Reassembly; Troubleshooting Guide - Xylem GOULDS ICS Instruction Manual

screwdriver handle, push the stationary half of the seal
from the seal housing and discard it.
• To remove the shaft sleeve (126) it is necessary to
evenly heat the outside of the sleeve, with a hand
propane torch, while prying between the shaft shoulder
and the sleeve.
NOTICE: EXERCISE CARE HANDLING THE HOT
SHAFT SLEEVE.
• Removal of the 4 motor adapter screws (371) and mo-
tor adapter (108) from the motor completes the close
coupled unit disassembly.
• Disassembly of the bearing frame assembly is accom-
plished by removing the 4 frame adapter screws (371)
and removing the frame adapter (108) from the bearing
frame (228).
• Remove the 4 bearing cover (370C) screws, being care-
ful not to damage the lip seal (139). Inspect lip seal for
damage and replace as required.
• Remove the shaft assembly from the bearing frame, by
pulling the motor end of shaft out of the housing.
• Being careful not to damage the shaft, remove the snap
ring (361) and outer bearings (112) from the shaft. If
required remove the inner bearing (168). Inspect the
bearings for wear or damage and replace as necessary.
• Inspect the inner lip seal (138) and replace as required.
• Disassembly is complete.

REASSEMBLY

• Reassemble the bearing frame assembly in reverse
order of disassembly. Use appropriate tools for bear-
ing installation and press ONLY on inner bearing race.
Press bearings squarely and completely onto the shaft.
• If the shaft sleeve was replaced, it is required that the
new sleeve be bonded to the shaft using Loctite
or equivalent. Following the manufacturer's instructions
in the preparation of the sleeve and shaft, apply bond-
ing agent to the surfaces then slide the sleeve over the
shaft. Remove all excess bonding agent.
• Install the shaft assembly into bearing frame. DO NOT
damage the inner lip seal.
• Insert and tighten the 4 bearing cover screws.
• Install the bearing adapter, nameplate towards the
TOP, using the 4 screws.
• Inspect and remove any debris from the seal housing
stationary seat bore. Lubricate the outside diameter of
the new stationary seat with a good quality O-ring lu-
bricant and press seat squarely and completely into the
seal housing. With a clean, lint free cloth remove any
debris or lubricant from the seat face. DO NOT scratch
the face.
• Install a new seal housing O-ring on housing, then care-
fully slide seal housing over shaft and attach housing to
the motor adapter with the 4 screws. DO NOT damage
the mechanical seal stationary seat.
• Install the new shaft sleeve O-ring.
• Slide the new mechanical seal rotary assembly over
shaft sleeve. Apply Loctite™ 7649 and allow to dry.
Apply Loctite™ #243 to the motor shaft thread and
then screw on the impeller by turning impeller CLOCK-
WISE. Torque the impeller to 12 ft lbs (1.7 kg/m).
6
• Shim pack (330) permits renewal of impeller clearance
to compensate for impeller or casing wear. The shim
thicknesses, in the shim pack, range from 0.003" to
0.025" (0.08 mm to 0.64 mm). The factory shim pack
thickness is approximately 0.060" (1.52 mm). To set the
suggested nominal impeller clearance of 0.020" (0.51
mm) proceed as follows:
• Establish a shim pack thickness that allows for the
impeller to just touch the inside of the casing surface,
when pump is assembled.
• Add an additional 0.020" (0.51 mm) thickness of shims.
• When the proper impeller clearance has been
achieved, install and tighten the 4 casing screws.
• Install the 4 bearing frame holddown bolts for the
frame mounted units or the 4 motor holddown bolts for
the close coupled units.
• On frame mounted units, check the coupling alignment
as specified in the "MOTOR TO PUMP – SHAFT
ALIGNMENT" section of this manual.
• Inspect unit rotation for binding and correct as required.
• Reinstall the safety guard.
• Reassembly is complete.

TROUBLESHOOTING GUIDE

WARNING
Hazardous
voltage
MOTOR NOT RUNNING
See Probable Cause – 1 through 5
LITTLE OR NO LIQUID DELIVERED BY PUMP
#243
TM
See Probable Cause – 6 through 13
POWER CONSUMPTION TOO HIGH
See Probable Cause – 3, 13, 14, 15, 18
EXCESSIVE NOISE and VIBRATION
See Probable Cause – 3, 6, 7, 8, 10, 12, 14, 16, 17, 18
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 (3 phase only)
9. Low voltage or phase loss
10. Impeller worn or plugged
11. System head too high
12. NPSH too low – Suction lift or suction losses excessive
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
18. Pump and motor shafts misaligned
DISCONNECT AND LOCKOUT
ELECTRICAL POWER BEFORE
ATTEMPTING ANY MAINTENANCE.
FAILURE TO DO SO CAN CAUSE A
SHOCK, BURN OR DEATH.
SYMPTOM
PROBABLE CAUSE