Goulds Pumps 3500XD - IOM - Manual (Page 42)

38
3500XD IOM 8/07
16. Assemble stuffing box cover to frame adapter before
attaching frame adapter to bearing frame with bolts
(370).
17. Bolt frame adapter and stuffing box cover assembly to
bearing frame with (370B) adapter to frame bolts.
18. Install repeller (262) on shaft. Insure shaft sleeve and
repeller o-rings (412F) are in place.
19. Place stuffing box cover-to-casing gasket (351) against
shoulder of stuffing box cover. Small amounts of o-ring
lube may be used on both sides of gasket to seal and
secure gasket in place.
20. Lubricate shaft with never seize or similar substance and
install impeller key (178). Be sure shaft sleeve o-ring
(496C) is in place. Slide impeller (101) on shaft. Install
X-Ducer key (178B). Install X-Ducer (274F) on the
shaft. Install X-Ducer nut (304) with o-ring (412A).
Prevent shaft from rotating and tighten X-Ducer nut
(304) to the following torque values:
· S group: 70 N-m (52 ft-lbs)
· M group: 325 N-m (240 ft-lbs)
· L group: 325 N-m (240 ft-lbs)
s
! WARNING
Insufficient tightening of X-Ducer nut (304) may result
in loosening during operation which may damage pump.
21. Lubricate suction liner o-ring (496A) with a silicone
based o-ring lubricant and install in suction liner o-ring
groove. Also, lubricate the bore in the casing which will
contact with this o-ring. Carefully guide the suction
liner into casing. To facilitate installation, liner should
be placed with the large diameter held off the floor and
the casing lowered over the line. Install and evenly
tighten suction liner nuts (423A). Be sure the jacking
bolts (370L) have been backed off.
22. Tighten casing hold-down bolts.
23. Connect suction and discharge flanges. Care should be
taken to prevent excessive pump flange loading.
24. Slide the completely assembled “back pullout” unit into
the casing. Tighten the frame adapter-to-casing bolts
evenly to assure that the gap between adapter and casing
is even. Check with a feeler gauge at 4 points 90
degrees apart around the adapter.
25. Install pedestal hold-down bolts. Frame pedestal (241)
is not to be flush with baseplate. Clearance of ¼” is
normal. Install shims under pedestal before tightening.
26. Set impeller clearance as outlined in this section.
Overall travel should be .090” to .140” depending on
tolerances. If not, check casing gasket to be sure it is
1/16” thick. If total travel is greater than .250” due to
impeller wear, then impeller should be replaced.
27. Tighten drive collar set screws on cartridge mechanical
seal. Loosen and remove centering tabs.
28. Replace auxiliary piping.
29. Follow procedures outlined in Section 3 - Preparation for
Start-up. NOTE: Pay particular attention to instructions
concerning alignment and lubrication.
s
! WARNING
Before installation or disassembly of the coupling guard
is performed, the driver must be de-energized, the driver
controller/starter put in a locked out position and a
caution tag placed at the controller/starter indicating the
disconnect. Replace coupling guard before resuming
normal operation of the pump or serious physical injury
may occur. Goulds Pumps, Inc. assumes no liability for
avoiding the practice.
s
! WARNING
Before beginning any alignment procedure, make sure
driver power is locked out. Failure to lock out driver
power may result in serious physical injury.
NOTE: Operation of the unit without proper lubrication
will cause bearing failure, and pump seizure.
l
! CAUTION
Use of couplings which have excessive weight can cause
shaft failure and lead to physical injury. Consult pump
manufacturer for recommended weight limits for
couplings should the originally supplied coupling be
changed.
Fig. 25