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T R O U B L E S H O O T I N G
PROBLEM
PROBABLE CAUSE
REMEDY
4.
Pump is noisy.
a.
Magnetic turn.
a.
Consult motor manufacturer.
b.
Motor bearings are worn.
b.
Replace bearings.
c.
Foreign matter is rotating
c.
Remove casing and remove foreign
with impeller.
matter.
d.
Impeller is binding.
d.
See 3.b. on previous page.
e.
Motor hsaft is bent or worn.
e.
See 3.c. on previous page.
f.
Power frame shaft is bent
f.
See 3.d. on previous page.
or worn.
g.
Power frame bearings are
g.
See 3.e. on previous page.
worn.
h.
Excessive misalignment
h.
See 3.g. on previous page.
between pump and driver.
i.
Cavitation.
i.
See note on previous page.
5.
Excessive
a.
Pump is not leveled properly. a.
Level pump.
vibration
b.
Excessive misalignment
b.
See 3.g. on previous page.
c.
Impeller is damaged.
c.
Replace impeller.
d.
Piping is not supported.
d.
Support discharge and suction piping.
e.
Power frame shaft is bent
e.
See 3.d. on previous page.
or worn.
f.
Cavitation.
f.
See note on previous page.
6.
Pump leaks.
a.
Seal is worn or defective.
a.
Replace seal.
b.
Insufficient tension on seal
b.
Replace spring; adjust packing gland.
assembly.
c.
Damaged inlet or outlet.
c.
Replace casing.
d.
Backplate gasket is worn.
d.
Replace gasket.
e.
Clamp is loose.
e.
Tighten clamp.