10
TROUBLESHOOTING
GUIDE
Read and understand safety and operating instruc-
tions in this manual before doing any work on
pump!
Only qualified personnel should electrically test
pump motor!
FAILURE TO PUMP;
REDUCED CAPACITY OR
DISCHARGE PRESSURE
Suction leaks/lost prime:
1. Pump must be primed;
make sure that pump vo-
lute and trap are full of
water. See priming in-
structions, Page 7.
2. Make sure there are no
leaks in suction piping.
3. Make sure suction pipe
inlet is well below the
water level to prevent
pump from sucking air.
4. Suction lift of 15 to 25
feet (4.5 to 7.5 meters)
will reduce performance. Suction lift of more than
25 feet (7.5 meters) will prevent pumping and cause
pump to lose prime. In either case, move pump clo-
sure (vertically) to water source. Make sure suction
pipe is large enough.
Clogged pipe/impeller, worn impeller:
5. Make sure impeller is not clogged (follow steps 1
through 6 under “Removing Old Seal”, Page 8; check
impeller for clogging; follow steps 7 through 11 under
“Installing New Seal”, Page 9, for reassembly).
6. Impeller and diffuser may be worn. If so, order re-
placement parts from Repair Parts List, Page 11.
7. Pump may be trying to push too high a column of
water. If so, a “higher head” pump is needed.
Electrical:
8. Pump may be running too slowly; check voltage at
motor terminals and at meter while pump is running.
If low, see wiring instructions or consult power com-
pany. Check for loose connections.
9. Pump may be too hot.
A. Check line voltage; if less than 90% or more
than 110% of rated voltage consult a licensed
electrician.
B. Increase ventilation.
C. Reduce ambient temperature.
D. Tighten any loose connections.
MECHANICAL TROUBLES AND NOISE
1. If suction and discharge piping are not adequately
supported, pump assembly will be strained. See
“Installation”, Page 3.
2. Do not mount pump on a wooden platform!
Securely mount on concrete platform for quietest
performance.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.
