Xylem IMDWT R02 Model DWT Deep Well Turbine Pumps - Manual (Page 12)

12
INSTALLING THE 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.
NOTE: 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. 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.
6. 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.
7. 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.
8. Repeat the preceding procedures until all column
sections required have been installed.
9. Install the top shaft or stub shaft and coupling. If
the pump is equipped with column adjusting nipple,
install it with longer threaded end upward. (See
page 13 for adjustment instruction.) Screw the lock
ring on to the nipple until reach to the end of the
thread.
Do not drop any foreign object into the
column assembly. Such an object can
cause serious damage to the pump and any downstream
components. Any foreign object dropped into the column
assembly must be retrieved prior to continuing assembly.
ENCLOSED LINESHAFT
1. Insert tube (654) and shaft (646) sections into
column section.
2. Place an elevator clamp near top of column just
below and butt firmly against column pipe coupling
(645). For flanged columns, place the elevator clamp
just below the flange.
3. Attach a sling to hoist hook. Attach bottom of shaft
(646) to column (644), by tying a tail rope to deep-
throated clamp attached to bottom of column. (See
Figure 6). Tie a clove hitch or double half hitch
around the enclosing tube and then around the shaft
in threaded area. Figure 6 also shows the alternate
method (dotted lines).
4. Utilize the remaining tail rope to keep tension on
the knots during hoisting. Lower end of column
section shall be guided by a drag line which is pulled
by the hoist. A traveling block for the drag-line
shall be attached to a deep-throated clamp, which is
secured to bottom of the column threads.
CAUTION
CAUTION
CAUTION