When the
reading val-
ue is...
Then...
Positive
The coupling halves are closer at the bottom than at the top. Perform one of these
steps:
•
Remove shims in order to lower the feet of the driver at the shaft end.
•
Add shims in order to raise the feet of the driver at the other end.
X Y
Shims
Figure 14: Side view of an incorrect vertical alignment
4.
Repeat the previous steps until the permitted reading value is achieved.
4.4.5.2 Perform angular alignment for a horizontal correction
1.
Set the angular alignment indicator (A) to zero on left side of the driver coupling half (Y), 90°
from the top-center position (9 o’clock).
2.
Rotate the indicator through the top-center position to the right side, 180° from the start position
(3 o’clock).
3.
Record the indicator reading.
When the reading value is...
Then...
Negative
The coupling halves are farther apart on the right side
than the left. Perform one of these steps:
•
Slide the shaft end of the driver to the left.
•
Slide the opposite end to the right.
Positive
The coupling halves are closer together on the right side
than the left. Perform one of these steps:
•
Slide the shaft end of the driver to the right.
•
Slide the opposite end to the left.
Y X
Figure 15: Top view of an incorrect horizontal alignment
4.
Repeat the previous steps until the permitted reading value is achieved.
4.4.5.3 Perform parallel alignment for a vertical correction
Refer to the alignment table in "Permitted indicator values for alignment checks" (see Table of Con-
tents for location of table) for the proper cold alignment value based on the motor temperature rise
and the pump operating temperature.
Before you start this procedure, make sure that the dial indicators are correctly set up.
A unit is in parallel alignment when the parallel indicator (P) does not vary by more than 0.05 mm |
0.002 in. as measured at four points 90° apart at the operating temperature.
4.4 Pump-to-driver alignment
32
Model IC, ICI, ICH, ICIH Installation, Operation, and Maintenance Manual
