RS – Multi-Stage, I-280
Centrifugal Pump 280 – 16.03.EN
44
bearing cap to bearing frame (99) with bearing
cap bolts (601). Bearing cap bolt O-ring (89W),
and washers (850).
51. Refer to Figure 15 for units that are oil
lube/water cooled or oil lube/air cooled for
proper installation of oil cooler (215A).
52. Use proper gasket shellac in between oil cooler
(215A) and/or gasket (73)/oil pan (215).
53. Repeat steps 34 through 50 for discharge end
of pump.
54. Rotate shaft (6) by hand to insure shaft rotates
freely and no rubbing noises are present.
Tighten gland nuts (615) on seal gland (17A*).
55. Install tubing flush lines.
56. Install plugs (424) for stuffing box, (423) for
gauge connector, and (424) for the casing drain.
CAUTION
Use a hoist with adequate lifting capacity; refer
to Section VII, Paragraph B.
57. Return assembly to installation site. Install pump
on base.
58. Check for soft foot, if needed correct by
shimming or loosen and torque the tie bolts.
Soft foot will cause alignment problems and
may cause failure if not corrected. Secure to
base with capscrews.
59. Rotate shaft (6) by hand to insure shaft rotates
freely and no rubbing noises are present.
60. Install coupling key (46). Install coupling half on
pump shaft (6).
61. Align coupling according to Section VII,
Paragraph F.
62. Reconnect piping, gauge lines, and auxiliary
connections, as necessary. Check for smooth
shaft rotation. Check alignment again. If
different than before, you have pipe strain and
must fix the pipe to eliminate the strain.
63. Reinstall coupling guard.
CAUTION
Pump bearing frames should be filled with
oil before starting the pumping unit. Operation
of the unit without proper lubrication can result
in overheating of the ball bearings, ball bearing
failures, pump seizures and actual breakup of
the equipment, exposing operating personnel to
injury.
64. Fill bearing frame with oil (refer to Section X,
Paragraph A and Table 12.
65. Confirm water is turned on to external flush lines
for pumps equipped with water cooling for either
the oiler or the mechanical seal.
66. Remove all tags from valves and switches.
67. Start pumping unit in accordance with Section
VIII, Paragraph C.
G. REPLACEMENT OF WEAR RING. The pump has
replaceable wear rings (7A, 7B and 7X) inserted into the
diffuser (5A or 5X), suction casing (9), and interstage
casing (111). The clearance between the wear ring and
impeller hub will increase with wear. Internal leakage will
result and pump performance will decrease. The
allowable clearance and method of measurement is
described in Section XI, Paragraph D.
NOTE
Parts marked with * are options that vary by
pumping unit and bearing frame size.
Refer to Section II for Safety precautions before
disassembling pump.
For pumps with hardened metal wear rings the
impellers need replaced if not within the
specified clearance listed in Table 18.
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