WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
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cooling it with shop air or by allowing it to
be cooled by ambient air (do not use any
other means to cool shaft)
c) The shaft [2100], wearing rings 1500],
bushings [1600 & 1610], and impeller
[2200] hubs are lubricated with a lubricant
that is compatible with your pumpage such
as powdery Molykote or Neolube (graphite
in isopropanol)
Application of excessive heat can
cause part distortion and damage. Application of
insufficient heat can cause scouring of the parts
when attempting installation. Ensure that the part
is heated to the temperature specified in section
10.3 before installation.
2) To heat a part to its installation temperature
specified in section 10.3, proceed as follows:
a) Heat the impellers [2200], pressure
reducing balance drum [6230], and spacer
sleeve (if installed) in an oven to their
required installation temperature as given
in section 10.3. For best results, start with
the suction impeller [2200.1] and place as
many impellers [2200] in the oven as
possible in stage sequence. Then, as
impellers [2200] are removed for
installation, place the next impeller [2200]
in sequence into the oven. This will avoid
delay in the assembly process.
b) If an oven is not available, then heat the
impellers [2200] or sleeves [6230] as each
is to be installed using two torches with
number 10 Rosebud heads. Heat the
impeller [2200] or sleeve [6230] evenly by
working the torches in a continuous
circular path from the outer rim to the
center, using the two torches to heat both
sides simultaneously, until it reaches the
installation temperature specified in
section 10.3.
c) To heat a suction spacer casing [1130] or
intermediate cover [1460]: use a torch with
a number 10 Rosebud head and make
uniform passes around the outer surface
where the cover or spacer meets the
cover that is to be installed, keeping this
surface at the temperature given in section
10.3. Do not heat the entire outer surface,
and do not heat the cover that is to be
installed.
Use lifting gear when moving any part
that weighs more than 22 kg (50 Ib) to prevent
personnel injury and part damage due to
dropping.
Always ensure that hot parts are handled with
soft cables or hands protected by heat-
resistant gloves to prevent personnel injury.
3) When a part has been heated to its installation
temperature, then install lifting gear on the part,
if required, and install the part on the
assembly. Remove lifting gear, if installed.
4) Before continuing on to next stage, cool shaft
[2100] and impeller [2200] or sleeve [6230] to
within 11°C (20°F) of ambient temperature
using shop air or by allowing ambient air to
cool them. Do not use any other means to cool
parts
6.9.1.2
Vertical Assembly
Parts that make up the internal assembly are
precision finished with close clearances between
rotating and stationary parts; thus, utmost care
must be taken to properly assemble parts and
ensure that specified clearances and dynamic
balance are maintained. Horizontal assembly of
the internal assembly is not allowed. To vertically
assemble the internal assembly, proceed as
follows:
The vertically held shaft [2100] and
suction spacer casing [1130] must be in correct
relationship or the assembly will not be correct.
Therefore, the base assembly must allow for
adjustment of the height of either the shaft [2100]
or suction spacer casing [1130].
1) Set up base assembly in work area.
2) Set up soft-faced V-blocks near base
assembly spaced to support the shaft at about
25% of total shaft length from each end. Block
under coupling end must not impede
movement of suction impeller [2200.1] into
place. Place two nylon lifting straps under
shaft [2100] about 25% of shaft length from
each end. Then, using one hoist for each strap
or one hoist with a spreader bar, lift the shaft
[2100] and place it in the V-blocks.
3) Assemble suction impeller [2200.1] as follows:
a) Install first stage split ring [2531.1] (if
installed) and impeller key(s) [6700.4],
ensuring that ends of split ring match
evenly.
b) Install the suction impeller [2200.1] on the
impeller key [6700.4] and against the split
ring [2531.1] (or shaft shoulder, if no split
ring is installed) using the procedure
