Xylem 8100 Series Centrifugal Pumps AC2515 REV.C - Manual (Page 39)

WARNING:
Prior to working on pump the power source
should be disconnected with lockout provisions so
power cannot be re-energized to the motor. Close
isolating suction and discharge valves. Failure to
follow these instructions could result in property
damage, severe personal injury, or death.
(See exploded view on page 58.)
1. Drain the pump by opening vent plug (A,
Figure 28) 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).
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 28 – PUMP WITH MECHANICAL
SEALS
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
removed to a suitable location to work on.
NOTE: A spare rotating element can be
installed at this point.
5. Remove four cap screws (3-904-9) from
each bearing housing (3-025-3 and -4)
and remove the bearing 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 puller, remove the bearing (3-026-
4) from the shaft. Remove the inboard end
bearing (3-026-3) in the same manner.
FIGURE 29 – ROTATING ELEMENT
NOTE: Locknut and lockwasher are not used
on inboard end bearing.
CAUTION:
DO NOT REUSE THE BALL BEARINGS.
A
VENT PLUG
B
DRAIN PLUG
C
DRAIN PLUG
FIGURE 30 – REMOVING STUFF BOX
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
30).
8. Remove lip seals (3-177-9) and O-rings
(3-914-1) from the stuffing boxes.
9. Drive both mechanical seal seats (3-401-
0) from both the stuffing boxes.
39