9
O - LOCATING TROUBLE
1. No Liquid Delivered
a. Wrong direction of rotation
b. Speed too low - Check with revolution counter
c. Discharge head is too high
d. Impeller or pipe lines plugged
e. Pump not primed
f. Suction lift too high, over 15 feet (check with
vacuum gauge)
2. Not Enough Liquid Delivered
a. Discharge head higher than anticipated
b. Speed too low (check with revolution couter)
c. Air leaks in suction pipe or stuffi ng box.
d. Suction lift too high, over 15 feet (check with
vacuum gauge)
e. Impeller partially plugged
f. Not enough suction head for hot water
g. Mechanical defects
1. Impeller worn or damaged
2. Casing worn
h. Foot valve too small
i. Foot valve not immersed deep enough.
3. Not Enough Pressure
a. Air in water
b. Mechanical defects
c. Impeller diameter too small
d. Speed too low
4. Pump Works for a while, then Quits
a. Leaky suction line
b. Suction plugged
c. Suction lift too high, over 15 feet (check with
vacuum gauge)
d. Air or gas in liquid
5. Pump Takes Too Much Power
a. Speed too high
b. Liquid either viscous or heavier than water, or
both.
c. Impeller too large in diameter
d. Motor windings going bad
e. Bearings too tight
f. Shaft is bent
g. Strain on casing caused by piping misalignment
h. Head lower than rating
When ordering repairs, refer to drawing and give
information stamped on nameplate which is:
Figure Number, Pump Size and Serial Number. Unless
we have this information, we cannot identify pump and
guarantee the repairs to fi t.
