Figure 29: Gaskets
14. Install and position coupling hub at scribe mark on shaft.
15. Slide shaft sleeve with cartridge mechanical seal in place on the shaft.
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 ro-
tating and tighten X-Ducer nut
21. 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)
NOTICE:
Insufficient tightening of X-Ducer nut (304) may result in loosening during operation which may
damage pump
1.
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. Care-
fully 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.
2.
Tighten casing hold-down bolts.
3.
Connect suction and discharge flanges. Care should be taken to prevent excessive pump flange
loading.
4.
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.
5.
Install pedestal hold-down bolts. Frame pedestal (241) is not to be flush with baseplate. Clear-
ance of ¼" is normal. Install shims under pedestal before tightening.
6.
Set impeller clearance as outlined in this section. Overall travel should be .090" to .140" depend-
ing 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.
6.5 Reassembly of pump
46
3500XD Installation, Operation and Maintenance Instructions
