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

Installation

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. You must use the correct tolerances. Failure to do so can
result in misalignment and reduced pump reliability.
IMPORTANT
• For electric motors, the motor shaft initial (cold) parallel vertical alignment setting should
• For other drivers such as turbines and engines, follow the driver manufacturer's
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 indicator runout is a maximum of 0.002 in. (0.05 mm) at operating temperature.
• The tolerance of the indicator is 0.0005 in./in. (0.0127 mm/mm) of indicator separation at

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 measure-
ments.
Make sure that the hold-down bolts for the driver
feet are loose before you make alignment correc-
tions.
Check the alignment again after any mechanical
adjustments.

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
b) Attach the other indicator (A) so that the indicator rod comes into contact with the inner
24 Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance
be 0.002 to 0.004 in. (0.05 to 0.10 mm) lower than the pump shaft.
recommendations.
operating temperature.
of the driver coupling half (Y).
This indicator is used to measure parallel misalignment.
end of the driver coupling half.
This indicator is used to measure angular misalignment.
Explanation
This prevents incorrect measurement.
This prevents strain on the piping installations.
This keeps the driver stationary since movement
causes incorrect measurement.
This makes it possible to move the driver when you
make alignment corrections.
This corrects any misalignments that an adjustment
may have caused.
Manual