Series MNKA,
acc. to ASME
Page 19
9250-050-en
Revision 11
TM 7903
Edition 07/2010
7.8 Assembly
7.8.1 Assembly of the bearing pedestal,
long life grease lubrication
Press both radial ball bearings
321/1
und
321/2
onto the drive shaft
213
.
Insert key
940/1
into the drive shaft.
Install pre-assembled drive shaft into the bearing
pedestal
330
from the motor side.
Insert wavy spring washer
953/1
into the bearing
pedestal
330
.
Mount rear bearing cover
361
with hex. socket
screws
914/2
.
Mount support bracket
183
(with group 2) with hex.
screws
901/2
and tooth lock washers
936/2
.
7.8.2 Assembly of the bearing pedestal,
oil bath lubrication
Press both radial ball bearings
321/1
and
321/2
onto the drive shaft
213
.
Insert rotary shaft seal
421/2
into the bearing
pedestal.
Insert key
940/1
into the drive shaft.
Install pre-assembled drive shaft into the bearing
pedestal
330
from the motor side.
Insert wavy spring washer
953/1
into the bearing
pedestal
330
.
Insert cover gasket
403
into the bearing pedestal.
Insert rotary shaft seal
421/1
into the rear bearing
cover
361
.
Mount rear bearing cover
361
with hex. socket
screws
914/2
.
Mount support bracket
183
(with group 2) with hex.
screws
901/2
and tooth lock washers
936/2
.
7.8.3 Drive magnet assembly
Clamp the pre-assembled bearing pedestal
330
on
the shaft end in the vice so that the carrier groove
is facing upwards.
Mount the drive magnet assembly
858
onto the
drive shaft so that the driver cams engage.
Screw in hex. socket screw
914/1
with tooth lock
washer
936/1
. Secure thread with a drop of Loctite,
for example. For tightening, a hex. socket key with
120 mm minimum length is required.
Screw bearing pedestal
330
/ lantern
344
together
with hex. socket screws
901/4
.
7.8.4 Assembly of can unit
Introduce can insert into the can (containment
shell). If this is not possible, cool can (containment
shell) insert to approx. 41 °F (5 °C).
Place intermediate ring
509/1
in the lantern
330
.
Insert the entire unit into the lantern
344
.
7.8.5 Perform trial assembly of the plain
bearing pedestal with impeller,
inner magnet assembly and plain
bearings
Without adhesive
Without O-ring
412/3.
Install bearing bushes
545/1
and
545/2
and press
in firmly.
Push on bearing sleeve
529/1
on the impeller side
and install this unit in the plain bearing pedestal
339
. Make sure that the cams of the anti-torsion
insert engage properly in the impeller.
Push distance ring
504
and bearing sleeve
529/2
onto the pump shaft.
Push inner magnet assembly
859
onto the pump
shaft.
Permit the anti-torsion cams of the pump-side
bearing sleeve
529/1
to engage in the grooves of
the impeller.
Screw on inner magnet assembly
859
together
with the bearing sleeve and tighten.
7.8.6 Checking bearing play Z and
impeller distance X
The distances X, Y and Z are indicated in the works
certificate.
X: Distance behind the impeller
Y: Distance in front of the impeller
Z: Axial play of the plain bearings
Press inner magnet assembly towards the
impeller.
Measure distance X
1
behind the impeller.
Press impeller towards the motor.
Measure distance X
2
behind the impeller.
Z = X
1
- X
2
Are the values correct?
These values must be checked after final assembly.
