Goulds Pumps JC Installation, Operation And Maintenance Instructions page 11

Installation
Figure 6: Checking angular alignment
A check for parallel alignment is made by placing a straight edge across both coupling rims at
the top, bottom, and at both sides. The unit will be in parallel alignment when the straight edge
rests evenly on the coupling rim at all positions. Allowance may be necessary for temperature
changes and for coupling halves that are not of the same outside diameter.
NOTICE: Care must be taken to have the straight edge parallel to the axis of the shafts
Checking parallel alignment.
Figure 7: Checking parallel alignment
Angular and parallel misalignment are corrected by means of shims under the motor mounting
feet. After each change, it is necessary to recheck the alignment of the coupling halves.
Adjustment in one direction may disturb adjustments already made in another direction. It
should not be necessary to adjust the shims under the pump.
The permissible amount of misalignment will vary with the type of pump and driver. The
manufacturer's recommendations should be obtained and followed.
When the driver is to be mounted on the subbase in the field, it is necessary to place the
subbase with pump on the foundation to level the pump shaft, to check the coupling faces, the
suction and discharge flanges for horizontal or vertical position, and to make any necessary
corrective adjustments.
When the units are lined up cold, it may be necessary to make an allowance for the vertical rise
of the driver and/or pump caused by heating. Goulds Pumps recommendations should be
obtained and followed.
Model JC Installation, Operation and Maintenance Instructions 9