Table of Contents
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Troubleshooting
Alignment troubleshooting
Symptom
Horizontal (side-to-side) alignment cannot The driver feet are bolt-bound.
be obtained (angular or parallel).
Assembly troubleshooting
Table 11: Troubleshooting procedure
Symptom
There is excessive shaft end play.
The runout for the shaft is excessive.
The runout for the bearing-frame flange is
excessive.
The runout for the seal-chamber cover is
excessive.
The runout for the impeller wear ring is
excessive. (not applicable on 3700LF)
102 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Cause
The baseplate is not leveled properly and 1. Determine which corners of the base-
is probably twisted.
Cause
The internal clearance of the bearings is
excessive.
The thrust-bearing end cover is loose.
There are too many shims under the thrust
bearing end cover.
The shaft is bent.
The shaft is bent.
The flange of the bearing frame is distorted. Replace the bearing-frame flange.
The seal-chamber cover is improperly seat- Replace or re-machine the seal-
ed on the frame.
There is corrosion or wear on the seal-
chamber cover.
The shaft is bent.
The wear ring was machined improperly.
Remedy
Loosen the pump's hold-down bolts, and
slide the pump and driver until you
achieve horizontal alignment.
plate are high or low.
2. Remove or add shims at the appropri-
ate corners.
3. Realign the pump and driver.
Remedy
Replace the bearings with a bearing
of the correct type.
Tighten the screws.
Remove the individual shims to ob-
tain the proper thickness.
Replace the shaft.
Replace the shaft.
chamber cover.
Replace the seal-chamber cover.
Replace the shaft.
Replace or re-machine the impeller.
Manual
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Table of Contents
Troubleshooting
