Xylem IMDWT R02 Model DWT Deep Well Turbine Pumps - Manual (Page 16)

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2. Clean the surface of the discharge head where the
tension plate will be mounted and remove any nicks
or burrs with a fine flat file. Clean the O.D. of the
tube nipple. Carefully install the tension plate and
gasket (779). Evenly tighten the mounting capscrews
(759F).
3. Pour one pint of recommended oil down the
tube nipple (629). (See pages 19 and 20 for
recommended lubricants.) NOTE: Factory
assembled unit has no oil in it. Oil must be added in
the field.
4. Clean the tension nut (623) and lightly oil its bore
and the threads. Screw the tension nut into the tube
nipple until the flange face of the nut contacts the
tension plate.
5. Tighten the tension nut per the chart on page 14
to the proper amount of tube tension. Back off the
tension nut until a slot aligns with the locking bolt
(636). Install the locking bolt.
For setting less than 100 ft., tighten to the nearest
locking position. Check the “HT” dimension (See
Figure 7), be sure it is correct.
6. Connect the lubrication line (635) to the tension
nut. Fill the container with the recommended oil.
Check the lubricator feed and see that the oil is
flowing freely.
INSTALLING THE drIVEr
INSTALLATION OF A HOLLOW SHAFT DRIVER
This refers to either VHS type electric motors or hollow
shaft type gear drives. A small paragraph will be devoted
to combination electric motor and right angle gear
drives.
Do not work under a heavy suspended
object unless there is a positive support
and safe guards which will protect personnel should a
hoist or sling fail.
1. The driving mechanism of all hollow shaft driver is
shown on Figure 10. The driveshaft (608) extends
up through the quill or hollow shaft of the driver
and is held in place by an adjusting nut (604), which
not only carries all the static and hydraulic thrust
of the impellers and shaft but also provides the
adjustment for the impeller clearances. The head
shaft is connected to top shaft (or stub shaft) by a
threaded coupling or a rigid flange coupling.
2. Motor stand. When a motor stand is furnished and
not installed, proceed as follows:
A. Hoist the motor stand, inspect the mounting
surfaces, register, and clean these surfaces
thoroughly.
B. Install the motor stand on discharge head and
secure with capscrews provided.
3. Attach a sling to the lifting lugs of driver and hoist
the driver up. Inspect the mounting surface, register
and clean these surfaces thoroughly. If any burrs
WARNING
are found, remove burrs with a smooth mill file,
cleaning thoroughly afterward.
4. For motor, orient the motor conduit box in the
required position. For the right angle gear, orient
the input shaft to the desired position. Align the
driver mounting holes with the mating tapped holes
on the discharge head. Lower the driver until the
registers engage and the driver rests on the discharge
head. Secure driver with capscrews provided.
5. Lubricate the driver bearings in accordance with
instructions given on lubrication plate attached to
the driver case (or in the Motor IOM).
Figure 11
6. After lowering and orienting the driver as explained
above, remove the drive coupling and the hold
down bolts (See Figure 10). Be sure to mark the
location of the coupling before remove it.
7. Lower the head shaft through the motor quill shaft
to meet the shaft coupling. Apply a thin film of oil
to head shaft threads (if non-galling material) and
screw into the shaft coupling (located above the
stuffing box). Make sure the shaft is not damaged in
any way. Tighten the joint.
8. Check that the head shaft centers inside the driver
quill shaft within 0.06” (1.5 mm). If it does not,
misalignment is indicated.
9. Any head shaft misalignment with driver quill
shaft could be caused by a bent driveshaft, burrs,
or foreign matter between shaft ends or any of the
mounting flanges: motor flange to discharge head
top flange, discharge head base flange to base plate
or the base plate itself could be out of level. If the
latter, shimming between it and discharge head base,
will correct it. Also, check concentricity of motor to
motor-stand (if provided) to discharge head.
10. With the motor in place and the head shaft
projecting through the motor quill shaft, make
temporary electrical connection to check the motor
rotation. (Be sure to remove the ratchet pins (or
balls) before checking motor rotation.) Motor
must rotate counterclockwise when viewed from
the top. See arrow on pump name plate. If motor
does not rotate counterclockwise, you can change
the rotation by interchanging any two leads. (For
three phase only. For single phase motors see motor
manufacturer’s instructions.)
DRIVESHAFT (608)
CAPSCREW (760)
ADJUSTING NUT
HOLD DOWN
BOLT
(604) ADJUSTING
NUT
(730) GIB KEY
DRIVE
COUPLING