Installation
TT Twin-Screw Pump -
Installation, Operation & Maintenance Manual
33
Perform angular alignment for a vertical correction
1. Set the angular alignment indicator to zero at the top-
center position (12 o’clock) of the
driver coupling half.
2. Rotate the angular alignment indicator to the bottom-
center position (6 o’clock).
3. Record the angular alignment indicator reading.
4. Repeat the previous steps until the allowable reading value is achieved.
When the reading
value is...
Then do this.
Negative
The coupling halves are farther apart at the bottom than at the top. To correct
this do one of the following:
• Add shims in order to raise the feet of the driver at the DE.
• Remove shims in order to lower the feet of the driver at the NDE.
Positive
The coupling halves are closer at the bottom than at the top. To correct this do
one of the following:
• Remove shims in order to lower the feet of the driver at the DE.
• Add shims in order to raise the feet of the driver at the NDE.
Figure 6 Example of incorrect vertical alignment (side view)
Perform angular alignment for a horizontal correction
1. Set the angular alignment indicator to zero on left side of the driver coupling half, 90°
from the top-
center position (9 o’clock).
2. Rotate the angular alignment indicator through the top-center position to the right side,
180° from the start position (3 o’clock).
3. Record the indicator reading.
4. Repeat the previous steps until the allowable reading value is achieved.
