WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
Page 56 of 76
forces, the part should be replaced rather than
repaired.
2) Each bushing [1610] and impeller hub [2200],
or impeller wearing ring when installed; restore
running clearance that is recommended under
section 10.3 and trueness according to
instructions under section 6.8.2.7.6 or section
6.8.2.7.7 and section 6.8.2.7.8 below.
3) Each stationary casing wearing ring [1500]
and impeller skirt or impeller wearing ring,
when installed; restore running clearance that
is recommended under section 10.3 and
trueness according to instructions under
section 6.8.2.7.6 or section 6.8.2.7.7 and
section 6.8.2.7.8 below.
6.8.2.7.3
Checking Shaft Straightness
Application of heat to straighten
shaft [2100] will cause more distortion.
The term "soft-faced V-blocks" refers to
V-Blocks faced with metal that is softer than the
shaft, for example, V-blocks faced with copper.
After the shaft [2100] is inspected for damage as
described above, it must be checked for
straightness before reassembling rotating parts.
When making the check, do not turn shaft on its
lathe centers. It is possible for the lathe centers of
a straight shaft to be off center slightly, resulting in
a false indication of a bent shaft. The task
requires:
1) Setting bearing journals of shaft in soft V-
blocks (or equivalent), and
2) Checking straightness by taking dial indicator
readings all along the shaft [2100] while it is
rotated but particularly at bearing journal
[3020] areas and adjacent to the ends of
coupling keyway [6700.1]; total runout of shaft
shall not exceed maximum given in section
10.3. If runout is exceeded, shaft must be cold
straightened or replaced.
6.8.2.7.4
Checking Fit of Impellers and
Balance Drum with Shaft
The fit of each impeller [2200] bore around the
shaft [2100] at the designated stage of each
impeller (see impeller numbering under section
6.7.8.2) and the fit of the pressure reducing
balance drum [6230] bore around the shaft must
be correct or vibration is apt to occur. Proceed as
follows:
1) Verify shaft straightness (see section 6.8.2.7.3
above).
A three-point micrometer is the preferred
instrument for measuring bore; a stick micrometer
is its alternate. When measuring with the three-
point micrometer, measure close to the keyway;
with stick micrometer, measure at 90 degree
intervals.
2) Determine nominal interference fit of impellers
[2200] with shaft [2100] by:
a) Using micrometers to measure diameter of
bore under thickest metal near each end
of keyway of impeller and the
corresponding diameter of shaft, then,
b) Comparing diameter of bore of impeller
[2200] with corresponding diameter of
shaft [2100]; diameter of bore of impeller
shall be slightly smaller than
corresponding diameter of shaft by
amount given in section 10.3.
3) Determine nominal fit of balance drum [6230]
with shaft by:
a) Using micrometers to measure diameter of
bore at each end of balance drum [6230]
and the corresponding diameter of shaft
[2100], then,
b) Comparing diameter of bore of balance
drum [6230] with the corresponding
diameter of shaft [2100]; diameter of bore
of drum sleeve shall be slightly smaller
than corresponding diameter of shaft by
amount given in section 10.3.
If the fit of an Impeller [2200] or the
balance drum [6230] with the shaft [2100] is not as
given in the section 10.3, contact your nearest
Flowserve Sales Office for recommendations
concerning your particular circumstance (see
section 6.2.1).
6.8.2.7.5
Checking Concentricity Of Rotating
Assembly
Whenever the internal assembly has been
dismantled, the concentricity of the rotating
assembly (see assembly drawing) must be verified
before assembly. To vertically assemble the
rotating assembly, proceed as follows:
1) Assure yourself that you have complied with
the instructions above under the headings:
a) Cleaning, sections 6.8.1,
b) Visual inspection, section 6.8.2.7.1,
c) Checking running clearance, section
6.8.2.7.2,
