Xylem 8100 Series Centrifugal Pumps AC2515 REV.C - Manual (Page 34)

FIGURE 20 – REMOVING STUFFING BOX
11. Loosen set screws (3-902-3) in shaft nuts
(3-015-9) and then remove shaft nuts
using pin scanner wrench. Remove O-
rings (3-914-9) from counterbore in shaft
sleeves.
NOTE: Both shaft nuts have right handed
threads.
12. To remove the sleeve, hold the shaft
vertically and drop it on a block of wood.
The impeller weight should force both the
impeller and sleeve from the shaft. NOTE:
There is a silicone adhesive/sealant
between the sleeve and the impeller.
13. Remove the other shaft sleeve, nut and
sleeve O-ring as described in steps 11
and 12.
NOTE: For impellers with replaceable rings –
remove the rings (0-004-0), if necessary, by
cutting with a cold chisel (See Figure 21A).
(3-009-9)
SLEEVE
(0-004-0)
IMPELLER RING
(3-003-9)
CASING RING
LOCKING PIN
(3-943-9)
FIGURE 21A – IMPELLER WITH WEAR RINGS
FIGURE 21B – “FLOATING” CASING RING
(10X8X20 AND 12X10X18)
14. Remove the impeller key (3-911-1) from
the shaft.
ASSEMBLY (PUMP WITH PACKING)
All bearings, O-rings, lip seals, gaskets, impeller
rings, and casing wear rings should be replaced
with new parts during assembly. All reusable parts
should be cleaned of all foreign matter before
reassembling. The main casing joint gasket can be
made using the upper or lower half as a template.
Lay the gasket material on the casing joint. Trim
CASING
(2-001-0)
IMPELLER
(4-002-0)
CASING
FLOATING
CASING
RING
IMPELLER
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