Goulds Pumps 3640 - IOM - Manual (Page 66)

Maintenance
7. Use a sling in order to pull the shaft out of the pump only as far as the radial end is still
supported by the radial end throat bushing (125).
CAUTION:
Support the thrust end of the shaft before you position the slings to remove the rotor.
8. Reposition the slings around the impellers (101 and 145) on the locknuts (124 and 130).
9. Pull the rotor out of the pump.
10. Remove the casing gaskets (351, 351C, 360W).
11. Remove the radial end impeller locknut (124).
You do not need to remove the thrust locknut (130) from the shaft unless you plan to
replace either the thrust locknut or the shaft.
12. Measure and record the X dimension where indicated in the figure.
This value is required for the correct positioning of the impeller in the casing at reassembly.
The X dimension is pre-set at the factory. Refer to the Impeller setting table.
64 Model 3640 Installation, Operation, and Maintenance Manual