Maintenance
NOTICE:
• Make sure that all parts and threads are clean and that you have followed all directions
under the Preassembly inspections section.
•
Check for magnetism on the pump shaft and demagnetize the shaft if there is any
detectable magnetism. Magnetism attracts ferritic objects to the impeller, seal, and
bearings which can result in excessive heat generation, sparks, and premature failure.
1. Assemble the impeller onto the shaft. The impeller is a slip fit onto the shaft (H7/g6 ISO fit).
Center the impeller between the impeller locknut threads. Apply a liberal amount of an anti-
seize compound onto the shaft.
2. Assemble the impeller locknuts.
One locknut has a right-hand thread, the other one has a left-hand thread.
If this is a repair, it is likely that only one locknut was removed. Keep the second locknut on
the shaft in order to maintain the impeller centering. Use the previously recorded dimension
from the bearing shoulder to the face of the impeller hub, or refer to the Impeller setting
table in the Disassembly section.
NOTICE:
Make sure the threads are clean. Deburr if necessary. Apply an anti-seize compound to the
threads.
3. Install the impeller wear rings .
See Replace the wear rings in the Preassembly inspections section.
4. Measure the TIR on the impeller wear rings, impeller locknuts, and bearing fits.
The shaft is the datum point. Measure the runout of wear rings and impeller nuts to the
shaft with a dial indicator.
Model 3610, API Type BB1 API 610 11th Edition Installation, Operation, and Maintenance Manual
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