1900 Series Horizontal Splitcase Pumps
Instruction and Repair Manual
19
11/12/18
TROUBLE
PROBABLE CAUSE
REMEDY
7. Pump is noisy or has excessive
vibration.
a. Magnetic hum.
a. Consult motor manufacturer.
b. Motor bearings are worn.
b. Replace bearings.
c. Foreign material in impeller.
c. Remove foreign material.
d. Impeller is binding.
d. See 6f above.
e. Motor shaft is bent or worn.
e. See 6g above.
f. Drive and pump are misaligned.
f. See 6h above.
g. Power frame shaft is bent.
g. See 6i above.
h. Foundation is not rigid.
h. Strengthen foundation; change
method of mounting pump unit.
i. Worn bearing in power frame.
i. Replace bearing.
j. Impeller is damaged.
j. See 3h above.
k. Lack of lubrication in power frame.
k. Lubricate power frame bearing;
replace bearings if damaged.
l. Pump is not properly leveled.
l. Check levelness of pump.
m. Piping is not supported.
m. Provide support for suction and
discharge piping.
n. Pump is cavitating.
n. Re-evaluate pump application;
consult local Fairbanks Nijhuis™
sales office.
