Goulds Pumps 3410 - IOM - Manual (Page 46)

NOTE: Refer to Fig. 38 and 39 at the end of this
chapter for illustrated detail of the following
procedures.
s
! WARNING
Never attempt to lift entire pump using lifting lugs.
9. Remove upper casing using sling and hoist or lift and
lifting lugs. Remove and discard gaskets.
10. Remove screws (372U) from bearing saddle.
11. Place sling on shaft (122). Using suitable hoist or lift,
remove rotating element and place on padded supports.
On units with mechanical seals, care should be taken to
insure the casing rings (103) do not slip and damage the
seals.
12. Mark coupling position on shaft (122) and remove
coupling (see manufacturer’s instructions).
13. Bearing removal.
a. Remove screws (371C). Slide housings (134) off
bearing (168 and 112) and shaft (122). Use care
not to damage oil seal (332).
b. Using snap ring pliers, remove retaining ring (361)
from thrust end of shaft.
$
CAUTION
Never use a hammer to drive shaft through bearings.
Doing so can cause severe shaft and bearing damage.
c. Remove bearings (168 and 112) using bearing
puller. Use care not to damage bearings. If bearing
is to be reinstalled, protect from contamination by
wrapping with a clean cloth or paper.
(S Group only). Use a two-jaw puller on end cover
(109). When pulling bearing, use caution not to
damage end cover.
(M, L, and XL Groups). Use split jaw puller on
back of bearing (168 and 112).
Discard old bearings.
NOTE: Bearing replacement is recommended whenever
bearings are removed from the shaft.
(L and XL Groups). Remove radial bearing spacer
(443T).
d. Remove gaskets (360), bearing end covers (109),
and deflectors (123). Discard gasket.
e. Remove outboard seal (332) from coupling end
bearing housing, and inboard seal (333) from each
end cover (109).
14. If unit has mechanical seals (not shown), slide glands
with stationary seat in place off shaft. Use care to
prevent damage to lapped seal faces. If unit has packed
stuffing boxes, remove nuts (355), gland (107), packing
(106), lantern rings (105), and stuffing box bushings
(125).
15. Slide casing wear ring (103) off impeller and shaft.
16. Remove rotary portion of both seals.
17. Remove shaft sleeves (126):
a. When removing sleeve (126), use very fine emery
cloth to smooth shaft. This prevents binding.
NOTE: Optional shaft sleeve on S group should only be
removed when replacement is required.
b. S Group (sleeve option, Fig. 39). Loosen sleeve
(126) with low heat (350-400°F) (177-222°C) (use
temperature stick, etc. to monitor the temperature),
apply torque with strap wrench, slide sleeve
carefully off shaft.
c. M, L, XL Group (Fig. 38):
• Loosen set screw (222B) on sleeve nut (124).
• Using spanner or strap wrench, unscrew sleeve
nut (124).
• Remove and discard O-rings (497).
• Carefully slide sleeves (126) off shaft.
• Remove and discard sleeve to impeller gasket
(428) located on end of sleeve nearest impeller.
18. Remove impeller.
a. S Group (Fig. 39).
• Using snap ring pliers, remove retaining rings
(361H).
• Drive or press impeller (101) off shaft.
• Remove key (178).
b. M, L, XL Groups
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CAUTION
Do not damage impeller hub surface which is sealed by
sleeve gasket.
• Scribe a mark on the shaft to mark the location
of the impeller hub.
• Drive or press impeller (101) off shaft.
• Remove key (178)
44
3410 IOM 1/2010