Bell & Gossett P81875G Series HSC-S Centrifugal Pump - Manual (Page 28)

13. Remove the other shaft sleeve and nut as described in
steps 11 and 12.
NOTE: For impellers with replaceable rings – remove the
rings (4-004-9) by cutting the rings with a cold chisel.
14. Remove impeller key (3-911-1).
ASSEMBLY
All bearings, “O” rings, seals and gaskets should be replaced
with new parts during assembly. All reusable parts should be
cleaned of all foreign matter before reassembling. The main
casing joint gasket should be made using the upper half as a
template. Lay the gasket material on the casing joint and mark
it by pressing it against the edges of the casing. Trim the
gasket so that it is flush with the inside edges of the casing.
1. Assemble impeller key (3-911-1) in the shaft keyslot.
2. Check the impeller (4-002-0) and casing to determine the
correct impeller rotation (See Photo 27) and locate the
impeller on the shaft per dimension “A” given in Table on
page 24.
NOTE: For impellers with replaceable rings, heat each
new ring (4-004-9) and slide it onto the impeller. Hold
rings against the impeller shoulder until they cool.
3. Apply 1 / 2 " wide bead of LOCTITE or PERMATEX sealant
to outboard end of shaft – 3" from the impeller hub.
4. Slide sleeve (3-009-9) onto shaft, rotating the sleeve to
evenly distribute the sealant applied in step 3. On pumps
built after 1991, install sleeve O-ring onto the shaft, into
the sleeve counterbore.
IMPORTANT: The pin in sleeve must seat in the impeller
keyslot for proper sleeve alignment.
5. Assemble shaft sleeve nut (3-015-9).
IMPORTANT: Assure that dimension “A” is maintained.
Drill a shallow recess in the shaft through the set screw
hold in the nut. Lock the nut in position with the set screw
(3-902-3).
6. Repeat steps 3 through 5 for the inboard shaft sleeve.
7. Assemble “O” rings (3-914-2) on each casing ring
(3-003-9) and slide ring onto the impeller (See Photo 28).
8. Press a new oil seal (3-177-9) into each stuffing box
(3-073-9).
NOTE: Seal lip must point away from the bearing.
9. Lubricate and roll “O” ring (3-914-1) into the groove in
each stuffing box.
10. Slide each stuffing box onto the shaft, but does not
enter the oil seal. This will permit installation of deflector
(1-136-9).
11. Slide the deflector over the shaft end; then push the shaft
end through the oil seal and slide stuffing box fully onto
the shaft.
12. Heat ball bearing (3-026-4), using either dry heat or a 10
to 15% soluble oil and water solution.
IMPORTANT: Do not exceed 275°F.
13. Using gloves, press the heated bearing onto the shaft
against the shaft shoulder (See Photo 29 on page 28).
14. Install locknut and lockwasher snap ring (3-915-4) on the
outboard end of the shaft.
CAUTION: Extreme Temperature and/or
Flying Debris Hazard
Eye protection and gloves required. Failure to follow these
instructions could result in property damage and/or moder-
ate personal injury.
CAUTION: Extreme Temperature and/or
Flying Debris Hazard
Eye protection and gloves required. Failure to follow these
instructions could result in property damage and/or moder-
ate personal injury.
CAUTION: Extreme Temperature and/or
Flying Debris Hazard
Eye protection and gloves required. Failure to follow these
instructions could result in property damage and/or moder-
ate personal injury.
CAUTION: Extreme Temperature and/or
Flying Debris Hazard
Eye protection and gloves required. Failure to follow these
instructions could result in property damage and/or moder-
ate personal injury.
Photo 28 – Installing Lip Seal
Photo 27 – Drilling Set Screw Recess
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