Assembly; Troubleshooting; Motor Not Running - Xylem GOULDS NPO Manual De Instrucciones

If necessary, remove the four motor hex bolts (371) and
CAREFULLY slide the motor adapter from the shaft.
Replace the motor assembly and deflector (123), as
required.
Disassembly is complete.

ASSEMBLY

If removed, replace the motor shaft deflector. Install the
motor adapter, with the drain opening DOWN, using the
four hex bolts. Torque bolts to 168 lbs. in. (19 N m).
Slide the seal housing assembly onto the motor shaft,
seating it fully and squarely against the motor adapter.
Using a quality grade O-ring lubricant, lubricate the outer
elastomer of the mechanical seal stationary seat. Fully
and squarely install the stationary seat into the seal hous-
ing. With a clean, lint free cloth, CAREFULLY wipe the
seat face clean of a lubricant or debris. DO NOT damage
the seat face.
Using a quality grade O-ring lubricant, lubricate the
inner elastomer of the mechanical seal rotary assembly.
Fully and squarely install the rotary assembly against the
stationary seat.
To install impeller, clean shaft and impeller thoroughly
with denatured alcohol and a wire brush to remove cured
Loctite from threads. Wait for parts to dry then apply Loc-
tite 7649 primer to threads on shaft and impeller. Allow
3-5 minutes for primer to dry. Apply 3 drops of Loctite
243 medium strength thread-locker to shaft threads and
2 drops on impeller threads. Tighten impeller to a torque
value of 144 lbs. in. (16 N m).
Using a quality grade O-ring lubricant, lubricate and
install a new casing O-ring and internal O-ring (1SN only).
Slide the back pullout assembly into the pump casing
and secure using the eight casing cap screws. Torque
the cap screws to 70 lbs. in. (8 N m), using a cross pattern
sequence to assure the casing is pulled down evenly.
With new O-rings installed, install the casing vent and
drain plugs, tightening securely.
Assembly is complete.

TROUBLESHOOTING

FAILURE TO DISCONNECT AND
WARNING
LOCKOUT ELECTRICAL POWER
Hazardous
BEFORE ATTEMPTING ANY MAINTE-
voltage
NANCE CAN CAUSE SHOCK, BURNS
OR DEATH.
SYMPTOM

MOTOR NOT RUNNING

See Probable Causes 1 through 5
LITTLE OR NO LIQUID DELIVERED
See Probable Causes 6 through 13
EXCESSIVE POWER CONSUMPTION
See Probable Causes 3, 13, 14, 15 and 16
EXCESSIVE NOISE AND VIBRATION
See Probable Causes 3, 6, 7, 8, 10, 12, 14, 16 and 17
PROBABLE CAUSES
1. Motor thermal protector tripped
2. Open circuit breaker or blown fuse
3. Impeller binding
4. Motor improperly wired
5. Defective motor
6. Pump is not primed, air or gases in pumpage
7. Discharge, suction plugged or valve closed
8. Incorrect rotation (three phase only)
9. Low voltage or phase loss
10. Impeller worn or plugged
11. System head too high
12. NPSH too low – Excessive suction lift or losses
A
13. Incorrect impeller diameter
14. Discharge head too low – excessive flow rate
15. Fluid viscosity, specific gravity too high
16. Worn bearing
17. Pump, motor or piping loose
5