Page 171 - Know and Understand Centrifugal Pumps

Know and Understand Centrifugal Pumps

separation dimension between the coupling halves. You'll need a
machinist rule and thickness gauge or feeler gauge to perform a rough
alignment.

Before starting the alignment procedure, disconnect the coupling
halves. First, veri@ the rough angular alignment inserting feeler gauges
at four points (90") around the faces between the halves. The
alignment is correct when the feeler gauge distance is the same at all
measured points.
The rough parallel alignment is done by placing the machinist rule
across both coupling rim surfaces in the upper position, lower position,
and both lateral points. The parallel rough alignment is correct when
the straight edge rests uniformly on both rims at all four positions. Be
sure that the coupling rims are concentric with the pump and motor
shafts.

Don't start the pump until after completing all the previously
mentioned points, and any other specification mentioned in the
operation and maintenance manual of the pump provided by the pump
supplier. Not doing this could cause equipment damage and even
personal injury. It might even void the pump guarantee.