Warranty

12
TROUBLESHOOTING
GUIDE
Read and understand safety and operating
instructions 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 volute
and trap are full of water. See priming instructions,
Page 9.
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. If suction trap gasket is defective, replace it.
5. 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
closure (vertically) to water source. Make sure
suction pipe is large enough.
Clogged pipe/trap/impeller, worn impeller:
6. Make sure suction trap is not clogged; if it is, clean
trap and strainer.
7. Make sure impeller is not clogged (follow steps 1
through 7 under “Removing Old Seal”, Page 10;
check impeller for clogging; follow steps 7 through 9
under “Installing New Seal”, Page 11, for
reassembly).
8. Impeller and diffuser may be worn. If so, order
replacement parts from Repair Parts List, Pages 13
and 14.
9. Pump may be trying to push too high a column of
water. If so, a “higher
head” pump is needed.
Electrical:
10. 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 company. Check
for loose connections.
11. 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.