Reassembly; Troubleshooting; Motor Not Running - Xylem Goulds LC Manual De Instruccion

8.2.7 Remove the last stage impeller and last stage
diffuser.
NOTE: Further disassembly will require removal of the
mechanical seal. It is recommended that a new
mechanical seal be installed at reassembly.
8.2.8 Lubricate the shaft with a 50/50 solution of
glycerin and water. Remove the rotary portion
of the mechanical seal.
8.2.9 Remove the pump body and motor adapter as-
sembly from the motor.
8.2.10 Remove the stationary portion of the mechan-
ical seal from the pump body.
8.2.11 Remove the motor adapter from the pump
body.
8.2.12 To remove the pump shaft from the motor.
Heat must be applied to the pump shaft at the
largest diameter. This is required to break the
bond of the Loctite
and motor shafts.

9. REASSEMBLY

9.1 All parts should be cleaned before reassembly.
9.2 Refer to parts list to identify required replacement
items. Specify pump index or catalog number when
ordering parts.
9.3 Reassembly is the reverse of disassembly.
Observe the following when reassembling the pump:
9.4 Check the shaft runout. Maximum permissible is
.010" TIR at the end of the shaft.
9.5 Apply Loctite 'PrimerN' and Loctite
shaft, thread pump shaft in place and torque to 30 lb.
of torque.
9.6 Lubricate pump shaft and pump body stationary seat
holder with a 50/50 glycerin and water solution prior
to installation of mechanical seal components.
9.7 Inspect casing o-ring and impeller o-rings for damage
or wear and replace if necessary.
9.8 O-rings may be lubricated with glycerin and water
solution or petroleum jelly to ease assembly.
9.9 Tighten casing screws to 10 lb.ft. of torque using a
star pattern to prevent o-ring binding.
#271 between the pump
®
#271 to motor
®
10. TROUBLESHOOTING CHART

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 (3-phase only)
13. Air or gasses 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 too high
20. Worn bearings
21. Pump or piping loose
22. Pump and motor misaligned
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