Xylem IMVIT R01 Model VIT Vertical Industrial Turbine Pumps - Manual (Page 13)

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6. Attach a sling to the elevator clamps, eyebolts,
or lifting bail and hoist it into position over the
foundation opening. (See Figure 7).
7. Carefully lower bowl assembly, guiding the unit so it
does not strike the sides of the opening. Continue
to lower bowl assembly until the elevator clamps
or discharge bowl flange rests firmly on the I-beam
supports.
8. Place a cover over the discharge bowl opening to
prevent entrance of dirt or other foreign matter
until ready for installation of the column assembly.
Do not drop any foreign object into the
bowl assembly. Such an object can cause
serious damage to the pump and any downstream
components. Any foreign object dropped into the bowl
assembly must be retrieved prior to continuing assembly.
COLUMN
OPEN LINESHAFT
Lineshafts are coupled with threaded or keyed couplings.
Column pipe may be threaded or flanged. When
provided, see the Certified Pump Outline Drawing for
the number of column and shaft sections required. The
top and bottom sections may be special lengths:
1. Check the lineshaft (646) for straightness. Average
total runout should be less than 0.0005” TIR per
foot, not to exceed 0.005” T.I.R. for every 10 feet of
shafting.
Bottom section of column pipe should not
be longer than 5 feet.
2. Hoist the first piece of lineshaft over the bowl
assembly. Lower the lineshaft until the bottom end
is properly aligned with the coupling of the pump
shaft. Apply a thin film of oil to the threads on the
lineshaft (646) and the coupling (649) (for non-
galling material, or Molykote if galling material).
Use “MOLYKOTE” Dow Corning or
equal for all galling material such as
316 stainless steel.
3a. With lineshaft in the proper position on the
coupling, screw lineshaft into the coupling manually
until resistance is felt. A fine wire inserted in the
hole at the center of the coupling can be used as a
gage to determine when the coupling is correctly
positioned on the shaft. Remove the wire after
installing the shaft. Completely tighten the joint
by using a pair of pipe wrenches. Use care not to
damage any bearing journal areas on the shaft.
NOTE: Shaft threads are left-handed.
Make up threaded joints manually to
verify that the threads are properly
engaged prior to applying a wrench. If cross-threading
occurs, break the joint and repair the threads. If the
threads are beyond repair, replace the damaged part.
3b. With a keyed coupling
insert the key into the
pump shaft. Lower the
sleeve over the pump shaft,
to approximately 1.0 in
(25.4 mm) below the top
of the shaft. Then lower
the lineshaft until it touches
the pump shaft. Insert the
split ring into the grooves
of the pump shaft and
lineshaft. Raise the sleeve
until it covers the split ring,
then insert the key into the
lineshaft. Raise the sleeve to the top of the key and
secure the sleeve to the split ring with a lock screw
and lock wire.
4. For threaded column, secure a friction clamp
immediately below the column coupling. Hoist
column section over bowl assembly. Lower
column over lineshaft until column pipe engages
the discharge bowl. Manually screw the column
into discharge bowl. Complete joint by tightening
column with chain tongs until the end of the column
butts firmly against discharge bowl.
5. For flanged column, install two eyebolts
diametrically opposite the upper flange of the
bottom column. Attach a sling to the eyebolts and
to the hoist hook. Lower column section until the
flange engages the flanged top bowl register. Insert
as many bolts through both flanges as possible. Lift
column assembly high enough to allow rotation
of the supports. Install and tighten remaining
capscrews gradually in diametrically opposite pairs
until all are uniformly tightened.
6. Lift the assembly and remove the elevator clamp
or supports and slowly lower the bowl and the
column assembly. Place supports on the base plate
and continue to lower the assembly until the column
elevator clamps or column flange comes to rest on
the supports. Place an elevator clamp under the
column pipe and allow it to butt firmly against the
column pipe coupling.
7. Place the bearing retainer over the shaft and locate
it in the column coupling recess. Make sure the
end faces of the column pipe are clean. For flanged
columns, fit the retainer in the female register of the
flange. Make sure the contact faces in the flanges are
clean.
8. Check that the shaft is approximately centered in
the bearing. Move the shaft around slightly so as to
center it in its bearing. Only a slight amount of force
should be required. If an excessive amount of force
is required, the pipe or shaft may not be butted
properly or the shaft may be bent. In any case, the
problem must be corrected prior to proceeding
further.
9. Repeat the preceding procedures until all column
sections required have been installed.
CAUTION
CAUTION
CAUTION
CAUTION