Goulds Pumps 3408 - IOM - Manual (Page 44)

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3408 IOM 03/99
8. Lubricate and roll an O-ring (3-914-2) into the
groove in each casing ring (3-003-9) and slide the
casing rings over the impeller (See Fig. 23).
NOTE: 8 x 10-20 and 10 x 12-18 utilize
“Floating” Casing Ring Design. Each ring
requires 2 O-rings. (See Fig. 21B).
9. Press a new lip seal (3-177-9) into each stuffing
box. Before installing the seal, lubricate the lip
seal with a lightweight oil.
NOTE: Lip seals should seat against machined
shoulder in bracket.
NOTE: Seal lip should point away from the
bearings (3-026-3 and -4), if the bearings are
grease lubricated, and towards the bearings, if
the bearings are oil lubricated. (See Fig. 24)
10. Lubricate and roll O-ring (3-914-1) into the groove
in each stuffing box.
11. Slide outboard stuff box onto the shaft so that the
shaft end extends through the packing area, but
does not enter the lip seal. This will permit
installation of deflector (3-136-9).
12. Slide the deflector over the shaft end; then
carefully push the shaft end through the lip seal
and slide stuffing box fully onto the shaft.
13. Heat the ball bearing (3-026-4), using either dry
heat or a 10-15% soluble oil and water solution.
▲
! CAUTION
Do not exceed 275° F.
14. Using gloves, slide the heated bearing onto the
shaft against the shaft shoulder (See Fig. 25).
15. Install lockwasher (3-517-4) and locknut (3-516-4)
on the outboard end of the shaft. Make certain
locknut is secured and then bend over tabs on
lockwasher.
16. Allow the bearing to cool to room temperature. On
grease lubricated bearings only, coat the exposed
sides with two or three ounces of recommended
grease.
17. On grease lubricated bearings, coat the inside of
the bearing housing (3-025-4) with grease and
slide into place over bearing. Attaching the
bearing housing to the stuffing box with four cap
screws (3-904-9).
18. Repeat steps 11 through 14, 16, and 17 for the
inboard end.
NOTE: A locknut and lockwasher are not
installed on the inboard end of the shaft.
19. Clean the gasket surfaces of the casing. Apply
Scotch 3M-77 spray adhesive or equivalent to the
lower half of the casing.
20. Within one minute of spraying, set the untrimmed
gaskets (2-123-5 and -6) in place on the lower
half casing, align the holes in the gaskets with the
holes in the casing and press the gaskets firmly
against the lower half casing face in the area
coated by the adhesive.
21. Trim the gaskets flush with the lower casing
bores, if this has not been done as yet.
Fig. 23
Fig. 24
Fig. 25