WARNING:
Only trained personnel should do lifting. Pumps and motors often have integral lifting eyes or
eye bolts. These are intended for use in lifting the individual pieces of equipment only. Failure
to properly lift equipment could result in serious physical injury or damage to equipment.
3.
Remove all auxiliary tubing and piping.
4.
Flush the pump to remove corrosive or toxic pumpage if required.
5.
Drain liquid from standpipe.
6.
Disconnect coupling and remove coupling spacer (refer to coupling instructions).
7.
Drain oil.
8.
If unit has stuffing box packing, remove the gland stud nuts. The gland is in two halves and can be
removed.
CAUTION:
Never remove the back pull-out assembly unassisted, physical injury can occur.
To remove the back pullout assembly, proceed as follows:
WARNING:
Pump components can be heavy. Proper methods of lifting must be employed to avoid physical
injury and/or equipment damage. Steel toed shoes must be worn at all times.
9.
Place chain or sling from crane or hoist through frame adapter (108).
10. Remove frame foot hold-down bolts.
11. Remove bolts (370) which hold frame adapter to casing.
12. Adjust sling tension to support back pullout assembly.
13. Slide the back pullout assembly from the casing. The Model 3500XD has jacking bolts (418) to as-
sist disassembly. Screw the jacking bolts into the tapped holes in the frame adapter. Tighten bolts
evenly, a flat at a time, to jack back pullout assembly from casing.
If working space is available to the side of the baseplate, the "pullout assembly" can be turned per-
pendicular to the baseplate. Replace one pedestal hold-down bold in baseplate and support the
bearing frame flange with blocks. Complete disassembly of the “pullout assembly” can be accom-
plished on the job site. If preferred, it can be removed to an available work area.
14. Remove casing gasket (351).
NOTICE:
Ensure that casing gasket is not damaged.
15. Secure shaft from rotating at the coupling end and loosen and remove the X-Ducer nut (304). Do
not lose or damage the X-Ducer o-ring (412A).
Remove the X-Ducer (274F) from the shaft. Careful prying may be necessary. Remove key (178B).
Remove the impeller (101) by carefully prying at the back side at 2 points 180 degrees apart.
16. Remove impeller key (178) from the shaft.
Do not lose or damage the shaft o-rings (496B and 496C).
17. Remove the repeller (262). Do not lose or damage the shaft o-rings (412F).
18. If unit has a mechanical seal, remove gland stud nuts. The gland is a solid ring and cannot be re-
moved after unbolting. Carefully slide the gland off the gland studs and move back on shaft and
shaft sleeve. Avoid contact with exposed lapped seal faces and keep them clean.
6.3 Disassembly
3500XD Installation, Operation and Maintenance Instructions
37
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