Goulds Pumps HS - IOM - Manual (Page 15)

HS IOM 5/08
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PUMP/DRIVER ALIGNMENT
1. Shaft Alignment of Horizontal Pump and Driver
Pumps and drivers that are received from the factory
with both machines mounted on a common subbase
were accurately aligned before shipment. Because all
subbases are, to some extent, flexible, factory
alignment may be altered during shipment and
handling. After the subbase has been leveled, grouted,
and secured, check the alignment. Alignment should
be rechecked after the pump is fully installed and
before startup. Refer to the “Alignment Procedure."
a. On certain large units, limited end-float couplings
are used, and the instruction book furnished with
such units should be consulted for the special
alignment instructions that apply to such couplings.
b. Disconnect coupling halves before proceeding with
alignment. Check for angular and parallel
alignment in the next section, Alignment Procedure.
The faces and outside diameters of the coupling
halves must be square and concentric with the
bores. If this condition does not exist, the
“Alternate Method” of alignment described in the
Pump/Driver Alignment section, is recommended.
Subbase mounted horizontal pumps may be shipped
with or without drivers and gears. Be sure pump
and drivers are uncoupled before installation. Level
by shimming beside each anchor bolt and grout.
2. Alignment Procedure A check for angular
alignment is made by inserting the tape gauge or
feelers at four points between the coupling faces at
four points spaced around the coupling. The unit will
be in angular alignment when the measurements show
that the coupling faces are the same distance apart at
all points (Fig.W7).
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.
NOTE: Care must be taken to have the straight edge
parallel to the axis of the shafts (Fig. W8).
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