Goulds Pumps 3409 - IOM - Manual (Page 44)

20. Clean the gasket surfaces of the casing. Apply Scotch
3M-77 spray adhesive or equivalent to the lower half of the
casing.
21. Within one minute of spraying, set the gaskets
(351D & 351S) 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.
22. Lower upper half casing (100) into place (See
Fig. 20) and locate using the taper dowels (469G) and
install casing main joint bolts (426 & 426A). The casing
joint bolts should be tightened to the following torques: 300
ft-lb minimum for .75"-10 Ferry Cap Countr-bor screws
(Grade 8), 400 ft-lb minimum for 1.0"-8 Ferry Cap
Countr-bor screws (Grade 8). Bolt torquing pattern is
shown in Fig. 39. The number of casing bolts varies with
the size of the pump. (See Fig. 16) Before tightening bolts,
be sure taper dowels are seated properly in reamed holes.
NOTE: Torquing bolts to proper values in proper
sequence is essential in obtaining proper gasket
compression so no leakage can occur at main joint.
$
CAUTION
Double check rotation of pump before installing the upper
half casing. (Refer to Fig. 15)
23. Rotate shaft by hand to assure that it turns smoothly and is
free from rubbing and binding.
24. Cut full rings of 5/8 inch square packing so that ends butt,
leaving no gap between packing and casing. Install three rings
of packing (106) and tap fully to bottom of both stuffing boxes
(See Fig. 21). Stagger joints of each ring of packing at least
90°. Install seal cage (105) (if this optional part was supplied)
and be sure that it will line up with seal water inlet when
packing is compressed. Install remaining two rings of packing
(three rings if no seal cage present) with joints staggered.
Assemble glands (107) square with stuffing box and pull up
tight. Then loosen gland bolts (353B) to permit packing to
expand, and retighten finger tight. Final adjustment of gland
bolts must be done when pump is running. Allow 30 minutes
between adjustments (See Fig. 22).
25. If supplied, assemble seal water lines (102) to stuffing box
and casing. Seal water lines should be piped to the tapped
holes nearest impeller (See Fig. 16).
26. Check coupling alignment and redowel if necessary.
44
3409 IOM 11/04
Fig. 21
Fig. 22
Fig. 20