Xylem LSB - Manual (Page 88)

Installation, Operation and Maintenance Instruction Model LSB
LSB 100-english page 84 Revision 02
Artikel Nr. 771076129 Ausgabe 01/2010
pic 8
Pull up screw driver only so far as is absolutely
necessary to insert the guard plate into the
window. If the guard plate doesn´t stick fast in
the window after installation:
Dismantle guard plate once again, flatten it and
install again.
8.4 Removal of the Back Pull Out
Assembly
The back pull out assembly consists of all pump parts
except the volute casing (102V). As the pumps are
constructed in block design, the volute casing (102V)
can remain on the foundation and in the piping, if it´s
not the volute casing itself, which must be repaired.
Drain volute casing (102V) via drain plug (912.11).
Loosen screws of existing sealing or flushing
pipings.
Loosen screws of support food (183) from the
foundation (not existing on all sizes).
Hang the Back Pull Out Assembly onto a lifting
device, so that it won´t sink down or press into the
volute casing during the dismounting. Example
see picture 9 for lifting recommendations.
pic 9
Loosen hexagen head bolt (901.11) from the
casing.
Using the jack screws provided (901.42), separate
the Back Pull Out Assembly from the casing.
8.5 Removal of Impeller
Notice attached "Mounting Instruction for Shaft
Sealing".
If the impeller has back vanes check the axial
clearance "a" between the impeller (230) and
casing cover (161) before you continue the
dismounting. Refer to sect. 8.8.1.
Loosen impeller nut with a sensitive hit on the
wrench (right-hand thread). If necessary back up
with a pry bar in the cross boring of the stud shaft
(in clamp area).
Draw off the impeller (230) with two screw drivers
or pry bars (picture 10). Remove key (940.31).
Be sure to locate pry bars under impeller vanes
to prevent damage to the impeller.
For further dismounting, and for installation, the
Back Pull Out Assembly should be placed in a
vertical position. Prevent assembly from tipping!
pic 10
8.6 Removal of Shaft Sealing
Before you remove casing cover notice "Mounting
Instructions for Shaft Sealing".
Unfasten hexagonal nut (902.32) (not available on
all pump sizes) and take casing cover (161) out of
bearing bracket (344).
8.7 Removal of Stub Shaft
Loosen screws (920.41) and pull motor with stub
shaft (210) out of the motor lantern (341).
Loosen radial stub shaft screwing (904.41 and
904.42) (stud bolts) and deduct stub shaft (210)
from motor shaft. For support (break loose) you
can insert a solid screw driver into the cross
boring, press it against the front face of the motor
and move both shafts against each other.