Series MNKA bearing pedestal assembly 4
Page 19
9250-003-en
Revision 01
TM 10458
Published 06/2022
7.7 Instructions for assembly
♦
Use original spare parts. See also
section 2.4
.
♦
Never use faulty parts.
♦
Has the pump been taken out of operation,
drained and flushed correctly?
See also
section 6.3
.
♦
Coat fitting surfaces and screw threads with
anti-seize special assembly paste (e.g.
Weicon).
♦
The thread in impeller
230
, pump rotor
859
and
on pump shaft
211
must not be greased as this
would prevent an optimum adhesive bond.
♦
Bushes
523/1
in impellers
230
and
523/2
in
pump rotor
859
, O-rings
412
and housing gas-
ket
401
and shaft seals
421
in the case of oil
bath
lubrication
should
always
be
replaced.
♦
Important dimensions of centerings, bearing
fits or bearing clearances should be checked
before final assembly. If necessary, carry out
a trial assembly.
♦
For the structure and individual parts, see the
exploded view drawing in
section 9
and the
section drawing in
section 10
.
♦
Magnetic components such as the
859
pump
rotor and
858
drive rotor must be cleaned of
adhering metallic particles before assembly.
Simple plasticine can be used for this
purpose.
♦
A complete assembly is described below. Sub-
sections can be derived from it.
7.8 Assembly
7.8.1 Assembly of the drive unit and
long-life grease lubrication
♦
Press rolling bearings
321/1
and
321/2
onto
drive shaft
213
.
♦
Slide the drive shaft unit into bearing pedestal
330
, fit the wave spring washer
953/1
and the
rear bearing cover
361
, and tighten all
components using the cap screws
914/6
. Tor-
que 133 in-lb (15 Nm)
♦
Set up the bearing pedestal unit vertically and
secure it (e.g. in a vice).
♦
Fix drive rotor
858
with the flat pivot point on
drive shaft
213
.
Attention! Magnetic forces!
Risk of accident!
♦
Insert toothed lock washer
934/4
and tighten
cap screw
914/5
to a torque of 40 Nm.
If possible, use a non-magnetizable tool for
this purpose.
7.8.2 Assembly of the drive unit and oil
bath lubrication system
♦
Screw hexagon screw
901/4
into bearing ped-
estal
330
.
♦
Insert shaft seal
421/2
into bearing pedestal
330
.
♦
Insert shaft seal
421/2
and O-ring
412/1
into
rear bearing cover
161
.
♦
Press rolling bearings
321/1
and
321/2
onto
drive shaft
213
.
♦
Slide the drive shaft unit into bearing pedestal
330
, fit the wave spring washer
953/1
and the
rear bearing cover
361
, and tighten all compo-
nents using the cap screws
914/6
. Torque 133
in-lb (15 Nm).
♦
Set up the bearing pedestal unit vertically and
secure it (e.g. in a vice).
♦
Fix drive rotor
858
with the flat pivot point on
drive shaft
213
.
Attention! Magnetic forces!
Risk of accident!
♦
Insert toothed lock washer
934/4
and tighten
cap screw
914/5
to a torque of 40 Nm.
If possible, use a non-magnetizable tool for
this purpose.
7.8.3 Trial assembly of the slide-in unit
♦
Without adhesive
♦
Without O-rings
412/3, 412/4
♦
For assembly, see
section 7.8.3
.
♦
Dismantle the test-assembled unit and carry
out assembly.
