Goulds Pumps 3408 - IOM - Manual (Page 57)

3408 IOM 03/99
51
16. 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.
NOTE: Compress the seal spring only as far as
required to install bearings.
17. 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.
18. Using gloves, slide the heated bearing onto the
shaft against the shaft shoulder (See Fig. 48).
19. 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.
20. 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.
21. 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)
22. Repeat steps 14 through 18, 20 and 21 for the
inboard end.
NOTE: A locknut and lockwasher are not
installed on the inboard end of the shaft.
23. Clean the gasket surfaces of the casing. Apply
Scotch 3M-77 spray adhesive or equivalent to the
lower half of the casing.
24. Within one minute of spraying, set the untrimmed
gasket (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.
25. Trim the gaskets flush with the lower casing
bores, if this has not been done as yet.
▲
! CAUTION
Machined casing bores must remain sharp at
the casing parting line. Gaskets must be flush
with bore in order to contact O-rings. Leakage
can result around stuff box O-ring if this step is
not properly followed.
26. Set the rotating element (Fig. 49) in the pump
casing (2-001-0), assuring correct rotation. Locate
both stuffing box tongues in their respective
casing grooves. Locate pins (3-943-9) in the
stuffing box and the casing wear rings in their
respective slots at the casing parting surface.
Correct any O-ring bulging. (See Fig. 50)
Fig. 48
Fig. 49
Fig. 50
6