Xylem 8100 Series Centrifugal Pumps AC2515 REV.C - Manual (Page 33)

A. DISMANTLING (PUMP WITH PACKING)
WARNING: Unexpected Start-up Hazard
Disconnect and lock out power before
servicing. Failure to follow these instructions could
result in serious personal injury or death, or
property damage.
WARNING: Electrical Shock Hazard
Electrical connections to be made by a
qualified electrician in accordance with all
applicable codes, ordinances, and good practices.
Failure to follow these instructions could result in
serious personal injury or death, or property
damage.
(See exploded view on page 57.)
1. Drain the pump by opening vent plug (A,
Figure 18) and remove drain plugs (B and
C) on the suction and discharge nozzles.
2. Remove all casing main joint cap screws
(2-904-1) and dowels (2-916-1). Remove
external tubing (0-952-0) if supplied.
3. Insert a screwdriver or pry bar into the
slots between the upper and lower casing
halves, and separate the halves, lifting off
the upper casing half. (NOTE: Some
casings have jacking screws.)
FIGURE 18 – PUMP WITH PACKING
4. Tap the stuffing boxes with a soft-headed
hammer to break the seal between the
stuffing box and lower casing half, and lift
the rotating element out of the lower
casing. Rotating element may now be
moved to a suitable working location (See
Figure 19).
NOTE: A spare rotating element can be
installed at this point.
FIGURE 19 – ROTATING ELEMENT
(PACKING INSTALLED)
5. Remove four cap screws (3-904-9) from
each bearing housing (3-025-3 and -4)
and remove the bearings housings from
the shaft (3-007-0).
6. Bend back lockwasher tab and remove
locknut (3-516-4) and lockwasher (3-517-
4) from the outboard end of the shaft and,
using a bearing or gear puller, remove the
bearing (3-026-4) from the shaft. Remove
the inboard end bearing (3-026-3) in the
same manner.
NOTE: Locknut and lockwasher are not used
on inboard end bearing.
CAUTION:
DO NOT REUSE THE BALL BEARINGS.
7. Slide both stuffing boxes (3-073-9) off of
the shaft, working deflector rings (3-136-9)
off the shaft at the same time (See Figure
20).
8. Remove lip seals (3-177-9) from the
stuffing boxes.
9. Remove the two gland bolts (1-904-9),
gland halves (1-014-9), packing (1-924-9)
and, if supplied, seal cage (1-013-9) from
each stuffing box. Remove the O-rings (3-
914-1) from the stuffing boxes.
10. Remove the two casing rings (3-003-9)
from the impeller (4-002-0) and remove O-
rings (3-914-2) from each casing ring.
NOTE: Each casing ring on 10x8x20 and
12x10x18 has 2 O-rings (See Figure 21B p.
24).
A
VENT PLUG
B
DRAIN PLUG
C
DRAIN PLUG
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