Xylem IMVIC R01 Model VIC Vertical Industrial Turbine Can Pumps - Manual (Page 17)

17
COUPLING INSTALLATION: (SEE FIGURES 9 and 10)
1. Check all mating faces with a fine flat file before
installation. Remove all burrs from face.
2. Apply a thin film of oil on the pump key (730) and
insert key into headshaft keyway seat.
3. Gently lower pump hub of coupling (614) onto
headshaft.
4. Thread on the adjusting plate (613) onto the
headshaft until flush with top of the headshaft.
5. Clean driver shaft by removing all grease and burrs.
Try to fit the key on the driver hub (610) before
installing it to the driver shaft.
6. Apply a thin film of oil to the driver key (730) and
insert key into drive shaft keyway seat. Place the
driver hub (610) onto the drive shaft and with key
slide it up the drive shaft until the annular groove
is exposed. Install split ring (722) in the groove and
slide driver hub down over the split ring to capture
it.
Figure 9
7. If the pump is supplied with an adjustable spacer
coupling (see figure 10), install spacer (612) be-
tween head shaft and driveshaft hubs. Secure with
capscrews (759) and hex nuts (735).
IMPELLER ADJUSTMENT
Improper impeller adjustment could cause
contact between the rotating and stationary
parts, resulting in a spark and heat generation.
Impeller adjustment is identical for all motors and
right angle gear drives. Adjustment is accomplished by
turning the adjusting plate (613). (See figure 11 or 12).
The correct adjustment is listed on the Outline Drawing
for the specific unit. If the pump has thrust pot, do not
adjust the impeller position until the thrust has been
installed and adjust the impeller position by using the
adjust nut on the thrust pot.
Figure 10
NOTE: Mechanical seal, when provided, must not be
secured to the shaft prior to impeller adjustment.
(open or enclosed type impellers). Shaft must
move up or down within the seal Assembly.
For pumps handling liquids between –50º to
200º F, impeller adjustment can be made under
ambient conditions. For liquids in excess of
this range, it is recommended that impeller
adjustment be made after the pump surface
temperature has reached an equilibrium when
charged with the pumpage. In those cases, where
this is not feasible due to safety consideration
or impossible due to external ice build up in
cryogenic applications, refer to factory for
specific instructions.
OPEN IMPELLERS
1. With the impellers touching the bottom of the
bowls, turn the adjusting plate (613) towards the
driver hub (610) or spacer (612) obtain 0.015 inch
clearance between the adjusting plate and driver
hub or spacer for the first 10 feet of column. Add
0.010” for each additional 10 feet of column. See
figure 10 or 11. Note: The determination of driver
shaft end play can be critical and should be added
to this setting. For larger pumps over 8”, this
amount may be too little; please refer to Outline
Drawing.