Xylem AC8584C Series HSCS Base Mounted Centrifugal Pumps User Manual
Page 24
2
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(See Appendix “A” for exploded view.)
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1. Close valves on suction and discharge sides of pump. If
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no valves have been installed, it will be necessary to drain
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the system.
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2. Remove the coupler guard. Refer to section titled “Hex
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Coupler Guard Removal/Installation.
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3. Loosen the capscrews which secure the coupler flanges
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to the coupler hubs. Remove the coupler flanges and
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sleeve by compressing the flanges and pulling out from
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beneath the hubs or by loosening the allen set screws and
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sliding the hubs back on the shafts. Remove the coupler
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hub from the pump shaft.
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4. Drain the pump by opening vent plug (0-910-0) and
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remove drain plugs (0-910-0) on suction and discharge
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nozzle.
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5. Remove seal lines (0-901-0, 0-950-0, 0-952-0), if supplied.
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6. Remove gland bolts (3-904-9) and slide gland (3-014-2)
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away from casing.
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7. Remove all casing main joint cap screws (2-904-1) and
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dowels (2-916-9). Use slot in casing main joint and sepa-
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rate the casing halves with a pry bar. Lift upper half casing
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(2-001-7) by cast lugs.
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8. Remove cap screws (1-904-9) which hold bearing
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housings (3-025-2) to the casing and lift rotating element
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out of lower casing (2-001-08). Rotating element may now
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be moved to a suitable working location.
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9. Pull coupling half and key (3-911-2) off shaft (3-007-0).
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NOTE: A spar
e rotating element can be installed at this
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point.
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10. Remove cap screws (3-904-9) from bearing covers (3-018-3,
К
-4).
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11. Remove bearing housings (3-025-2), locknut (3-516-4),
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and lockwasher (3-517-4). Mount bearing puller and
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remove bearings (3-026-2). Remove thrust washer (3-078-9)
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and snap ring (3-915-9).
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NOTE: Locknut, lockwasher
, and thrust washer are not
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used on inboard side.
12. Remove bearing covers (3-018-5, -4) and push oil seals
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(3-177-9) out of bearing covers and coupling and bearing
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housing. Pull deflectors (3-136-9) off shaft.
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13. Remove glands (3-014-2). Loosen set screws and remove
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mechanical seal head assembly (3-402-0). Press mechan
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ical seal seats (3-401-0) from glands.
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14. Remove casing rings (3-003-9) from impellers (4-002-0).
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15. Remove set screw (3-902-9) from shaft nuts. Remove
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shaft nuts (3-015-9), O-rings (3-914-9), sleeves (3-009-9),
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sleeve gaskets (1-428-1), and impeller (4-002-0).
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NOTE: Apply heat uniformly to the shaft sleeve to loosenÊ
the sealant between the shaft and sleeve.
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To further assist in removing the sleeves, hold the shaft
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vertically and drop it on a block of wood. The impeller
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weight should force both the impeller and sleeve from the
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shaft.
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16. Refer to page 26 if pump is equipped with adjustable
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rings.
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NOTE: For impellers with r
eplaceable rings - remove the
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rings (4-004-9) by cutting the rings with a cold chisel. (See
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Figure 20)
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FIGURE 20 – CASING AND IMPELLER RINGS
CAUTION:
DO NOT REUSE THE BALL BEARINGS.
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CAUTION:
DO NOT EXCEED 275ºF
.
К