Troubleshooting Guide - Xylem GOULDS HMS Manuel D'installation

9.7 Check pump shaft runout. Maximum permissible is
.010 TIR.
9.8 Lubricate shaft coupling and seal housing stationary
seat holder with a 50/50 glycerin and water solution
prior to installation of mechanical seal components.
9.9 Apply Loctite "Primer 7649" and allow 2-3 minutes
to dry. Then apply Loctite #243 to impeller bolt (5).
Thread bolt into pump shaft and torque to 10 lb. ft. of
torque.
9.10 Inspect casing o-ring (15) and impeller o-rings (9) for
damage or wear and replace if necessary.
9.11 O-rings may be lubricated with glycerin and water
solution or petroleum jelly to ease assembly.
9.12 Tighten casing screws to 15 lb.ft. of torque using a
star pattern to prevent o-ring binding.

10. Troubleshooting Guide

MOTOR NOT RUNNING
(See causes 1 through 6)
LITTLE OR NO LIQUID DELIVERED
(See causes 7 through 17)
POWER CONSUMPTION TOO HIGH
(See causes 4, 17, 18, 19, 22)
EXCESSIVE NOISE AND VIBRATION
(See causes 4, 6, 9, 13, 15, 16,18,20, 21, 22)
PROBABLE CAUSE
1. Tripped thermal protector
2. Open circuit breaker
3. Blown fuse
4. Rotating parts binding
5. Motor wired improperly
6. Defective motor
7. Not primed
8. Discharge plugged or valve closed
9. Incorrect rotation
10. Foot valve too small, suction not submerged,
inlet screen plugged.
11. Low voltage
12. Phase loss (three phase only)
13. Air or gases in liquid
14. System head too high
15. NPSHA too low:
Suction lift too high or suction losses excessive
Check with vacuum gauge
16. Impeller worn or plugged
17. Incorrect impeller diameter
18. Head too low, causing excessive flow rate
19. Viscosity or specific gravity too high
20. Worn bearings
21. Pump or piping loose
22. Pump and motor misaligned
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