Reassembly; Troubleshooting; Motor Not Running - Xylem GOULDS HSC Manuel D'utilisation

8.3.11. Remove seal retainer.
8.3.12. Remove shaft extension using a screwdriver in
the slot or flats in the back of the motor to pre-
vent rotation and a wrench to turn extension.
8.3.13. Pry off the rotating element of the mechani-
cal seal from the motor shaft by using two (2)
regular screw drivers 180º apart and using the
motor adapter inner boss as a fulcrum point
and then prying seal up.
8.3.14. Remove the motor adapter bolts, washers and
o-rings.
8.3.15. Remove the motor adapter.
8.3.16. Remove the stationary element of the mechani-
cal seal by pushing it out from the motor side
with a blunt instrument.

9. REASSEMBLY

9.1. All parts should be cleaned before assembly.
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.
9.4. Observe the following when reassembling the liquid-
end:
9.4.1. All mechanical seal components must be in
good condition or leakage may result. Replace-
ment of complete seal assembly, whenever seal
has been removed, is good standard practice.
It is permissible to use a light lubricant, such as
glycerin, to facilitate assembly. Do not contam-
inate the mechanical seal faces with lubricant.
9.4.2. Inspect the o-rings and replace if damaged.
The o-rings may be lubricated with petroleum
jelly to ease assembly.
9.4.3. Inspect impellers for wear, degradation or
blockage. Clean or replace as necessary.
9.4.4. Inspect iron parts for excessive corrosion or
degradation. Replace as necessary.
9.4.5. Inspect stainless steel components for excessive
wear or degradation and replace as necessary.
9.4.6. Wear rings contained in the interstage(s) and
casing would need to be pressed or pried out
and pressed in should they need replacement.
9.5. Check reassembled unit for binding and correct as
necessary.
9.6. Be sure to tighten casing bolts in a criss-cross manner
to prevent o-ring binding and cracking of the casing
ears. Secure to 35 ft-lbs.
10. TROUBLESHOOTING CHART

MOTOR NOT RUNNING

(See causes 1 through 6)
LITTLE OR NO LIQUID DELIVERED
(See causes 7 through 16)
POWER CONSUMPTION TOO HIGH
(See causes 4, 16, 17, 18, 21)
EXCESSIVE NOISE AND VIBRATION
(See causes 4, 6, 9, 12, 14, 15, 17, 19, 20, 21)
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. Air or gasses in liquid
13. System head too high
14. NPSHA too low: Suction lift too high or suction
losses excessive. Check with vacuum gauge.
15. Impeller worn or plugged
16. Incorrect impeller diameter
17. Head too low, causing excessive flow rate
18. Viscosity or specific gravity too high
19. Worn bearings
20. Pump or piping loose
21. Pump and motor misaligned
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