Goulds Pumps 3498 - IOM - Manual (Page 25)

ALIGNMENT PROCEDURE
!
Alignment procedures must be followed to prevent
unintended contact of rotating parts. Follow
coupling manufacturer's installation and operation
procedures.
Proper rough alignment must be made during unit setting
and grouting. See previous section.
There are two forms of misalignment between the pump
shaft and the driver shaft as follows:
1. Angular misalignment — shafts have axis concentric
at intersection, but not parallel.
2. Parallel offset misalignment — shafts have axis
parallel, but offset.
The necessary tools for checking alignment are: (1) a straight
edge and a taper gauge or set of feeler gauges or, (2) a dial
indicator with mounting magnet and extension bars.
Check and correct for angular misalignment before correcting
parallel alignment. Final alignment should be made by moving
and shimming the motor on its base until the coupling hubs are
within the recommended tolerances measured in total run out.
All measurements should be taken with the pump and driver
bolts tightened. Final alignment check should be made after
the unit has attained its final operating temperature.
Method 1 - Using straight edge and taper gauges or feelers
(Fig. 9):
Proceed with this method only if satisfied that face and
outside diameters of the coupling halves are square and
concentric with the coupling bores. If this condition does
not exist or elastomeric couplings do not make this method
convenient, use Method 2.
Check for angular alignment by inserting the taper or feeler
gauges between the coupling faces at 90° intervals. The
unit is in angular alignment when these four (4)
measurements are the same, or within recommended
tolerances.
Check for parallel alignment by placing a straight edge
across both coupling rims on all four sides. The unit is in
parallel alignment when the straight edge rests evenly
across both coupling rims in all four (4) positions.
22
3498 IOM 12/04
Fig. 9