Xylem 8100 Series Centrifugal Pumps AC2515 REV.C - Manual (Page 51)

FIGURE 56 – UPPER HALF REMOVAL
11. Rotating element is now ready for
inspection or removal. If element is
inspected and does not need to be
removed then refer to upper half
reassembly procedures.
Rotating Element Removal:
12. For these procedures it will be necessary
to remove the line shafting or motor. Then
remove the pump half coupling.
13. Thread a long bolt, washer and nut
through the hole at the end of the shaft
(See Figure 57).
FIGURE 57 – BOLT, NUT AND WASHER
ASSEMBLY
14. Sling around eye bolt, putting slight
amount of tension on sling.
15. Remove restraining straps if rotating
element is not securely fastened to casing
lower half.
16. Lightly tapping on inboard and outboard
bearing housings, slide rotating element
away from lower half.
17. Lower rotating element to ground by
sliding outboard bearing housing away
from pedestal enabling element to be set
on floor with shaft in an horizontal position
(See Figure 58).
FIGURE 58 – LOWER ROTATING ELEMENT
LOWER
Rotate
Main Joint Flange
SLIDE
ROTATE
18. Rotating element can now be serviced
following disassembly procedure given
previously in this manual.
Reassembly of Rotating Element:
19. Inspect main joint gasket and replace if
necessary. (Follow replacement
instructions in disassembly procedures
section.)
20. Sling around the bolt in end of pump shaft.
21. On full pedestals, the lifting sling must
come through hole in top plate of pedestal
(See Figure 58).
COUPLING END OF SHAFT
DRILLED THRU FOR A LONG
BOLT WITH NUT & WASHER
22. When rotating element is off the ground
and in the vertical position, align any anti-
rotation pins in the casing rings and
stuffing boxes for proper orientation in the
slots in the casing lower half.
23. Moving element towards casing lower half,
engage the stuffing box tongue first.
24. As the stuffing box tongue begins to go
into the respective casing fit, raise the
inboard bearing housing into its respective
fit.
25. When the stuffing box tongues are firmly
seated in their respective fits and all the
anti-rotation pins are seated in their slots,
restrain the rotating element to the lower
half.
Replacing Upper Casing Half:
26. Sling around lifting ears and with
stabilizing rod installed, pick casing upper
half off the ground and rotate top half so
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