Xylem IMDWT R02 Model DWT Deep Well Turbine Pumps - Manual (Page 13)

13
Figure 7
5. Hoist column section over pump, keeping tension
on tail rope. With column in a vertical position,
remove drag-line and traveling block, lower column
until bottom line shaft is properly aligned with
pump shaft coupling.
6. 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.
7. With lineshaft in proper position on the coupling,
remove tail rope and screw lineshaft into coupling
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. Complete tightening the joint
by using a pair of pipe wrenches. Use care not to
damage any bearing journal areas of 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.
8. Carefully lower column section until lower end
of the tube section rests on the adapter bearing
(668). The end faces of the tube should be clean
and free of nicks. Remove tail rope, clean outside
of the adapter bearing and lubricate with thread
compound. Screw tube section onto adapter bushing
manually, until resistance is felt. Complete tube joint
by utilizing a pair of pipe wrenches or chain tongs,
butting the end of tube against the upper end of the
tube adapter bearing.
9. Clean column threads and lubricate with thread
compound.
10. Lower column until column pipe engages in the
discharge bowl. Manually thread the column into
discharge bowl. Complete joint by tightening
column, utilizing chain tongs until the end of the
column butts firmly against discharge bowl.
11. Lift the pump assembly and remove elevator clamp
secured to discharge bowl. Slowly lower assembly
into well or sump until elevator clamp gently comes
to rest on timbers or I-beam supports and remove
the sling.
12. Remove the exposed lineshaft bearing, pour oil into
the tubing and reinstall the bearing. The amount of
oil to be poured is given in the following table:
Tube Size Amount of oil per section
10 ft. Sections 20 ft. Sections
1¼, 1½, 2 ½ Cup 1 Cup
2½, 3, 3½ 1 Cup ½ Qt.
4 and larger ½ Qt. 1 Qt.
See pages 19-20 for recommended oil.
13. Repeat the preceding procedures. Throughout
the column assembly, install tube stabilizer (658)
over the enclosing tube (654) every 40 ft. The last
one should be less than 40 ft below the discharge
head. Use soapy water as lubricant when sliding the
stabilizer over the tube.
14. Continue the procedure until all column sections
for the proper setting have been installed, excluding
the column adjusting nipple (631) and tube nipple
(629), if provided.
15. Install the top shaft or stub shaft and coupling. If
pump is equipped with column adjusting nipple and
tube nipple, install them with longer threaded end
upward. Screw the lock ring (639) on to the column
nipple until the end of thread. (See page 13 for
adjustment instruction.)
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.
INSTALLING THE dISCHArGE HEAd
DWT Pumps are provided with either a cast iron or fab
steel type head. Install the discharge head as follows:
1. If the stuffing box (See Figure 8) or tension nut (See
Figure 9) is assembled to the head, remove it and all
the attached piping.
2. For threaded column, check to be sure that the
flanged column (637) is securely attached to the
bottom of the discharge head. Check and tighten
the capscrews (or socket head screw) gradually in
diametrically opposite pairs.
DEEP THROATED CLAMP
DRAG LINE
COLUMN
ENCLOSING
TUBE
CHAIN WRENCH
(CLAMP)
HOIST
HOOK
ROPE
CAUTION
CAUTION
CAUTION