Permitted Indicator Values For Alignment Checks; Alignment Measurement Guidelines; Attach The Dial Indicators For Alignment - Goulds Pumps 3700 Installation, Operation And Maintenance Manual

When
Periodically

Permitted indicator values for alignment checks

NOTICE:
The specified permitted reading values are valid only at operating temperature. For cold
settings, other values are permitted. The correct tolerances must be used. Failure to do so can
result in misalignment.
IMPORTANT
• For electric motors, the motor shaft initial (cold) parallel vertical alignment setting should
be 0.05 to 0.10 mm | 0.002 to 0.004 in. lower than the pump shaft.
• For other drivers such as turbines and engines, follow the driver manufacturer's
recommendations.
When dial indicators are used to check the final alignment, the pump and drive unit are
correctly aligned when these conditions are true:
• The Total Indicated Reading (T.I.R.) is at 0.05 mm | 0.002 in. or less at operating
temperature.
• The tolerance of the indicator is 0.0127 mm per mm | 0.0005 in. per in. of indicator
separation for the reverse dial indicator or laser method when the pump and driver are at
operating temperature.

Alignment measurement guidelines

Guideline
Rotate the pump coupling half and the driver coupling half
together so that the indicator rods have contact with the same
points on the driver coupling half.
Move or shim only the driver in order to make adjustments.
Make sure that the hold-down bolts for the driver feet are tight
when you take indicator measurements.
Make sure that the hold-down bolts for the driver feet are loose
before you make alignment corrections.
Check the alignment again after any mechanical adjustments. This corrects any misalignments that an

Attach the dial indicators for alignment

You must have two dial indicators in order to complete this procedure.
1. Attach two dial indicators on the pump coupling half (X):
a) Attach one indicator (P) so that the indicator rod comes into contact with the perimeter
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
Manual
Why
This follows the plant operating procedures.
of the driver coupling half (Y).
This indicator is used to measure parallel misalignment.
Explanation
This prevents incorrect measurement.
This prevents strain on the piping instal-
lations.
This keeps the driver stationary since
movement causes incorrect measure-
ment.
This makes it possible to move the driver
when you make alignment corrections.
adjustment may have caused.
Installation
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