Flowserve MJ Slurry - Manual (Page 28)

MJ SLURRY USER INSTRUCTIONS ENGLISH 71569294 - 02/08
Page 28 of 42
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d) Disconnect the coupling halves or remove belts
from sheaves.
e) Disconnect water lubrication lines for lower
bearings
.
f) Disconnect pump from piping and remove spool
pieces as necessary.
g) Unbolt the top plate [6140] from the foundation
and remove pump from well.
For most pumps it is recommended that the
motor be removed.
The remaining steps assume that the pump has been
removed.
NEVER APPLY HEAT TO REMOVE IMPELLER
Trapped lubricant or vapour could cause an
explosion.
Heat could also cause damage to the impeller.
a) Place the pump in a horizontal position. Support the
casing and column pipe.
b) Disconnect discharge pipe from the casing. The
pipe clamp at the top plate may be removed to
allow complete removal of the discharge pipe.
c) Remove drop pipes or suction strainer from casing.
d) Unbolt the casing from column pipe and remove.
e) The impeller is threaded to the shaft and has been
self tightened to the shaft sleeve. To unscrew the
impeller the torque must be broken. It will be
necessary to either block the impeller or shaft at the
drive-end. To unscrew the impeller the shaft must
be turned counter-clockwise.
f) On small pumps the impeller can be removed and
held by hand however, larger units will require that
a hoist be used to lift the impeller. Place a sling
through the impeller vanes. Remove the impeller
[2200].
g) Remove impeller spacer and gaskets the shaft.
h) Remove flush piping from and pipe nipple from
lower housing [3200].
i) Remove lower bearing housing [3200] from the
column pipe.
6.8.3 Lower bearing
a) The cutlass rubber bearing is secured in place with
2 radial set screws. Locate and remove.
b) Press the bearing from the housing.
6.8.4 Column Pipe and Shaft
a) Disconnect the column pipe from the top plate or
intermediate pipe support [1360] and remove.
6.8.4.1 2 Pc Shafts
a) If the shaft is a 2 pc construction it will be necessary
to uncouple the 2 shafts.
6.8.4.1.1 Frames 1& 2
a) The coupling is threaded unto both shafts. Turn the
lower shaft clockwise while holding the coupling.
b) Remove the coupling from the upper shaft, hold the
shaft in position and turn the coupling clockwise.
6.8.4.1.2 Frame 3
Many older frame 3 assemblies may use a
coupling similar to frame 1 & 2. The current design for
frame 3 uses a clamp type coupling. This design is
distinguishable by the retaining rings on the shaft at
each end of the coupling.
a) Remove the retaining rings.
b) Side the coupling sleeve onto the lower shaft.
Note that the coupling is keyed to both shafts.
c) The shafts are locked together with a split collar
that can be removed once the coupling sleeve
is removed.
d) Place the lower shaft on a set of v-blocks
e) Remove coupling key [6700] from the upper
shaft.
6.8.4.2 Intermediate bearing
a) Remove the intermediate bearing housing from
the upper column pipe, where applicable.
b) Remove the radial setscrews from the housing.
c) Press the bearing from the housing.
6.8.4.3 Upper column pipe
c) Unbolt the upper column pipe from the motor stool
(direct drive) or bearing frame (MVD drive).
Remove the upper column pipe.
6.8.4.4 Shaft removal
6.8.4.4.1 Direct Drive
d) Remove adjusting hardware from the thrust bearing
housing.
e) Slide the thrust bearing housing and shaft assembly
from the motor stool.
f) Lift and place onto a v-block to support.
6.8.4.4.2 MVD Drive
a) Unfasten the line bearing cover [3260.1] from the
bearing frame [3130].
b) Slide the cover over the shaft and remove.
c) Remove adjusting hardware from the thrust
bearing housing.
d) Slide the thrust bearing housing and shaft
assembly from the bearing frame.
e) Lift and place horizontally onto a v-block to
support.
6.8.5 Thrust bearings
a) Remove the thrust bearing cover [3260.2] from the
thrust bearing housing [3240].
b) Remove the thrust bearing housing [3240] from
bearings.