Xylem 9100 Series Base Mounted Centrifugal Fire Pumps AC8585 REV.C - Manual (Page 29)

CAUTION: Extreme Temperature Hazard
Allow pump temperatures to reach
acceptable levels before proceeding. Open drain
valve, do not proceed until liquid stops coming out
of drain valve. If liquid does not stop flowing from
drain valve, isolation valves are not sealing and
should be repaired before proceeding. After liquid
stops flowing from drain valve, leave valve open
and continue. Remove the drain plug located on
the bottom of the pump housing. Do not reinstall
plug or close drain valve until reassembly is
completed. Failure to follow these instructions
could result in property damage and/or moderate
personal injury.
29
(See Appendix “A” for exploded view.)
1. Close valves on suction and discharge
sides of pump. If no valves have been
installed, it will be necessary to drain the
system.
2. Remove the coupler guard. Refer to
section titled “Hex Coupler Guard
Removal/Installation.”
3. Loosen the capscrews which secure the
coupler flanges to the coupler hubs.
Remove the coupler flanges and sleeve
by compressing the flanges and pulling
out from beneath the hubs back on the
shafts. Remove the coupler hub from the
pump shaft.
4. Drain the pump by opening vent plug (0-
910-0) and remove drain plugs (0-910-0)
on suction and discharge nozzle.
5. Remove seal line (0-910-0, 0-950-0, 0-
952-0), if supplied.
6. Remove gland bolts (3-904-9), washers
(1-909-9) and slide gland (3-014-2) away
from casing.
7. Remove all casing main joint cap screws
(2-904-1) and dowels (2-916-9). Use slot
in casing main joint and separate the
casing halves with a pry bar. Lift upper
half casing (2-001-7) by cast lugs.
8. Remove packing (1-924-9) and seal cage
(1-013-2) from each stuffing box.
9. Remove cap screws (1-904-9) which hold
bearing housings (3-025-2) to the casing
and lift rotating element out of lower
casing (2-001-08). Rotating element may
now be moved to a suitable working
location.
10. Pull coupling half and key (3-911-2) off
shaft (3-007-0).
NOTE: A spare rotating element can be
installed at this point.
11. Remove cap screws (3-904-9) from
bearing covers (3-01803, -4).
12. Remove bearing housings (3-025-2),
locknut (3-516-4), and lockwasher (3-517-
4). Mount bearing puller and remove
bearings (3-026-2). Remove thrust washer
(3-078-9) and snap ring (3-915-9).
NOTE: Locknut, lockwasher, and thrust
washer are not used on inboard bearing.
13. Remove bearing covers (3-018-3, -4) and
push bearing isolators (1-333-1) out of
bearing covers and coupling end bearing
housing (1-332-1, 1-333-1).
CAUTION:
DO NOT REUSE THE BALL BEARINGS.
FIGURE 13 - COMPLETE ROTATING ELEMENT
LESS PACKING AND GLAND
14. Remove casing rings (3-003-9) from
impeller (4-002-0).
15. Remove set screw (3-902-9) from shaft
nuts. Remove shaft nuts (3-015-9), O-
rings (3-914-9), sleeves (3-009-9) sleeve
gaskets (1-428-1) and impeller (4-002-0).
NOTE: Apply heat uniformly to the shaft
sleeve to loosen the sealant between the
shaft and sleeve. DO NOT HEAT ABOVE
275ºF. To further assist in removing the
sleeves, 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.