Series RMI-B
close-coupled design
Page
17
9430-005-en
Revision 03
TM 10456
Edition 06/2022
7.6 Dismantling
There are two possibilities for dismantling:
1. Dismantling the complete pump from the plant.
2. Dismantling the complete slide-in unit as the pump
housing can remain in the plant connected to the
piping.
Dismantling of the complete pump is described here.
♦
Undo support bracket
183
from the base plate.
♦
The adapter and support bracket are one part in
the case of Groups 1.2 and 1.3. In the case of the
adapters of Group 1.1, the support bracket
183
is
fastened with 2 hexagon screws
901/2
and a con-
tact disc
557/2
.
As from IEC motor size 160, version B35 is used
and the adapter is not supported.
If the housing
100
remains in the system, leave the
wear ring seal
502/1
in the centering to protect the
housing sealing surface.
7.6.1 Removing adapter
♦
Undo hex. screws
901/5
from the connection lan-
tern/adapter.
♦
Remove adapter
346
from the centering of the
bracket
344
. If necessary, use two levers.
♦
To overcome the axial magnetic forces, pull the
adapter
346
upwards with a firm jerk.
CAUTION! When pulling out the bearing
pedestal, the axial magnetic forces
(up
to max. 400 N without weight force)
decrease abruptly after being at
maximum. Risk of accident!
The torque of the magnetic coupling is indicated on the
nameplate
.
7.6.2 Dismantling motor, adapter and
drive magnet assembly
♦
Undo motor nuts and screws
901/7
.
♦
Remove the screw plug
903/4
from the adapter.
♦
Loosen both setscrews
904/1
.
♦
Pull adapter
346
forward.
♦
Pull drive magnet assembly
858
off the motor shaft.
♦
If the drive magnet assembly is difficult to pull off,
use a jacking screw. See
Fig. 6
.
A
jacking screw
B
Motor shaft
Fig. 6
Motor
jacking screw
IEC 80
M12
IEC 90, 132
M16
IEC 160, 180, 200, 225
M20
♦
Remove adapter
346
.
7.6.3 Dismantling the slide-in unit
♦
Undo housing screws
901/3
.
♦
Screw 2 hex. screws
901/3
into the forcing thread
of the bracket
344
.
♦
Press the housing
100
with the aid of these hex.
screws out of the bracket
344
.
♦
Remove bracket
344
upwards.
♦
lift off can
159
and can insert
158
. As the shaft
222
is introduced tightly into the can insert
158
, this
shaft is automatically removed together with the
thrust ring
510/3
.
Make sure that no parts of the plain
bearing fall.
Risk of breakage!
♦
Remove shaft
222
with thrust ring
510/3
from the
can
158
. Place a suitable tool, e.g. scribing iron,
behind the thrust ring and pull it off applying force
at several positions.
♦
Remove housing gasket
401
.
♦
Raise inner magnet assembly
859
with impeller
230
vertically. The wear ring
502/1
is removed
from the housing
100
at the same time.
♦
Remove thrust ring
510/2
using a screwdriver.
♦
Press out the bearing bushes
545
and distance
ring
504/1
from the suction side of the impeller.
Use a suitable mandrel made of plastic.
♦
Alternatively, the puller can also be used. See as-
sembly aids in
section 10.2
.
♦
Remove anti-torsion insert
566/2
.
♦
The circlip
932/7
must be destroyed to separate
the impeller
230
and inner magnet assembly
859
.
For this purpose, carefully cut the circlip open with
a cutting knife all around the notch.
