Pulsafeeder Isochem RGT IOM - Manual (Page 25)

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6.5.4 Reassembling the No. 12 Pump
Trial fit new magnet assemblies and impellers on the assorted shafts prior to final
assembly. The magnet assembly and impeller must be free to move longitudinally along
the shaft between the retaining rings. Sharp edges especially around key ways may
require hand dressing with a fine file so that this free movement is achieved.
1. If the motor has been removed or replaced, position it on its mounting bracket and tighten.
2. Position the spool (item 29) so that access to the guard screw hole is provided (refer to
Appendix B) and install and tighten the four (4) motor bolts (items 23).
3. Coat the motor shaft with a small amount of anti-seize compound.
4. Slide the drive magnet assembly onto the motor shaft.
5. Align the keyways in the motor shaft and the drive magnet assembly.
6. Slide the shaft key onto the shaft/drive magnet assembly. Position it axially so that the end of
the motor shaft is exactly flush with the face of the drive magnet assembly.
7. Position the casing (item 20) on the spool (item 29).
8. Install and tighten the casing bolts (items 35) to 72 in. –lb (810 N-cm).
9. Rotate the drive magnet assembly by hand, to verify free movement.
If any clearance problem is noted, position the drive magnet assembly accordingly.
10. Coat the set screw with removable thread locking compound.
11. Start the set screw (item 24) in the drive magnet assembly (item 21).
12. Tighten the set screw through a hole in the spool (item 29) to 35 in.-lb (400 N-cm). The
screw socket fits a 1/8” Allen wrench.
Because of the distortion usually applied during removal, all retaining rings should be
replaced for reassembly.
Figure 7