WIK USER INSTRUCTIONS ENGLISH BO2662 5/09
Page 53 of 76
c) Heat and remove suction impeller [2200.1]
using the procedure outlined in section
6.7.8.1 above. Remove split ring [2531.1]
(if installed) and impeller key(s) [6700.4].
9) If required, set the shaft [2100] aside by
placing nylon lifting straps under each end
about 25% of total shaft length away from the
ends and lifting the shaft out of the V-blocks
using one hoist on each strap or one hoist and
a spreader bar. The shaft must be stored on a
flat, solid surface, at least 150 mm (6 in.)
above a metal or concrete surface. The
suction spacer casing [1130] may be set aside
by installing lifting gear, if required, and
moving it from the base assembly to any
convenient area.
6.7.8.4
Horizontal Disassembly
To disassemble the internal assembly in the
horizontal position, proceed as follows:
1) Attach a soft cable or nylon lifting strap to the
drip pocket of the case end plate (9322) and
carefully remove it from the suction spacer
(1130).
2) Set up U-shaped channel for disassembly of
internal assembly.
3) Place a nylon lifting strap under intermediate
cover [1460] at each end of the internal
assembly so that the load is evenly distributed.
Then use one hoist on each strap or one hoist
and a spreader bar to lift the internal assembly
and place it in the U-shaped channel. Turn the
internal assembly so that the assembly rail
[9363] is on top, and then remove lifting gear
and assembly rail [9363].
See the assembly drawing in the back of
this manual, to determine the method used to
secure the balance drum [6230].
4) Remove balance drum split ring retainer
[2530.2] and split ring [2531.2], if applicable.
5) Heat and remove balance drum [6230] using
the procedure outlined in section 6.7.8.1
above. If necessary, slide the drum toward the
coupling end of shaft to clear and remove split
ring [2531.2] before removing sleeve. Remove
the balance drum key [6700.5].
During horizontal disassembly you
may slightly lift the shaft [2100] to take the weight
of the rotor off of an impeller bushing [1610] or
wearing ring [1500], making it easier to slide the
impeller [2200] off of its impeller key [6700.4]. Do
not lift the shaft enough to apply force to the cover
or spacer as this may bend the shaft.
6) At the discharge stage, proceed as follows:
a) Heat and remove the discharge impeller
[2200] using the procedure outlined in
section 6.7.8.1 above. Remove the split
ring [2531.1] (if installed) and impeller
key(s) [6700.4].
b) Remove the discharge spacer casing
[1140] using the procedure outlined in
section 6.7.8.1 above.
7) At the next to last stage, and each successive
stage (except the first stage) proceed as
follows:
a) Heat and remove the impeller [2200] or
spacer sleeve (if installed) using the
procedure outlined in section 6.7.8.1
above. Remove the split ring [2531.1] (if
installed) and impeller key(s) [6700.4].
b) Remove the intermediate cover [1460] or
destaging spacer (if installed) using the
procedure outlined in section 6.7.8.1
above.
8) At the first stage, proceed as follows:
a) To prevent dropping the shaft [2100] in the
channel after removing the suction spacer
casing [1130], place two wooden blocks
under the shaft [2100] to maintain its
position. Place one block about 25% of
total shaft length from the free end, the
other next to the suction spacer casing
[1130] on the free end side of the suction
impeller [2200.1]. Do not place blocks
under the bearing journals [3020] area of
the shaft [2100].
b) Protect the coupling end of the shaft with
gasket material. Then attach lifting gear to
the suction spacer casing [1130], if
necessary, and move it off of the coupling
end of the shaft [2100].
To remove the suction impeller [2200.1],
it may be necessary to strike the impeller skirt with
two soft-faced mallets at points 180 degrees apart
using simultaneous blows.
c) Heat and remove suction impeller [2200.1]
using the procedure outlined in section
6.7.8.1 above. Remove split ring [2531.1]
(if installed) and impeller key(s) [6700].
9) If required, set the shaft aside by placing nylon
lifting straps under each end about 25% of
total shaft length away from the ends and
