6EM Thru 18GM - 1100 Vertical Turbine Pumps 35
9. Specific gravity or viscosity of liquid
pumped is too high.
a. Reduce pump capacity.
Vibration or Noise
1. Foundation bolts loose or defect in
grouting.
a. Tighten foundation bolts and/or re-
grout.
2. Worn pump bearings.
a. Replace pump bearings.
3. Pipe strain-improperly supported or
improperly aligned.
a. Check pipe supports and adjust or
realign.
4. Head lower than rating, pumps too much
liquid.
a. Increase system head.
b. Reduce pump speed. Trim impeller.
5. Misalignment between driver and pump
a. Realign driver and pump.
6. Shaft bent.
a. Replace shaft.
7. Pump running at shut-off condition.
a. Open discharge valve. Check for
obstructions.
8. Insufficient suction bell submergence.
a. Increase submergence.
9. Low water level.
a. Increase wet well level.
10. Air in liquid.
a. Increase submergence to prevent
vortexing.
11. Impeller passages clogged.
a. Clean impeller passages.
12. Foreign object in pump.
a. Remove foreign object.
b. Check for damage.
13. Bad driver bearing.
a. Replace driver bearing.
14. Improper sump design.
a. Change sump design. Increase
submergence to prevent vortexing.
Execessive Packing Box Leakage
1. Gland not properly tightened.
a. Adjust packing gland.
2. Worn packing or sleeve.
a. Replace packing and/or sleeve.
3. Ends of packing not staggered.
a. Repack to stagger packing ends.
4. Bypass is plugged or restricted.
a. Clean by-pass line.
Over-Heating
1. Packing gland too tight.
a. Adjust packing gland.
2. Water flush line plugged.
a. Clean water flush line.
3. Shaft bent.
a. Replace shaft.
Motor Symptoms
The trouble or symptoms, their probable
causes and suggest remedies contained in
this trouble shooting guide will assist you in
quickly determining and correcting most
problems should they occur.
It is not the intent of Layne/Verti-Line to
replace the recommendations of the motor
manufacturer in regard to operation and
maintenance of the motor. Rather, this
guide is offered as a supplement to such
data.
Any specific questions or problems should
be directed to the manufacturer of the
motor. Be sure to supply relevant data from
the motor nameplate when inquiring about
service or maintenance.
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