The impeller nut has left-hand threads.
4.
Tighten the set screw in the end of the impeller nut.
5.
Verify that the shaft turns freely.
If you notice any rubbing or excessive drag, then determine the cause and correct it.
It is recommended that you repeat the runout checks on the impeller wear-ring surface as described in
Replace the wear rings.
6.6.6 Install the coupling hub
CAUTION:
Wear insulated gloves to handle the coupling hub. The coupling hub will get hot and can cause
physical injury.
NOTICE:
If it is necessary to heat the coupling hub due to an interference fit, do not use a torch. Use a
heating device such as an oven which uniformly heats the coupling hub.
1.
Install the key and pump-half coupling hub on the shaft.
2.
Make sure that the hub is flush with the end of the shaft or to the mark scribed during disassembly.
Refer to coupling manufacturer’s instructions for assistance.
Figure 77: Coupling hub installation
6.6.7 Install the back pull-out assembly in the casing
1.
Install a new casing gasket on the gasket surface of the casing.
You can apply anti-galling compound to the casing fits to aid in assembly and disassembly.
2.
Replace the back pull-out assembly in the casing using a lifting sling through the bearing frame or
other suitable means.
6.6 Reassembly
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