7.3 Assembly troubleshooting
Symptom
Cause
Remedy
There is excessive shaft end play.
The internal clearance of the bearings
exceeds the recommended amount.
Replace the bearings with a
bearing of the correct type.
The snap ring is loose in the bearing-
housing groove.
Re-seat the snap ring.
There is excessive shaft and sleeve
runout.
The sleeve is worn.
Replace the sleeve.
The shaft is bent.
Replace the shaft.
There is excessive bearing-frame
flange runout.
The shaft is bent.
Replace the shaft.
The flange of the bearing frame is dis-
torted.
Replace the bearing-frame
flange.
There is excessive frame-adapter run-
out.
There is corrosion on the frame
adapter.
Replace the frame adapter.
The adapter-to-frame gasket is not
seated properly.
Re-seat the frame adapter and
make sure that the adapter-to-
frame gasket is seated properly.
There is excessive seal chamber or
stuffing-box cover runout.
The seal chamber or the stuffing-box
cover is not properly seated in the
frame adapter.
Re-seat the seal chamber or
stuffing-box cover.
There is corrosion or wear on the seal
chamber or stuffing-box cover.
Replace the seal chamber or
stuffing-box cover.
There is excessive vane-tip runout of
the impeller.
The vane is bent.
Replace the impeller.
7.3 Assembly troubleshooting
90
Model IC, ICI, ICH, ICIH Installation, Operation, and Maintenance Manual