocked.
Check to see that the lines and valves are in good work-
ing order.
End of suction line is not submerged.
Increase its length, or move pump closer to source of
liquid.
Total head is too high for this pump to work against.
Reduce total head or use a higher-head pump.
Pump doesn’t catch prime
Excessive suction lift*.
Move the pump closer to liquid source.
Priming takes a long time
Suction line is quite long.
Refer to “start-up” under operation.
Air pockets or leaks in the suction line.
Check the line for loose connections.
Pump does not perform as well as it
should
Flow is restricted due to:
a) Debris build-up.
b) Faulty or semi-open valve(s).
c) Piping/hosing used is smaller than the thread sizes
on the pump.
a) Clean the lines and fi ttings.
b) Check to see that the valves are in good working order.
c) Increase size of hose/pipe to reduce friction losses.
Insuffi cient submergence of the end of the suction line.
The end of the suction line must be submerged.
Excessively worn impeller**.
Replace impeller.
Seal is damaged***. Liquid will be leakingthrough the
middle of the adapter.
Replace seal.
Air pockets or leaks in the suction line.
Check suction line.
Clogged impeller.
Remove casing to clean out.
Pump loses prime
Liquid level drops below the end of the suction line.
Increase length of suction line or move the pump closer
to the liquid source.
*
Excessive suction lift must take into consideration:
a)
Size and length of pipe
b)
Density and temperature of liquid
c)
Pipe
fi tting
d)
Elevation above sea level
Including all of the above, we recommend that the total suction
head not exceed 25 ft.
**
An excessively worn impeller is mainly caused from
cavitation which is caused by a number of situations.
Examples:
a)
Restricted
suction
b)
Excessive suction lift
***
The seal may be damaged due to:
a)
Normal
wear
b)
Overheating
c)
Pumping chemicals that this seal is not designed for
