Goulds Pumps 3409 - IOM - Manual (Page 19)

3409 IOM 11/04
19
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. 8)
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. 8
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
3