Goulds Pumps 3408 - IOM - Manual (Page 15)

3408 IOM 03/99
15
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If the unit has a non-flexible coupling (e.g. Falk Gear
coupling), the coupling halves should be disconnected;
this is generally not necessary on flexible type couplings
(e.g. Wood’s Sure-Flex coupling).
Tighten up all pump and motor bolts to assure they have
not loosened or a “soft foot” has occurred due to base
distortion in shipment. A “soft foot” causes a change in
the alignment when unloosening one bolt.
If the driver is being field installed, it should be centered in
its bolt holes with shims added to bring the driver into
rough alignment with the pump. (The pump may have to
be moved also.)
▲
! CAUTION
Do not exceed six (6) shims, using as thick a
shim as possible, otherwise “sponginess” or
“soft foot” will result. Place thin shims in
between thick shims.
Level and plumb the pump shaft, coupling faces and
flanges by adding or removing shims between the blocks
and the bottom of the base. Hand tighten the anchor bolt
nuts at first. Being very careful not to distort the base,
snug down the nuts with a wrench. The non-flexible
coupling should not be reconnected until the alignment
operation has been completed.
NOTE: The baseplate does not have to be level.
After foundation bolts are lightly torqued, recheck
alignment requirements once more. Follow
requirements outlined at the beginning of this section.
If alignment must be corrected, add or remove shims
or wedges under the baseplate.
The unit can then be grouted. (See Fig. 9)
Grout compensates for the uneven foundation.
Together with the baseplate, it makes a very rigid
interface between the pump and the foundation
distributing the weight over the length of the base and
preventing shifting.
Use an approved, non-shrinking grout such as
Embeco 636 or 885 by Master Builders, Cleveland,
Ohio or equivalent.
GROUTING PROCEDURE
1. Build a strong form around the foundation to
contain the grout.
2. Soak the top of the foundation thoroughly, then
remove surface water.
3. The baseplate should be completely filled with
grout and, if necessary, temporarily use air relief
tubing or drill vent holes to remove trapped air.
4. After the grout has thoroughly hardened
(approximately 24 hours), tighten the foundation
bolts fully.
5. Check the alignment after the foundation bolts
are tightened.
6. Approximately fourteen (14) days after the grout
has been poured and the grout has thoroughly
dried, apply an oil base paint to the exposed
edges of the grout to prevent air and moisture
from coming in contact with the grout.
Fig. 9
ALIGNMENT PROCEDURE
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