Figure 6: Directions of viewing coupling. View from top of pump.
4.
The angular alignment should not be a problem. If, however, .003" (.076mm) T.I.R. or less is not
attainable check the motor and motor mount for perpendicularity to their respective centerlines.
5.
Repeat steps 1-4 substituting position 2 for position 1 and position 4 for position 3. Use the same
marks made on the coupling from positions 1 and be sure to turn the coupling halves together.
Method 2 - Feeler Gauge Method
For the following steps refer to Fig. 4.
1.
Insert a feeler gauge at position 1 at the periphery of the couplings. Mark this position on both
flanges.
2.
Record the largest gauge size which fits snugly between the two flanges.
3.
Rotate both flanges to position 3 - 180°.
4.
Insert a feeler gauge at position 3 at the periphery of the couplings.
5.
Record the largest gauge size which fits snugly between the two flanges.
6.
Calculate the difference between the readings at positions 1 and 3. The difference should not be
greater than .003in. (.076mm). If, however, .003in. (.076mm) T.I.R. or less is not attainable check
the motor and motor mount for perpendicularity to their respective centerlines.
7.
Repeat steps 1-6 substituting positions 2 and 4 for positions 1 and 3 respectively. Use the same
marks made on the coupling from position 1 and be sure to turn the coupling halves together.
Parallel alignment
The unit is in parallel alignment when indicator P (Parallel Indicator) does not vary by more than .003in.
(.076mm) as measured at four points on the coupling periphery 900 apart at operating temperature.
There are two methods outlined below which are acceptable to achieve the desired alignment.
Method 1 - Dial Indicator Method
Tip: Since the coupling halves are
For the following steps, refer to Fig. 4.
1.
Zero indicator P at position 1 of coupling half Y. Mark this position on both flanges.
2.
Rotate both flanges 180° to position 3. Observe needle and record reading.
3.
Negative Reading - The coupling half Y is shifted toward position 1. If the value is greater
than .003in. (.076mm), shift the motor accordingly.
5.1 Installation Instructions-Vertical Pumps
18
Model VJC Installation, Operation, and Maintenance Manual
Summary of Contents for VJC
Page 1: ...Installation Operation and Maintenance Manual Model VJC ...
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